PT0E-2113

Portable Gas Detector
GX-9000 Series
GX-9000
GX-9000H
Operating Manual(PT0-211)

2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan
Phone： +81-3-3966-1113
Fax： +81-3-3558-9110
E-mail： intdept@rikenkeiki.co.jp
Web site： https://www.rikenkeiki.co.jp/english/

Contents

Contents
1.

Product Overview ...................................................................................................................................... 5
1-1 Introduction .......................................................................................................................................... 5
1-2 Intended use ........................................................................................................................................ 5
1-3 Checking the detection target gases and product model...................................................................... 7
1-4 DANGER, WARNING, CAUTION, and NOTE ................................................................................... 10
1-5 Checking standards and explosion-proof specifications ..................................................................... 112.

Important Safety Information .................................................................................................................... 12
2-1 Danger information ............................................................................................................................ 12
2-2 Warnings ........................................................................................................................................... 14
2-3 Precautions........................................................................................................................................ 16
2-4 Safety information .............................................................................................................................. 20

3.

Product Configuration .............................................................................................................................. 23
3-1 Main unit and accessories ................................................................................................................. 23
3-1-1 Main unit ................................................................................................................................. 23
3-1-2 Accessories ............................................................................................................................ 24
3-1-3 Optional accessories .............................................................................................................. 25
3-2 Part names and functions .................................................................................................................. 30
3-2-1 Main unit and battery unit ....................................................................................................... 30
3-2-2 Control panel .......................................................................................................................... 32
3-2-3 LCD display ............................................................................................................................ 34

4.

Alarm Functions ....................................................................................................................................... 36
4-1 Gas alarm types ................................................................................................................................ 36
4-2 Gas alarm setpoints ........................................................................................................................... 36
4-3 Gas alarm patterns ............................................................................................................................ 42
4-4 Fault alarm patterns ........................................................................................................................... 45
4-5 Outside operating temperature range warning ................................................................................... 46

5.

Usage Instructions ................................................................................................................................... 47
5-1 Usage note ........................................................................................................................................ 47
5-2 Removing and attaching the battery unit and charging ...................................................................... 48
5-2-1 Removing and attaching the battery unit................................................................................. 48
5-2-2 Charging the lithium ion battery unit (BUL-9000) .................................................................... 50
5-2-3 Replacing the dry battery unit (BUD-9000) ............................................................................. 52
5-3 Connecting the gas sampling rod....................................................................................................... 54
5-4 Turning on the power ......................................................................................................................... 55
5-5 Selecting hydrogen sulfide measurement mode range (GX-9000H) .................................................. 60
5-6 Performing fresh air adjustment in measurement mode ..................................................................... 61
5-7 Measurement..................................................................................................................................... 64
5-7-1 Measuring gas concentration.................................................................................................. 67
5-7-2 Combustible gas concentration range changeover points ....................................................... 69
5-7-3 Basic operating flow in measurement mode ........................................................................... 70
5-7-4 Confirmation beep operation .................................................................................................. 72
5-8 Recording gas concentration logs (snap logger) ................................................................................ 73
5-9 Stopping the pump............................................................................................................................. 74
5-10 Turning off the power ....................................................................................................................... 75

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Contents

6.

Settings (Display Mode) ........................................................................................................................... 76
6-1 Display mode items ........................................................................................................................... 76
6-2 Switching to display mode ................................................................................................................. 79
6-3 Checking settings .............................................................................................................................. 80
6-3-1 Clearing the PEAK value ........................................................................................................ 80
6-3-2 Displaying the snap logger (gas concentration/alarm status) .................................................. 81
6-3-3 Displaying adjustment records ................................................................................................ 82
6-3-4 Displaying bump test records ................................................................................................. 83
6-3-5 Displaying alarm setpoints ...................................................................................................... 84
6-4 Display mode settings........................................................................................................................ 86
6-4-1 Setting the NCF/TEF sensor range......................................................................................... 86
6-4-2 Combustible gas conversion gas selection ............................................................................. 87
6-4-3 Volatile organic compound (VOC) conversion gas selection ................................................... 89
6-4-4 Setting the user ID .................................................................................................................. 91
6-4-5 Setting the station ID .............................................................................................................. 92
6-4-6 Setting a Bluetooth device connection .................................................................................... 93
6-4-7 Setting the buzzer volume ...................................................................................................... 94
6-4-8 Switching display language to English (ATEX/IECEx model) .................................................. 95
6-4-9 Switching display language to Japanese (Japan Ex model) ................................................... 96

7.

Settings (User Mode) ............................................................................................................................... 97
7-1 User mode display items.................................................................................................................... 97
7-2 Switching to user mode ..................................................................................................................... 99
7-3 Gas alarm settings ........................................................................................................................... 100
7-3-1 Setting alarm setpoints ......................................................................................................... 100
7-3-2 Setting alarm type................................................................................................................. 104
7-3-3 Setting alarm pattern ............................................................................................................ 106
7-3-4 Resetting alarm setpoints ..................................................................................................... 107
7-3-5 Enabling/disabling the alarm function ................................................................................... 108
7-4 Other user mode settings................................................................................................................. 109
7-4-1 Setting the buzzer................................................................................................................. 109
7-4-2 Enabling/disabling CO2 fresh air adjustment ......................................................................... 110
7-4-3 Selecting gas type for base gas adjustment ......................................................................... 111
7-4-4 Setting the date and time ...................................................................................................... 112
7-4-5 Setting the display language................................................................................................. 113
7-4-6 Displaying version information .............................................................................................. 114

8.

Maintenance .......................................................................................................................................... 116
8-1 Maintenance intervals and items...................................................................................................... 116
8-2 Performing gas adjustment .............................................................................................................. 118
8-2-1 Preparation for gas adjustment ............................................................................................. 118
8-2-2 Performing fresh air adjustment ............................................................................................ 122
8-2-3 Performing CO2 zero adjustment .......................................................................................... 124
8-2-4 Performing base gas adjustment .......................................................................................... 127
8-2-5 Setting span adjustment ....................................................................................................... 129
8-2-6 Performing span adjustment ............................................................................................... 134
8-3 Performing bump tests ..................................................................................................................... 136
8-4 Performing alarm tests ..................................................................................................................... 138
8-5 Cleaning procedure ......................................................................................................................... 139
8-6 Parts replacement............................................................................................................................ 140

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Contents

8-6-1 Periodic replacement parts ................................................................................................... 140
8-6-2 Gas sampling rod dust filter replacement.............................................................................. 142
8-6-3 VOC sensor maintenance..................................................................................................... 143
9.

Storage and Disposal............................................................................................................................. 148
9-1 Procedures for storage or when not in use for extended periods ..................................................... 148
9-2 Procedures for use after storage...................................................................................................... 149
9-3 Product disposal .............................................................................................................................. 149

10.

Troubleshooting ..................................................................................................................................... 150
10-1 Product abnormalities .................................................................................................................... 150
10-2 Reading abnormalities ................................................................................................................... 154

11.

Product Specifications ........................................................................................................................... 155
11-1 Product specifications .................................................................................................................... 155
11-1-1 GX-9000 specifications ....................................................................................................... 155
11-1-2 GX-9000H specifications .................................................................................................... 157
11-2 Sensor specifications ..................................................................................................................... 158
11-2-1 Combustible gas sensors ................................................................................................... 158
11-2-2 Carbon dioxide sensor ........................................................................................................ 162
11-2-3 Oxygen sensor ................................................................................................................... 163
11-2-4 Toxic gas sensors............................................................................................................... 165
11-2-5 VOC sensors ...................................................................................................................... 169

12.

Appendix................................................................................................................................................ 170
12-1 Data logger function....................................................................................................................... 170
12-2 100 %LEL conversion list............................................................................................................... 172
12-3 Zero suppression function.............................................................................................................. 173
12-4 Zero follower function .................................................................................................................... 174
12-5 Volatile organic compound (VOC) conversion gas list.................................................................... 175
12-6 List of interference gases for electrochemical type sensors ........................................................... 198
12-7 Radio law certification .................................................................................................................... 201
12-8 Limited Warranty and Limitation Liability ........................................................................................ 203

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1. Product Overview

1-1 Introduction

1

Product Overview
1-1 Introduction
Thank you for purchasing this GX-9000 Series Portable Gas Detector (“product” hereinafter).
This operating manual describes product operating procedures and specifications. It provides information
essential to correct use of the product.
Make sure you have read and fully understood the contents of this manual before using the product.
Keep this operating manual on hand to allow ready reference during use.
The contents of this manual are subject to change without notice to allow product improvements. Any
duplication or reproduction of this manual without permission is prohibited, whether in whole or in part.
Also refer to the corresponding manuals when using the following optional products:
 SW-9000 Series Data Logger Management Program Operating Manual (PT0-208)
 MT-9000 Series Setup Program Operating Manual (PT0-209)
RIKEN KEIKI accepts no liability for accidents or damage resulting from use of the product, whether withinor outside the warranty period.
Review the warranty policy described in ‘12-8 Warranty policy’.

<Models covered by this operating manual>
Before using the product, please confirm that the model of the product you purchased matches the model ofthe product covered by this operating manual.
 GX-9000
 GX-9000H

1-2 Intended use
This product is a multi-gas detector capable of detecting combustible gases (%LEL), oxygen (O2) (oxygen
deficiency, excess oxygen), carbon monoxide (CO), hydrogen sulfide (H2S), carbon dioxide (CO2), ammonia(NH3), chlorine (Cl2), ozone (O3), hydrogen chloride (HCl), sulfur dioxide (SO2), hydrogen cyanide (HCN),and volatile organic compounds (VOCs) in air, and high concentrations of combustible gases (vol%) andoxygen (O2) in nitrogen (N2) or inert gases.
One unit measures up to six different gas concentrations. The alarm function triggers an alarm if gas
concentrations reach or exceed the alarm setpoint.
The product is capable of measuring methane (CH4), commonly used in general plants and oil tankers, aswell as general combustible gases such as isobutane (HC (i-C4H10)), hydrogen (H2), and acetylene (C2H2).
Note that the measurement results provided by the product do not constitute a guarantee with respect to lifeor safety.
Check again the specifications before use to perform gas measurement correctly in accordance with theintended purpose.

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1. Product Overview

1-2 Intended use

The following sensors can be installed in the product:
Sensor typeCombustible gas
sensorCarbon dioxide
sensorOxygen sensor

Detection principle

NCF-6322P (CH4/HC (i-C4H10)/H2/C2H2)

TEF sensor

Thermal conductivity typeTEF-7520P (CH4/HC (i-C4H10)/H2)

IRF sensor

Non-dispersive infraredtype (NDIR)

IRF-4341 (CH4)
IRF-4345 (HC (i-C4H10))

IRF sensor

Non-dispersive infraredtype (NDIR)

IRF-4443 (CO2)

ESR sensor

Electrochemical type

ESR sensor

Electrochemical type

ESF sensor

Electrochemical type

PIF sensor

Photo-ionization type (PID)

Toxic gas sensor

VOC* sensor

Sensor model

New ceramic type

NCF sensor* Volatile organic compounds

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ESR-X13P (O2)ESR-A13i (H2S) (low concentrations)
ESR-A13P (CO)ESF-A24R2 (H2S) (high concentrations)
ESF-B242 (NH3)
ESF-C930 (Cl2)
ESF-B249 (O3)
ESF-A24E2 (HCl)
ESF-A24D4 (SO2)
ESF-A24D (HCN) (Japan Ex model)
PIF-001 (VOC, 10.6 eV, ppb)
PIF-002 (VOC, 10.6 eV, ppm)
PIF-003 (VOC, 10.0 eV, ppm)

1. Product Overview

1-3 Checking the detection target gases and product model

1-3 Checking the detection target gases and product model
The detection target gases vary depending on the particular sensors installed in the product.
Check the detection target gases using the product code before use.
The GX-9000 Series alphanumeric product codes are categorized as follows:

①

②

③

④

⑤

⑥

⑦

⑧

⑨

⑩

⑪

⑫

Explosionproof
specifications
Bluetooth (BLE) functionality
Battery typeF sensor (F2/F3) combination
F sensor (F1) combination
R sensor combination
Product model<GX-9000/GX-9000H>①: Product model
Symbol

DetailsC

GX-9000

D

GX-9000H②: R sensor combination
Symbol

R1

R2

0

R3

N/A (dummy sensor)

1

ESR-X13P (O2)ESR-A13i (H2S)

ESR-A13P (CO)2

ESR-X13P (O2)ESR-A13i (H2S)

N/A (dummy sensor)

3

ESR-X13P (O2)

N/A (dummy sensor)

ESR-A13P (CO)4

ESR-X13P (O2)5

N/A (dummy sensor)

ESR-A13i (H2S)

ESR-A13P (CO)6

N/A (dummy sensor)

ESR-A13i (H2S)

N/A (dummy sensor)

7

N/A (dummy sensor)

N/A (dummy sensor)

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ESR-A13P (CO)

1. Product Overview

1-3 Checking the detection target gases and product model<GX-9000>③④: F sensor (F1) combination
SymbolF100

N/A (dummy sensor)

P1

PIF-001 (VOC, 10.6 eV, ppb)

P2

PIF-002 (VOC, 10.6 eV, ppm)

P3

PIF-003 (VOC, 10.0 eV, ppm)

E1

ESF-B242 (NH3)E2

ESF-C930 (Cl2)*1

E3

ESF-B249 (O3)*1

E4

ESF-A24E2 (HCl)E5

ESF-A24D4 (SO2)

E6

ESF-A24D (HCN) Japan Ex modelR5

IRF-4443 (CO2)*2*1: When this sensor is selected, ESR-A13i (H2S) cannot be selected for installation in ②: R sensor combination.
*2: This sensor can be selected only when NCF-6322P is installed for F3 in ⑤ to ⑧ F sensor (F2, F3) combination.

⑤ to ⑧: F sensor (F2, F3) combination
Symbol

F2

F3

00 00

N/A (dummy sensor)

00 N1

N/A (dummy sensor)

T1 N1

TEF-7520P (CH4)

NCF-6322P (CH4)
NCF-6322P (CH4)00 N2N/A (dummy sensor)

NCF-6322P (HC (i-C4H10))

T2 N2

TEF-7520P (HC (i-C4H10))

NCF-6322P (HC (i-C4H10))00 N4

N/A (dummy sensor)

NCF-6322P (H2)*3

T4 N4

TEF-7520P (H2)

NCF-6322P (H2)*3

00 N5

N/A (dummy sensor)

NCF-6322P (C2H2)*3*4
N/A (dummy sensor)

R1 00

IRF-4341 (CH4)

R1 R5

IRF-4341 (CH4)

IRF-4443 (CO2)R2 00

IRF-4345 (HC (i-C4H10))

N/A (dummy sensor)

R2 R5

IRF-4345 (HC (i-C4H10))

IRF-4443 (CO2)00 R5N/A (dummy sensor)

IRF-4443 (CO2)*3: When this sensor is selected, ESR-A13P (CO) cannot be selected for installation in ②: R sensor combination.
*4: When this sensor is selected, ESF-A24D4 (SO2) and ESF-A24D (HCN) cannot be selected for installation in ③④: F sensor(F1) combination.

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1. Product Overview

1-3 Checking the detection target gases and product model<GX-9000H>③④: F sensor (F1) combination
SymbolF1

E8

ESF-A24R2 (H2S)⑤ to ⑧: F sensor (F2, F3) combination
Symbol

F2

F3

00 00

N/A (dummy sensor)

00 R1

N/A (dummy sensor)

IRF-4341 (CH4)00 R2N/A (dummy sensor)

IRF-4345 (HC (i-C4H10))<GX-9000/GX-9000H>⑨: Battery type
SymbolSpecifications

L

Lithium ion battery unit BUL-9000

D

Dry battery unit BUD-9000⑩: Bluetooth (BLE) functionality
SymbolSpecifications

0

Not Bluetooth compatible

1

Bluetooth compatible⑪⑫: Explosion-proof specifications
SymbolSpecifications

00

Japan Ex50

ATEX/IECEx<Example product codes>
The specifications for the product code examples listed here are as follows:
Example product code
Product model
R1
R sensor

F sensor

Battery type

C1P1T1N1L0 00

C7P2R100D1 50

GX-9000

GX-9000

D2E800R1L1 00
GX-9000H

ESR-X13P (O2)N/A

ESR-X13P (O2)R2

ESR-A13i (H2S)

N/A

ESR-A13i (H2S)

R3

ESR-A13P (CO)ESR-A13P (CO)

N/A

F1

PIF-001(VOC, 10.6 eV, ppb)

PIF-002(VOC, 10.6 eV, ppm)

ESF-A24R2 (H2S)

F2

TEF-7520P (CH4)

IRF-4341 (CH4)

N/A

F3

NCF-6322P (CH4)

N/A

IRF-4341 (CH4)

BUL-9000

BUD-9000

BUL-9000

Bluetooth (BLE)
functionality

Not compatible

Compatible

Compatible

Explosion-proof
specifications

Japan ExATEX/IECEx

Japan Ex

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1. Product Overview

1-4 DANGER, WARNING, CAUTION, and NOTE

1-4 DANGER, WARNING, CAUTION, and NOTEThis operating manual uses the following categories to indicate potential damage/hazards if the user
disregards the information provided and uses the product incorrectly:

DANGER

This indicates situations in which improper handling may result in fatal or

WARNING

This indicates situations in which improper handling may result in serious injury

CAUTION

This indicates situations in which improper handling may result in minor injury or

serious injury or significant property damage.
or significant property damage.
minor property damage.

Additionally, usage recommendations are indicated as follows:

NOTE

This indicates items that will be helpful to know when using the product.

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1. Product Overview

1-5 Checking standards and explosion-proof specifications

1-5 Checking standards and explosion-proof specifications
The product specifications will vary depending on the specific standards and explosion-proof certification.
Check the actual product specifications before use. For CE marking models, refer to the “Declaration ofConformity” in the Appendix.
Check the affixed nameplate for product specifications.

Type examination
certificate marking
locations

Ex marking/CE marking
location

Typical nameplates for explosion-proof electricalequipment type certified (Japan EX) model

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Typical nameplate for ATEX/IECEx model2. Important Safety Information

2-1 Danger information

2

Important Safety Information
To maintain the performance of the product and to ensure safe use, always observe the following DANGER,WARNING, and CAUTION instructions.

2-1 Danger information
DANGER
Main unit explosion-proofing Do not modify or alter the circuits or configuration.
 When carrying and using the product in hazardous areas, the following general precautions must be
observed to safeguard against static electricity hazards:
・ Wear anti-static clothing and conductive shoes (anti-static work shoes).
・ When using the product indoors, stand on a conductive work floor (with a leakage resistance of 10 MΩ
or less).
 The product is explosion-proof. With the exception of specified components, it cannot be disassembled
or modified.
 Do not subject the buzzer opening on the main unit to impact.
 The ratings for the main unit are as follows:
Power source:
User-replaceable lithium ion battery unit model BUL-9000 or
user-replaceable dry battery unit BUD-9000
Ambient temperature*: -40 °C to +60 °C* Ambient temperature refers to the temperature range in which the explosion-proof performance canbe maintained. It does not refer to the temperature range in which product performance isguaranteed.
For information on the operating temperature range, refer to ‘11-1 Product specifications’ and ‘11-2
Sensor specifications’.
Battery unit explosion-proofing Do not modify or alter the circuits or configuration.
 When carrying and using the product in hazardous areas, the following general precautions must be
observed to safeguard against static electricity hazards:
・ Wear anti-static clothing and conductive shoes (anti-static work shoes).
・ When using the product indoors, stand on a conductive work floor (with a leakage resistance of 10 MΩ
or less).
 The battery unit can be used only after evaluation in combination with a main unit and only whencombined with a main unit that has passed the type examination.
The main unit to which the battery unit can be connected is the GX-9000 or GX-9000H.
 The ratings for the BUL-9000 lithium ion battery unit are as follows:
Power source:
3.7 V DC, 250 mA
Battery charging contact allowable voltage: 5.7 V DC (SELV only)
Ambient temperature*:-40 °C to +60 °C* Ambient temperature refers to the temperature range in which the explosion-proof performance canbe maintained. It does not refer to the temperature range in which product performance isguaranteed.
For information on the operating temperature range, refer to ‘11-1 Product specifications’ and ‘11-2
Sensor specifications’.
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2. Important Safety Information

2-1 Danger information

 The ratings for the BUD-9000 dry battery unit are as follows:
Power source:

4.5 V DC, 250 mAInterface connector allowable voltage: 5.7 V DC (SELV only)
Ambient temperature*:-40 °C to +60 °C* Ambient temperature refers to the temperature range in which the explosion-proof performance canbe maintained. It does not refer to the temperature range in which product performance isguaranteed.
For information on the operating temperature range, refer to ‘11-1 Product specifications’ and ‘11-2
Sensor specifications’.
Usage If measuring inside manholes or enclosed spaces, never lean over or look into the manhole or
enclosed space. There is a danger that oxygen-deficient air or other gases may be discharged fromsuch locations.
Gas outlet
 Oxygen-deficient air or other gas may be discharged from the gas outlet. Never breathe in this air.
 High-concentration (100 %LEL or higher) gas may be discharged. Be sure to maintain a safe distancefrom flame sources.

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2. Important Safety Information

2-2 Warnings

2-2 Warnings
WARNING
If an abnormality occurs
 Contact RIKEN KEIKI immediately. Visit our website for information on the nearest RIKEN KEIKI office.
Website: https://www.rikenkeiki.co.jp/
Sampling point pressure The product is designed to draw in gas at atmospheric pressure. There is a danger that detection
target gas may leak from inside the product if an excessive pressure is applied to the gas inlet (GASIN) or outlet (GAS OUT) of the product. Be careful to avoid excessive pressure during use.
 Do not connect a gas sampling tube directly to locations pressurized above atmospheric pressure.
Doing so may result in damage to the internal pipes.
Sensor handling Never disassemble the sensor.
Electrochemical type sensors in particular contain hazardous electrolyte. Contact with electrolyte may
result in skin inflammation. Contact with eyes may result in blindness. Contact with clothing may resultin discoloration or damage to the fabric.
If contact occurs, rinse the area immediately with plenty of water.
 Do not use any gas other than nitrogen (N2) as the balance gas when adjusting the oxygen sensor.
Otherwise, oxygen (O2) reading errors will increase, preventing accurate measurement.
Fresh air adjustment in surrounding atmosphere When fresh air adjustment is performed in the surrounding atmosphere, check to confirm that the air isclean before starting. The presence of miscellaneous or interference gases will make it impossible toadjust the product correctly, resulting in the danger of erroneous detection when actual gas leaks occur.
Action if a gas alarm occurs
 A gas alarm indicates an extreme hazard. The user must take appropriate action after taking
appropriate steps to ensure safety.
Battery level check Check the battery level before using the product. The batteries may be depleted when the product isused for the first time or after extended periods without use. Always fully charge or replace with newbatteries before use.
 Gas measurement will not be possible if a battery low voltage alarm occurs. If the alarm occurs duringuse, turn off the power and promptly charge or replace the batteries in a safe place.
Miscellaneous Do not use the product in rain or submerge it in water. Doing so may cause water to enter the product,
resulting in the failure of the sensors or the product. Even if this does not result in failure, a wet sensor
may be unable to detect gases.
 When using the product, always make that the product is able to suck in air. If the product inlet iscovered or blocked, correct measurement cannot be obtained, possibly leading to accidents.
 Do not leave the product exposed for extended periods to temperatures -10 °C or below. Doing so may
cause the pump valve to freeze, disabling normal operation of the pump.

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2. Important Safety Information

2-2 Warnings

 Do not dispose of the product into fire.
 Do not attempt to wash the product, either in a washing machine or an ultrasonic cleaning machine.
 Do not block the buzzer sound opening. Doing so will muffle or silence the audible warning.
 Do not remove the battery unit while the power is turned on.
 Do not subject the product to vibration or impact, such as by carrying it around with the water trap (soldseparately) fitted to it. Doing so may damage the gas inlet (GAS IN).

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2. Important Safety Information

2-3 Precautions

2-3 Precautions
CAUTION
Avoid use in locations where oil or chemicals may splash. Avoid deliberately submerging the
product in water.
 Avoid using the product in locations where the product may be splashed with liquids such as oil andchemicals.
 The product is not designed to be water pressure resistant. Avoid exposing the product directly towater from a faucet or shower as water may get in the product if it is subjected to water pressure. Notethat the product is waterproof against freshwater and tap water, but it is not waterproof against hot
water, saltwater, detergent, chemicals, or perspiration.
 The gas inlet (GAS IN) and outlet (GAS OUT) are not waterproof. Take care to prevent water such as
rainwater from entering these parts. Failure to do so may prevent gas measurement.
 Do not place the product in locations where water or dirt accumulates. Placing the product in suchlocations may cause malfunction due to water or dirt ingress into the buzzer sound opening or gas inlet(GAS IN), etc.
 The sensor sensitivity will be significantly reduced if dirty water, dust, or metal particles are drawn in.
Take adequate care when using in such environments.
 The dustproof and waterproof construction rating of IP66/68 (IPx8 indicates no water ingress will occur
if the product is immersed to a depth of two meters for one hour) does not refer to whether or not the
product is capable of detecting gas during or after exposure to the corresponding conditions. Be sure
to remove any dust or water.
Do not use the product in locations outside the operating temperature range.
 Avoid using the product at temperatures outside the operating temperature range.
 Avoid using the product for extended periods in locations where it is exposed to direct sunlight.
 Avoid storing the product inside parked vehicles in hot weather.
Use within the specified operating humidity range to avoid condensation in the product or gas
sampling tube.
 Condensation forming inside the product or gas sampling tube may cause clogging or gas adsorption,
which may prevent accurate gas measurement. Condensation must be avoided at all costs.
In addition to the usage environment, carefully monitor the temperature and humidity of the sampling
point to prevent condensation forming inside the product.
Do not use walkie-talkies near the product.
 Radio waves from walkie-talkies or other radio transmitters near the product may affect readings. If
walkie-talkies or other radio wave transmitting devices are used, these must be used away from theproduct where they do not affect operation.
 Do not use the product near devices that emit strong electromagnetic radiation (high-frequency or
high-voltage devices).
Verify that the flow confirmation icon is rotating.
 Correct gas measurement is not possible if the flow confirmation icon is not rotating. Check to confirm
that the suction is operating correctly.
Verify that the operating status icon is blinking.
 If the operating status icon on the LCD is not blinking, gas cannot be measured correctly. (Refer to‘3-2-3 LCD display’.)Be sure to perform regular maintenance.
 The product is a safety device and must be regularly maintained without fail. Continuing to use theproduct without maintenance will result in sensor sensitivity variations, preventing accurate gas
measurement.
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2. Important Safety Information

2-3 Precautions

Miscellaneous Pressing buttons unnecessarily may change the settings, preventing alarms from activating correctly.
Avoid performing any operations not described in this operating manual.
 Do not drop the product or subject it to impact. Doing so may reduce accuracy.
 Do not use the product while charging it.
 Do not prod the buzzer sound opening with sharp objects. Doing so may result in malfunctions or
damage to the product and allow foreign matter inside.
 Do not remove the panel sheet on the LCD display. Doing so will impair dustproof performance.
Sensors
 Do not expose the product to sudden pressure fluctuations. Oxygen readings (O2) will vary temporarily,
preventing accurate measurement.
 If highly adsorptive gas has been sucked in, allow the product to suck in clean air, and confirm that thereading returns to zero before use.
 If the separately sold sampling tube with float or weight is used when measuring highly adsorptive gas,
the gas may be adsorbed inside the tube, resulting in a lower concentration reading than the actual
concentration of the detection target gas at the measurement point.
 Some sensors may exhibit positive sensitivity to gases other than the detection target gas.
Note that when the product is used in an environment where such gases are present, the reading may
be higher than the actual concentration of the detection target gas present.
<Examples of interference gases to which the sensor exhibits positive sensitivity>
Sensor detection
principle

Detection target gas nameInterference gas

New ceramic type

Methane (CH4)/isobutane (HC (i-C4H10))/hydrogen (H2)/acetylene (C2H2)

All combustible gases

Non-dispersive infraredtype (NDIR)

Methane (CH4)/isobutane (HC (i-C4H10))

Hydrocarbon combustible
gases

Photo-ionization type
(PID)

Volatile organic compounds (VOCs)

All volatile organic
compounds (VOCs)

 Due to their operating principle, electrochemical type sensors may exhibit negative sensitivity to certain
interference gases. In environments where interference gases are present, the reading may be lower
than the actual concentration of the detection target gas present, and particularly at highconcentrations, the reading may even turn negative, triggering an M OVER alarm. (Refer to ‘12-6 Listof interference gases for electrochemical type sensors’.) Note that if new ceramic type combustible gas sensors are used in an environment where silicone
compounds, halides, high-concentration sulfides, or high-concentration solvent gases are present,
sensor life may be reduced, sensitivity to combustible gases may deteriorate, and accurate readings
may not be obtained.
If use in such environments is unavoidable, use for the shortest possible time and allow the product tosuck in clean air afterward. Confirm that the reading returns to normal and is stabilized.
 An oxygen concentration of at least 10 vol% is required in order for the new ceramic type combustible
gas sensor (%LEL) in the product to accurately measure gases and display concentrations.
 Due to the sensor characteristics, an accurate reading may not be displayed immediately after turningon the power. Allow the product to warm up for at least one minute after turning on the power to allow
the reading to stabilize before use. Allow the product to warm up for at least 10 minutes after turningon the power before performing gas adjustment.
 The reading of the carbon monoxide sensor may rise if exposed to high concentrations of volatileorganic compounds (VOCs). If the reading rises and will not return, the activated carbon filter in the
carbon monoxide sensor must be replaced. For information on activated carbon filter replacement,
contact RIKEN KEIKI.
 The zero point for carbon monoxide and hydrogen sulfide sensors may fluctuate at low or hightemperatures. If this occurs, perform fresh air adjustment in the ambient atmosphere.

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2. Important Safety Information

2-3 Precautions

 The hydrogen sulfide sensor may exhibit temporary fluctuations if exposed to sudden temperature
variations. Allow the product to stand and acclimatize in the ambient atmosphere.
 If the VOC sensor is exposed to high concentrations of methane (CH4), ethane (C2H6), propane (C3H8),or other gases, [----] may appear on the concentration display, the lamps may flash, and the buzzer
may sound, temporarily disabling measurement. In environments where these gases are present, even
if the concentration display does not indicate [----], be aware that the VOC concentration may not be
accurately measured.
Note that, even if the VOC sensor concentration display indicates [----], other unaffected sensors cancontinue measurement.
<Example interference gases causing [----] to be displayed on the VOC sensor concentration display>
Interference gas

Concentration

Methane (CH4)

6 vol% or more

Ethane (C2H6)

80 vol% or more

Propane (C3H8)

90 vol% or more

Battery replacement
 Be sure to turn off the power for the product before replacing the batteries.
 When replacing the batteries, replace all six with new batteries at the same time.
 The following batteries must be used to ensure that the product meets explosion-proof standards.
(Applies only when using the dry battery unit)
Japan Ex model:
Toshiba AA alkaline battery (LR6) ×6
ATEX/IECEx model: Toshiba AA alkaline battery (LR6) ×6 or Duracell (MN1500) ×6
 Note the polarity of the batteries.
Usage
 The operating time will be reduced due to battery performance in cold environments.
 The response of the LCD display may slow at low temperatures.
 Always perform fresh air adjustment under conditions of pressure, temperature, and humidity similar to
those in the operating environment and in clean air.
 Wait for the reading to stabilize before performing fresh air adjustment.
 If there is a temperature difference of 15 °C or more between the storage and usage locations, turn on
the power and allow the product to stand for about 10 minutes in a similar environment to the usage
location to acclimatize before performing fresh air adjustment in clean air.
 Do not use water or organic solvents such as alcohol or benzine when wiping the product. Doing so
may discolor or damage the surfaces of the product.
 Even if the product is not used for extended periods, turn the power on at least once every six months
to check pump suction (by running the product for approximately three minutes). Grease inside thepump motor may solidify and prevent operation if the product is not operated for extended periods.
 After a period of extended storage, be sure to perform fresh air adjustment before resuming use. For
information on readjustment including fresh air adjustment, contact RIKEN KEIKI.

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2. Important Safety Information

2-3 Precautions

 Do not use the product in locations where the following miscellaneous gases are present:<Gases affecting sensor sensitivity>
Sensor type

Miscellaneous gas type

NCF sensor(New ceramic type)・ Organic silicone gases such as D4 siloxane and D5 siloxane, andsulfur gases such as SOx and hydrogen sulfide (H2S) at
concentrations exceeding the detection range of the sensors installed
together・ Polymer substances such as ethylene oxide (C2H4O), acrylonitrile(C3H3N), butadiene (C4H6), and styrene (C8H8)・ Catalyst poisons such as phosphorous compounds, halogenatedhydrocarbon, and metallic vapors* The extent of the effect depends on the sensor model.

TEF sensor(Thermal conductivity type)

N/A

IRF sensor(Non-dispersive infrared type
(NDIR))

N/A

ESF/ESR sensor(Electrochemical type)

Differs depending on sensor.

<Sensor-corroding gases>
Sensor type

Miscellaneous gas type

NCF sensor(New ceramic type)

Corrosive gases such as SOx and NOx and acidic gases such ashydrogen fluoride (HF) and hydrogen chloride (HCl)TEF sensor(Thermal conductivity type)High-concentration organic gases and high-concentration alcohol(C2H6O)IRF sensor(Non-dispersive infrared type
(NDIR))

Corrosive gases such as SOx and NOx and acidic gases such ashydrogen fluoride (HF) and hydrogen chloride (HCl)ESF/ESR sensor(Electrochemical type)

N/A Take care when installing the product in locations where the following interference gases are present.
Sensor type

Miscellaneous gas type

NCF sensor(New ceramic type)Hydrocarbons, alcohols (C2H6O), and organic solvents, etc., other than
the target gas

TEF sensor(Thermal conductivity type)

Organic gases, alcohols (C2H6O), carbon dioxide (CO2), argon (Ar)IRF sensor(Non-dispersive infrared type
(NDIR))

Combustible gas sensor: Hydrocarbons, alcohols (C2H6O), organic
solvents, and water (H2O), etc. other than the target gas
Carbon dioxide sensor: High-concentration carbon monoxide (CO),nitrous oxide (N2O), and nitrogen monoxide (NO), etc.

ESF/ESR sensor(Electrochemical type)

Differs depending on sensor.

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2. Important Safety Information

2-4 Safety information

2-4 Safety information<Product overview>
This product is a suction-type portable gas detector. It can measure up to six different gas types. When thegas concentration exceeds the alarm point, an LCD display, LED and piezoelectric buzzer will be activatedto alert.
Up to 3 R-sensors for the measurement of O2, H2S, and CO as well as a maximum of 3 F-sensors out of 5 tomeasure Combustible gases, Toxic gases, CO2 and VOC can be mounted.
F-sensor will internally process as far as concentration calculation, and transmit digital data for gas
concentration to the main CPU.
Sampling of gas is done by the pump installed within the device. The GX-9000 has one built-in pump to
perform simultaneous measurement using all sensors installed in the product. The GX-9000H is internallydivided into two systems to manually switch between two pumps depending on the target gas.

<Power source>
 Either lithium-ion battery unit “BUL-9000” or alkaline battery unit “BUD-9000” can be installed into
GX-9000.
 BUL-9000 is specified for chargeable lithium-ion batteries. Uses three Panasonic NCR18650GA batteriesarranged in parallel.
 BUD-9000 is specified to use dry batteries. Japan Ex models can use six LR6 batteries manufactured by
Toshiba. ATEX/IECEx models can use either six LR6 batteries manufactured by Toshiba or six MN1500
batteries manufactured by Duracell. Six batteries are used with two sets of three arranged in parallel.
 Since these 2 kinds of batteries differ in the increase of temperature when shorted, their temperature
ranges and classes also differ.
 Structure of battery unit allows end users to replace batteries by themselves.
 The battery should be charged with the dedicated AC adapter or by power from IEC60950-certified SELV
power source, or IEC62368-1-certified ES1 power source. The maximum voltage from the charger shallnot exceed 5.7 Vdc.
 It is also possible to perform USB data communication with a PC that meets the above requirements.
 Batteries should only be charged and replaced in non-hazardous locations.
 Backup battery type CR1220 manufactured by Maxell.

<Japan Ex models>Ex codeMain unit:
BUL-9000 lithium ion battery unit:
BUD-9000 dry battery unit:

Ex da ia IIC T4 Ga (with combustible gas sensor NCF-6322)
Ex ia IIC T4 Ga (without combustible gas sensor NCF-6322)
Ex ia IIC T4 Ga
Ex ia IIC T4 Ga

Explosion-proofing guideline compliance
Main unit:

BUL-9000 lithium ion battery unit:
BUD-9000 dry battery unit:

JNIOSH-TR-46-1:2020
JNIOSH-TR-46-2:2018
JNIOSH-TR-46-6:2015
JNIOSH-TR-46-1:2020
JNIOSH-TR-46-6:2015
JNIOSH-TR-46-1:2020
JNIOSH-TR-46-6:2015

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2. Important Safety Information

2-4 Safety information

Battery unit ratings
BUL-9000 lithium ion battery unit:
BUD-9000 dry battery unit:

Power supply: 3.7 V DC, 250 mA
Power supply: 4.5 V DC, 250 mA (Toshiba LR6 batteries × 6)

Ambient temperature
Ambient temperature*:-40 °C to +60 °C* Ambient temperature refers to the temperature range in which the explosion-proof performance can be
maintained. It does not refer to the temperature range in which product performance is guaranteed.
For information on the operating temperature range, refer to ‘11-1 Product specifications’ and ‘11-2
Sensor specifications’.

<ATEX/IECEx models>Ex codeAmbient temperature

NC-6322*

Battery type

-40 °C ≤ Ta ≤ +60 °C

YES

BUL-9000-40 °C ≤ Ta ≤ +60 °C

NO

BUL-9000-40 °C ≤ Ta ≤ +60 °C

YES

BUD-9000
LR6 (Toshiba)-40 °C ≤ Ta ≤ +60 °C

NO

BUD-9000
LR6 (Toshiba)-40 °C ≤ Ta ≤ +40 °C

YES

BUD-9000
MN1500 (Duracell)-40 °C ≤ Ta ≤ +40 °C

NO

BUD-9000
MN1500 (Duracell)-40 °C ≤ Ta ≤ +60 °C

YES

BUD-9000
MN1500 (Duracell)-40 °C ≤ Ta ≤ +60 °C

NO

BUD-9000
MN1500 (Duracell)

Ex da ia IIC T4 Ga
II 1 G Ex da ia IIC T4 Ga
Ex ia IIC T4 Ga
II 1 G Ex ia IIC T4 Ga
Ex da ia IIC T4 Ga
II 1 G Ex da ia IIC T4 Ga
Ex ia IIC T4 Ga
II 1 G Ex ia IIC T4 Ga
Ex da ia IIC T4 Ga
II 1 G Ex da ia IIC T4 Ga
Ex ia IIC T4 Ga
II 1 G Ex ia IIC T4 Ga
Ex da ia IIC T3 Ga
II 1 G Ex da ia IIC T3 Ga
Ex ia IIC T3 Ga
II 1 G Ex ia IIC T3 Ga* NC-6322 is a new ceramic type sensor.

Certificate numbers
 IECEx ：IECEx DEK 21.0057X
 ATEX ：DEKRA 21 ATEX 0089X

Applicable standards
 IEC 60079-0:2017
 IEC 60079-1:2014-06
 IEC 60079-11:2011･ EN IEC 60079-0:2018･ EN 60079-1:2014･ EN 60079-11:2012

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2. Important Safety Information

2-4 Safety information

WARNINGFor GX-9000 / GX-9000H
 Do not attempt to disassemble or modify the instrument.
 The combustible gas sensor (NC-6322) measures %LEL. It is installed only on products with flameproof construction.
 The product is explosion-proof. With the exception of specified components, it cannot be disassembled
or modified.
 NC-6322 must not be exposed to ultraviolet light.
 This product integrates a sensor having flameproof construction. If assembly is not performed as
specified, explosion protection performance will be compromised. When replacing the sensor and filter,
properly install genuine parts and torque to specification.
 If the enclosure is damaged it shall be repaired before further use.
 The Sensor shall not be exposed to ultraviolet light or used in equipment in which it is not fully
enclosed.

For GX-9000 / GX-9000H with BUL-9000
 Do not charge in a hazardous location.
 Do not charge the unit with a non-genuine charger.
 Do not replace battery unit in a hazardous location.
 When connecting to a PC via USB, the PC must be connected using an IEC 60950-certified SELV
power source, or IEC 62368-1-certified ES1 power source. The maximum voltage from the PC shallnot exceed 5.7 Vdc.

For GX-9000 / GX-9000H with BUD-9000
 Do not replace battery unit in a hazardous location.
 Do not replace dry batteries in a hazardous location.
 With Japan Ex models, always use alkaline AA batteries (type LR6 manufactured by Toshiba). With
ATEX/IECEx models, always use alkaline AA batteries (type LR6 manufactured by Toshiba or type
MN1500 manufactured by Duracell).
 When connecting to a PC via USB, the PC must be connected to IEC 60950-certified SELV powersource, or IEC 62368-1-certified ES1 power source. The maximum voltage from the PC shall not
exceed 5.7 Vdc.

Product code
INST. No. 0 0 000 0000 00
A B C
D
E
A: Year of manufacture (0 to 9)
B: Month of manufacture (1 to 9 for Jan. to Sep.; XYZ for Oct., Nov., Dec.)
C: Manufacturing lot
D: Serial number
E: Factory codes

2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan
Phone: +81-3-3966-1113
Fax: +81-3-3558-9110
E-mail: intdept@rikenkeiki.co.jp
Website: https://www.rikenkeiki.co.jp

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3. Product Configuration

3-1 Main unit and accessories

3

Product Configuration
3-1 Main unit and accessories
Open the box and packaging and inspect the main unit and accessories.
If any accessories or parts are missing, contact RIKEN KEIKI.

3-1-1 Main unit
For detailed information on the names and functions of product parts and the LCD display, refer to ‘3-2 Part
names and functions’.

<GX-9000>

Main
unit

Battery unit

<GX-9000H>

Main
unit

Battery unit

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3. Product Configuration

3-1 Main unit and accessories

3-1-2 Accessories
Part nameGas
sampling
tube

Remarks

Gas sampling rod/gas sampling tube
(approx. 75 cm)

Part Nos.:
0904 0275 00 (Gas sampling rod)
0914 0135 30 (Gas sampling tube)

Shoulder strap

Part No.: 4777 4592 10

AC adapter

Provided with lithium ion battery unit
(BUL-9000)
Part No.: 2594 1342 30

Adapter plug
(EU/Type C)

Provided with lithium ion battery unit
(BUL-9000) of ATEX/IECEx modelPart No.: 2594 1435 00

AA alkaline batteries(×6)

Provided with dry battery unit (BUD-9000)
Part No.: 2753 3007 80

CO2 removal filter
CF-284

Provided when carbon dioxide sensor isinstalled Used for CO2 zero adjustment
Part No.: 4383 0390 80

Activated carbon filter
CF-8350

Provided when VOC sensor is installed
Used for fresh air adjustment
Part No.: 4383 9299 50

Filter cylinder
retaining belt forshoulder strap

Provided with CO2 removal filter CF-284 andactivated carbon filter CF-8350
Allows attachment of the filter above to theshoulder strap.
Part No.: 4777 4572 20

Gas sampling rod

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3-1 Main unit and accessories

3-1-3 Optional accessories
Part name

Remarks

Dry battery unit
(BUD-9000)

Lithium ion battery
unit (BUL-9000)

Either the dry battery unit or lithium ion
battery is provided, but additional units canbe purchased separately.
Part No.:4777 0270 80 (BUD-9000)
Part No.:4777 0260 90 (BUL-9000)

Sampling tube withfloat (8 m/30 m/45 m)

The waterproof filter inside the float
separates water to allow gas detection.
Part No.:4384 0430 60 (8 m tube)
Part No.:4775 9678 80 (30 m tube)
Part No.:4777 9567 60 (45 m tube)

Sampling tube withweight(30 m/45 m)

Includes a weight on the end to make iteasier to lower the tube.
Part No.:4775 9679 50 (30 m tube)
Part No.:4777 9465 80 (45 m tube)

Absorbent cotton
filter CF-8385/
Connecting tube

Tube for connecting the waterproof filter tothe gas detector. This is recommended fordusty environments, as the IRF sensor issusceptible to the effects of dust.
Due to the risk of adsorption, avoid use
when the ESF sensor (except for H2S (highconcentrations)) or VOC sensor is installed .
Part Nos.:
4383 0850 00 (CF-8385)
4775 9617 60 (Connecting tube)
1879 0011 10 (Replacement absorbent
cotton)―Filter unit
(CF-A13i)
Set of 5

Internal interference gas removal filter usedwith the hydrogen sulfide sensor (ESR-A13i)
Part No.: 4777 9317 30―

Filter unit
(CF-A1CP)Set of 5

Internal interference gas removal filter usedwith the carbon monoxide sensor (ESR-A13P)
Part No.: 4777 9316 60

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3. Product Configuration

3-1 Main unit and accessories

Part name

Remarks
Filter cylinder
retaining belt

Used to attach CF-8385 absorbent cotton
filter to the gas detector
Part No.: 4777 9444 20

Waist belt/
Waist belt attachment

Allows the gas detector to be worn at the
waist.
Use with the shoulder strap isrecommended to avoid dropping the gas
detector.
Part Nos.:
4775 5653 40 (Waist belt)
4775 9853 10 (Waist belt attachment)

Leather caseProtects the main unit against dirt.
Also allows attachment of the shoulder
strap, waist belt, and absorbent cotton filter.
Part No.: 4777 4593 80

Sampling rod holder

Attached to the shoulder strap; allows
storage of the gas sampling rod tip.
Part No.: 4775 5651 00

Water trap

Connects between the sampling tube andgas detector to eliminate any water.
Part No.: 0904 0186 20

Gas sampling bag

Part Nos.:
0904 0103 80 (1 L (green))0904 0104 50 (1 L (orange))
0904 0288 10 (2 L (black))

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3. Product Configuration

3-1 Main unit and accessories

Part name

Remarks

Calibration gas can(Content: 5 L/
can volume: 0.6 L)

Part Nos.:
1875 9110 70(Nitrogen (N2): 99.99 vol% or greater)
1875 9056 30(Methane (CH4): 50 %LEL, air balance)
1875 9107 90(Isobutane (HC (i-C4H10)): 50 %LEL, airbalance)
1875 9104 70(Isobutane (HC (i-C4H10)): 10 vol%, N2
balance)
1875 9143 60(Methane (CH4): 50 vol%, N2 balance)
1875 9058 80(Methane (CH4): 70 %LEL, N2 balance)
1875 9057 10(Methane (CH4): 70 vol%, N2 balance)
1875 9065 50(Carbon monoxide (CO): 145 ± 5 ppm, N2
balance)
1875 9076 10(Carbon dioxide (CO2): 10 vol%, N2
balance)

Flow indicator withneedle valve

Used to extract gas from the calibration gas
canPart No.: 1621 1901 70

Gas cylinder(Content: 34 L,
approx. 270 (H) x
79.3 (W) mm)

Part Nos.:
9650 3209 90(Hydrogen sulfide (H2S): 25 ppm,
carbon monoxide (CO): 50 ppm,
methane (CH4): 50 %LEL,
oxygen (O2): 12 vol%)9650 3213 40(Hydrogen sulfide (H2S): 25 ppm,
carbon monoxide (CO): 50 ppm,
isobutane (HC (i-C4H10)): 50 %LEL,
oxygen (O2): 12 vol%)Demand flow valve/
10 cm connection
tube

Used to extract gas from the gas cylinder
Part Nos.:
1641 0190 20 (Demand flow valve)4775 5958 10 (10 cm connection tube)

Adapter plug
(AU/Type O)

Part No.: 2594 1434 20

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3. Product Configuration

3-1 Main unit and accessories

Part name

Remarks

Adapter plug
(UK/Type BF)

Part No.: 2594 1436 70

LCD protective film
Set of 5

Part No.: 4777 9025 70

Aluminum storage
case

Dimensions:
Approx. 365 (W)  236 (H)  226 (D) mm
Part No.: 4777 9579 00* Excluding projections

Diluter

Dilutes the gas drawn in with air to a 1:1
ratio, allowing use of even new ceramic typesensors in inert gas in which they typicallycannot be used.
Cannot be used for high-concentration
combustible gases due to the risk of
explosion.
Part No.: 4775 9934 30

Gas sampling rod/Gas sampling coiled
tube (1 m)Part Nos.:
0904 0275 00 (Gas sampling rod)
0914 0072 40 (Gas sampling coiled tube)

Data logger
management
programPart Nos.:
9811 0980 90 (Japan Ex model)
9811 0990 80 (ATEX/IECEx model)

USB interface cable

Used for interfacing with the PC on which
the data logger management program andsetup program are installed.
Part No.: 2440 2728 90

Gassampling rod

Gas sampling coiled tube

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3-1 Main unit and accessories

Part name―

Remarks
Hydrogen sulfide
calibration gas kit(CK-82)Adjust using ampule.
Part No.: 4395 0320 60

CAUTION Use the sampling tube with weight in conjunction with the CF-8385 absorbent cotton filter.
The CF-8385 absorbent cotton filter is used to remove dust and protect against water. When using thesampling tube with weight, the filter cylinder retaining belt and connecting tube must also be used. Ifwater is sucked in without using the CF-8385 absorbent cotton filter, water will get inside the main unit,
causing it to fail.
 If the separately sold sampling tube with float or weight is used when measuring highly adsorptive gas,
the gas may be adsorbed inside the tube, resulting in a lower concentration reading than the actual
concentration of the detection target gas at the measurement point.
 The CF-8385 absorbent cotton filter is recommended for dusty environments, as the IRF sensor issusceptible to the effects of dust.
 Do not use the separately sold tubes or filters when the ESF sensor (except for the ESF-A24R2 (highconcentration H2S)) or VOC sensor is installed, due to the risk of adsorption, even when recommended
above.

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3. Product Configuration

3-2 Part names and functions

3-2 Part names and functions
3-2-1 Main unit and battery unit
<GX-9000/GX-9000H>
1

2
3

5

4
<GX-9000><GX-9000H>

6

6

No.

Name

Functions1

Control panel

Contains the buttons and LCD for operating the product.

2

Gas inlet (GAS IN)

Draws in the gas. Connect a tube and attach the provided gas sampling rod.

3

Battery unit

The lithium ion battery unit (BUL-9000) or dry battery unit (BUD-9000) thatpowers the product.

4

Jack cover

Cover for the AC adapter and USB cable connector
Detach the cover to connect the AC adapter to charge when using thelithium ion battery unit (BUL-9000).
Connect a USB cable to connect to a PC.

5

Charging indicator lamp
(BUL-9000 only)

Lights up in red when charging, and lights up green when charging iscomplete.
Lights up in orange when charging while connected to the PC.

6

Gas outlet (GAS OUT)

Discharges the gas drawn in. (Do not block.)

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3-2 Part names and functions

CAUTION Do not prod the buzzer sound opening with sharp objects. Doing so may result in ingress of water or
foreign matter, resulting in malfunctions or damage to the product.
 Do not remove the panel sheet on the surface. Doing so will impair dustproof and waterproof
performance.
 Do not block the buzzer sound opening with tape or other objects. This will prevent adjustment of theinternal pressure of the product, which may result in malfunctions.

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3-2 Part names and functions

3-2-2 Control panel<GX-9000>
2

No.

1

3
4

7

5

8

6

9

Name

Functions

1

Alarm LED array (top)The lamps flash red when an alarm occurs.

2

LCD display

Displays information such as gas type and gas concentration.

3

Alarm LED array (left)

The lamps flash red when an alarm occurs and measurement is notunderway.

4

Buzzer sound opening

Emits operating and alarm sounds.
(Do not block.)5▲/AIR button

Performs fresh air adjustment in measurement mode.
Used to select items and adjust numerical values (up) in display modeand user mode.

6

RESET/▼ button

Turns the pump on and off in measurement mode. Also resets alarms.
Used to select items and adjust numerical values (down) in display
mode and user mode.

7

Alarm LED array (right)

The lamps flash red when an alarm occurs and measurement is notunderway (when power is turned on and in user mode).

8

DISP/ESC button

Selects display mode.
Selects display items in display mode.

9

POWER/ENTER button

Turns the power on and off.
Used in user mode to confirm values or make settings.

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3. Product Configuration

3-2 Part names and functions<GX-9000H>
2

No.
1

1

3
4

7

5

8

6

9

Name

Functions

Alarm LED array

The lamps flash red when an alarm occurs.

2

LCD display

Displays information such as gas type and gas concentration.

3

H2S low concentration
measurement mode
selection indicator lamps

The lamps light up green when H2S low concentration
measurement mode is selected.

Alarm LED array (left)

The lamps flash red when an alarm occurs and measurement is notunderway.

Buzzer sound opening

Emits operating and alarm sounds.
(Do not block.)5▲/AIR button

Performs fresh air adjustment in measurement mode.
Used to select items and adjust numerical values (up) in display
mode and user mode.
Press the ▲/AIR and RESET/▼ buttons simultaneously to toggle
between H2S high concentration measurement mode and H2S low
concentration measurement mode.

6

RESET/▼ button

Turns the pump on and off in measurement mode. Also resets
alarms.
Used to select items and adjust numerical values (down) in display
mode and user mode.

7

H2S high concentration
measurement mode
selection indicator lamps

The lamps light up green when H2S high concentration
measurement mode is selected.

Alarm LED array (right)

The lamps flash red when an alarm occurs and measurement is notunderway (when power is turned on and in user mode).

8

DISP/ESC button

Selects display mode.
Selects the display in display mode.

9

POWER/ENTER button

Turns the power on and off.
Used in user mode to confirm values or make settings.

4

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3. Product Configuration

3-2 Part names and functions

3-2-3 LCD display<GX-9000>1 2 3

45 6 7 8

9
10
11

12

<GX-9000H><H2S high concentration measurement mode>

1 2 3

4

<H2S low concentration measurement mode>

1 2 3

5 6 7 8

9
10
11

12

4

5 6 7 8

9
10
11

12

13

13
No.

Name

Functions1

Operating status icon

Indicates the operating status in measurement mode. Blinks when normal.

2

Bump test expiration
icon

Displayed until the bump test expiration date when the bump test
expiration display setting is enabled.

3

Flow confirmation icon

Indicates the gas suction status in measurement mode.
The icon rotates when normal.

4

Gas alarm function off
display

Displayed when the gas alarm function is turned off.
Alarms will not operate when the gas alarm function is turned off.

5

Clock display

Displays the current time.

6

Buzzer volume icon

Indicates the buzzer volume.

7

Bluetooth icon

Displayed when the Bluetooth function is turned on.

8

Battery level icon

Indicates battery levels.

9

Gas name display

Displays the target gas names.
The gas names displayed will vary depending on the sensors installed.

10

Gas concentration
display11

Gas concentration bar
display

The (full scale) measurement range is segmented to indicate gas
concentrations as bars. It indicates concentrations as ratios of the fullscale.

12

Units display

Displays units (ppm, ppb, vol%, %, %LEL) according to the sensor
specifications.

13

H2S measurement mode
display (GX-9000H)

Displays the H2S measurement mode during measurement.
[H2S HIGH] is displayed for H2S high concentration measurement mode.
[H2S LOW] is displayed for H2S low concentration measurement mode.

Displays the measured gas concentration.

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3. Product Configuration

3-2 Part names and functions

NOTE Approximate battery levels are indicated as follows:: Sufficient: Low: Needs charging (replace the batteries).
The battery level icon will blink if the battery level drops even further. The LEDs and buzzer operate
every four seconds to alert the user.
 The buzzer volume icon indicates as follows:: High volume: Low volume
 When both NCF and TEF sensors are installed, concentrations are displayed for only one of thesensors (which sensor depends on factors such as the detected concentrations). [----] or [OFF] will be
displayed on the concentration display for the sensor for which concentrations are not displayed.
(Refer to ‘6-4-1 Setting the NCF/TEF sensor range’.)35/204

4. Alarm Functions

4-1 Gas alarm types

4

Alarm Functions
4-1 Gas alarm types
A gas alarm is triggered instantaneously when the concentration of the measured gas reaches or exceeds
the alarm setpoints shown in the following table. (Self-latching)Gas alarm types include the first alarm (WARNING), second alarm (ALARM), TWA alarm, STEL alarm,
OVER alarm (over scale), and M OVER alarm (negative sensor failure).
Gas alarms are prioritized as follows:First alarm < second alarm < M OVER alarm < OVER alarm < TWA alarm < STEL alarm

4-2 Gas alarm setpoints
The default settings for gas alarm setpoints are as shown in the following table:<Combustible gas (New ceramic type sensor)>
Hydrogen
H2

Methane
CH4

Isobutane
HC (i-C4H10)

Explosion-proof
specifications

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Display range

0 – 100 %LEL

0 – 100 %LEL

0 – 100 %LEL

0 – 100 %LEL

Detection range

0 – 100 %LEL

0 – 100 %LEL

0 – 100 %LEL

0 – 100 %LEL

1 %LEL

1 %LEL

1 %LEL

1 %LELFirst alarm

10 %LEL

10 %LEL

10 %LEL

10 %LEL

Second alarm

Item

Detection
target gas

Sensor model

Resolution

Alarm
setpoints

Acetylene
C2H2

NCF-6322P

50 %LEL

50 %LEL

50 %LEL

50 %LEL

TWA

-

-

-

-

STEL

-

-

-

-

OVER

100 %LEL

100 %LEL

100 %LEL

100 %LELM OVER-10 %LEL-10 %LEL-10 %LEL-10 %LEL

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4. Alarm Functions

4-2 Gas alarm setpoints<Combustible gas (Thermal conductivity type sensor)>
Hydrogen
H2

Methane
CH4

Isobutane
HC (i-C4H10)

Explosion-proof specifications

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Display range

0 – 100.0 vol%0 – 100.0 vol%0 – 100.0 vol%Detection range

0 – 100.0 vol%0 – 100.0 vol%0 – 100.0 vol%0.1 vol%

0.1 vol%

0.1 vol%First alarm

25.0 vol%25.0 vol%25.0 vol%Second alarm

Detection
target gas

Item
Sensor model

TEF-7520P

Resolution

Alarm
setpoints

50.0 vol%50.0 vol%50.0 vol%

TWA

-

-

-

STEL

-

-

-

OVER

100.0 vol%100.0 vol%100.0 vol%M OVER-10.0 vol%-10.0 vol%-10.0 vol%<Combustible gas (Non-dispersive infrared type sensors)>
Detection
MethaneItemtarget gas
CH4
Sensor model

Isobutane
HC (i-C4H10)

IRF-4341

IRF-4345

Explosion-proof specifications

Japan Ex and ATEX/IECEx

Japan Ex and ATEX/IECEx

Display range

0 – 100.0 %LEL/
100.0 %LEL – 100.0 vol%0 – 100.0 %LEL/
100.0 %LEL – 100.0 vol%Detection range

0 – 100.0 %LEL/
100.0 %LEL – 100.0 vol%0 – 100.0 %LEL/
100.0 %LEL – 100.0 vol%Resolution

Alarm
setpoints

0.5 %LEL/0.1 vol%0.5 %LEL/0.1 vol%First alarm

10.0 %LEL

10.0 %LEL

Second alarm

50.0 %LEL

50.0 %LEL

TWA

-

-

STEL

-

-

OVER

100.0 vol%100.0 vol%M OVER-5.0 %LEL-5.0 %LEL

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4. Alarm Functions

4-2 Gas alarm setpoints<Carbon dioxide (Non-dispersive infrared type sensor)>
DetectionItemtarget gas
Sensor modelIRF-4443

Explosion-proof specifications

Japan Ex and ATEX/IECEx

Display range

0 – 20.00 vol%Detection range

0 – 20.00 vol%0.01 vol% (0 – 5 vol%)0.10 vol% (5 – 20 vol%)Resolution

Alarm
setpoints

Carbon dioxide
CO2First alarm

5.00 vol%Second alarm

10.00 vol%

TWA

-

STEL

-

OVER

20.00 vol%M OVER-1.00 vol%<Oxygen (Electrochemical type sensor)>
DetectionItemtarget gas

OxygenO2

Sensor model

ESR-X13P

Explosion-proof specifications

Japan ExATEX/IECEx

Display range

0 – 40.0 %0 – 40.0 %Detection range

0 – 25.0 %0 – 25.0 %Resolution

Alarm
setpoints

0.1 %

0.1 %

First alarm

18.0 %

19.5 %

Second alarm

25.0 %

23.5 %

TWA

-

-

STEL

-

-

OVER

40.0 %

40.0 %M OVER-1.0 %-1.0 %<Hydrogen sulfide (Electrochemical type sensor)>
DetectionItemtarget gas

Hydrogen sulfide
H2S (low concentration)

Sensor model

ESR-A13i

Explosion-proof specifications

Japan ExATEX/IECEx

Display range

0 – 200.0 ppm

0 – 200.0 ppm

Detection range

0 – 30.0 ppm

0 – 100.0 ppm

Resolution

Alarm
setpoints

0.1 ppm

0.1 ppm

First alarm

1.0 ppm

5.0 ppm

Second alarm

10.0 ppm

30.0 ppm

TWA

1.0 ppm

1.0 ppm

STEL

5.0 ppm

5.0 ppm

OVER

200.0 ppm

200.0 ppm

M OVER-10 ppm-10 ppm

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4. Alarm Functions

4-2 Gas alarm setpoints<Carbon monoxide (Electrochemical type sensor)>
DetectionItemtarget gas

Carbon monoxide
CO

Sensor model

ESR-A13P

Explosion-proof
specifications

Japan ExATEX/IECEx

Display range

0 – 2,000 ppm

0 – 2,000 ppm

Detection range

0 – 500 ppm

0 – 500 ppm

Resolution

Alarm
setpoints

1 ppm

1 ppm

First alarm

25 ppm25 ppmSecond alarm

50 ppm50 ppmTWA

25 ppm25 ppm

STEL

200 ppm

200 ppm

OVER

2,000 ppm

2,000 ppm

M OVER-50 ppm-50 ppm<Hydrogen sulfide (Electrochemical type sensor)>
DetectionItemtarget gas

Hydrogen sulfide
H2S (high concentration)

Sensor model

ESF-A24R2

Explosion-proof specifications

Japan Ex and ATEX/IECEx

Display range

0 – 1,000 ppm

Detection range

0 – 1,000 ppm

Resolution

Alarm
setpoints

1 ppm
First alarm

1,000 ppm

Second alarm

1,000 ppm

TWA

OFF

STEL

OFF

OVER

1,000 ppm

M OVER-100 ppm

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4. Alarm Functions

4-2 Gas alarm setpoints<Toxic gas (Electrochemical type sensors)>
Detection
target gas

Item

Ammonia
NH3

Chlorine
Cl2

Ozone
O3

Sensor model

ESF-B242

ESF-C930

ESF-B249

Explosion-proof
specifications

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Display range

0 – 75.0 ppm

0 – 1.50 ppm

0 – 0.600 ppm

Detection range

0 – 75.0 ppm

0 – 1.50 ppm

0 – 0.600 ppm

0.5 ppm

0.01 ppm

0.005 ppm

25.0 ppm

0.50 ppm

0.100 ppm

Resolution
First alarm
Alarm
setpoints

Second alarm

50.0 ppm

1.00 ppm

0.200 ppm

TWA

25.0 ppm

0.50 ppm

0.100 ppm

STEL

35.0 ppm

1.00 ppm

OFF

OVER

75.0 ppm

1.50 ppm

0.600 ppm

M OVER-10.0 ppm

-0.15 ppm

-0.060 ppm

Hydrogen chloride
HCl

Sulfur dioxide
SO2Hydrogen cyanide
HCN*

Detection
target gas

Item
Sensor model

ESF-A24E2

ESF-A24D4

ESF-A24D

Explosion-proof
specifications

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Japan Ex

Display range

0 – 6.00 ppm

0 – 100.0 ppm

0 – 15.0 ppm

Detection range

0 – 6.00 ppm

0 – 100.0 ppm

0 – 15.0 ppm

0.05 ppm

0.1 ppm

0.1 ppm

First alarm

2.00 ppm

2.0 ppm

5.0 ppm

Second alarm

10.0 ppm

Resolution

Alarm
setpoints

4.00 ppm

5.0 ppm

TWA

OFF

2.0 ppm

OFF

STEL

OFF

5.0 ppm

4.7 ppm

OVER

6.00 ppm

100.0 ppm

15.0 ppm

M OVER-0.60 ppm

-10.0 ppm

-1.5 ppm* ATEX/IECEx models are not available. Cannot be installed for export outside Japan due to export restrictions.

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4. Alarm Functions

4-2 Gas alarm setpoints<Volatile organic compounds (Photo-ionization type (PID) sensors)>
Volatile organic
Volatile organic
Detection
Itemcompounds
compounds
target gas
VOCs
VOCs

Volatile organic
compounds
VOCs

Sensor model

PIF-001

PIF-002

Photo-ionization energy

10.6 eV

10.6 eV

10.0 eV

Explosion-proof
specifications

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Display range

0 – 40,000 ppb

0 – 4,000 ppm

0 – 100.0 ppm

Detection range

0 – 40,000 ppb

0 – 4,000 ppm

0 – 100.0 ppm

1 ppb (0 – 4,000 ppb)
0.1 ppm (0 – 400.0 ppm)
0.01 ppm (0 – 10.00 ppm)
10 ppb (4,000 – 40,000 ppb) 1 ppm (400.0 – 4,000 ppm) 0.1 ppm (10.00 – 100.0 ppm)

Resolution

Alarm
setpoints

PIF-003First alarm

5,000 ppb

400.0 ppm

5.00 ppm

Second alarm

10,000 ppb

1,000 ppm

10.0 ppm

TWA

OFF

OFF

OFF

STEL

OFF

OFF

OFF

OVER

40,000 ppb

4,000 ppm

100.0 ppm

M OVER-50,000 ppb-6,000 ppm-100 ppm

NOTE
 The alarm setpoints indicated for the first alarm (WARNING), second alarm (ALARM), TWA alarm,and STEL alarm in the table above can be changed (or disabled). However, the setpoint cannot bechanged for those shown as “-”. (Refer to ‘7-3-1 Setting alarm setpoints’.) The M OVER alarm (negative sensor failure) occurs when the zero point drifts to the negative side.
 Gas concentrations are checked at one-second intervals to determine whether to issue an alarm.

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4. Alarm Functions

4-3 Gas alarm patterns

4-3 Gas alarm patterns<Gas alarm buzzer sounding and lamp flashing patterns>
If a gas alarm occurs, the user is notified by the buzzer sounding and the alarm LED array flashing.
The behavior differs depending on the type of alarm.
Alarm
SecondM OVER
First alarm
TWA alarm
STEL alarm
OVER alarm
type
alarm
alarm
Buzzersounding

Repeatedalternatingstrong andweak beeps
at about 1second
intervals“Beep, beep”

Repeatedalternatingstrong andweak beeps
at about 0.5second
intervals“Beep, beep,
beep, beep”

Repeatedalternatingstrong andweak beeps
at about 1second
intervals“Beep, beep”

Repeatedalternatingstrong andweak beeps
at about 1second
intervals“Beep, beep”

Repeatedalternatingstrong andweak beeps
at about 0.5second
intervals“Beep, beep,
beep, beep”

Repeatedintermittent
beeps atabout 1second
intervals“Beep, beep”

Alarm LEDarray
flashing

Repeated
flashing at
about 1second
intervals

Repeated
flashing at
about 0.5second
intervals

Repeated
flashing at
about 1second
intervals

Repeated
flashing at
about 1second
intervals

Repeated
flashing at
about 0.5second
intervals

Repeated
flashing at
about 1second
intervals<Alarm pattern (H-HH)>: 1-second interval: 0.5-second interval
Reset
Second alarm setpoint
Concentration

First alarm setpoint

Time

Alarm buzzer/lamps<Alarm pattern (L-LL)>: 1-second interval: 0.5-second interval
Reset

Concentration

First alarm setpoint
Second alarm setpoint

Time

Alarm buzzer/lamps

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4. Alarm Functions

4-3 Gas alarm patterns<Alarm pattern (L-H) (oxygen deficiency alarm)>: 1-second interval: 0.5-second interval
Reset

Reset

Concentration

Second alarm setpointFirst alarm setpoint

Time

Alarm buzzer/lamps

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4. Alarm Functions

4-3 Gas alarm patterns<Gas alarm display>
When a gas alarm occurs, the alarm type is indicated in the units display area of the LCD display, and thecorresponding gas concentration display blinks.
If the measurement range is exceeded (over scale), [OVER] appears alternately in the units display area,and [OVER] blinks in the gas concentration display area.
<Display example ([CH4]: First alarm triggered)><Display example ([CH4]: Over scale)>

Alarm typeFirst alarm

Second
alarm

TWA
alarm

STEL
alarm

OVER
alarm

M OVER
alarm

Units display area
indication

AL1

AL2

TWA

STEL

OVER

M OVERGas concentration
display area
indication

Blinking

Blinking

Blinking

Blinking

Blinking[OVER]

Blinking[-OVER]WARNING A gas alarm indicates the presence of extreme danger. The user must take appropriate action after
taking appropriate steps to ensure safety.

NOTE
 The alarm pattern can be checked by performing an alarm test at the alarm setpoint display in display

mode. Note, however, that the gas concentration display will not blink in alarm tests. (Refer to ‘8-4
Performing alarm tests’.) If self-latching is selected, the alarm is reset when the RESET/▼ button is pressed after the gas

concentration has returned to normal.
If auto reset is selected, the alarm is reset automatically once the gas concentration has returned tonormal.

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4. Alarm Functions

4-4 Fault alarm patterns

4-4 Fault alarm patterns
A fault alarm is triggered if an abnormality is detected in the product. (Self-latching)Fault alarm types include system, battery voltage, clock, sensor, and flow rate abnormalities.
If a fault alarm occurs, the user is notified by the buzzer sounding and alarm LED array flashing.
 Buzzer sounding: Repeated intermittent beeps at about 1-second intervals (“Beep-beep, beep-beep”)
 Alarm LED array flashing: Repeated flashing at about 1-second intervals
The following shows fault alarm display examples:<System abnormality><Clock abnormality><Flow rate abnormality><Sensor abnormality><Battery voltage abnormality>

CAUTION If a fault alarm occurs, determine the cause and take appropriate action.
If the problem lies with the product and the fault occurs repeatedly, contact RIKEN KEIKI immediately.

NOTE
 For more information on malfunctions (error messages), refer to ‘10 Troubleshooting’.
 Press the RESET/▼ button to reset the alarm.

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4. Alarm Functions

4-5 Outside operating temperature range warning

4-5 Outside operating temperature range warning
An outside operating temperature range warning occurs in the form of a temperature range error if the
product is used outside the continuous use environment operating temperature range (below -20 °C or
above 50 °C) for more than 20 minutes.
When a temperature range error occurs, either leave the product for 10 minutes or longer in the operating
temperature range, or turn off the power for the main unit.
If an outside operating temperature range warning occurs, the user is notified by the buzzer sounding andalarm lamp flashing.
Alarm typeOutside operating temperature range warning
Less than one hour outside range

BuzzerAlarm lamps

One hour or more outside range

Repeated intermittent beeps at about 5-second intervals: “Beep”
Repeated flashing at about 5-second intervals

LCD display

Reset

Press the RESET/▼ button.
However, the alarm will trigger automaticallyevery 20 minutes even after the reset.

Cannot be reset.

NOTE
 The outside operating temperature range warning occurs in measurement mode and display mode.

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5. Usage Instructions

5-1 Usage note

5

Usage Instructions
5-1 Usage note
Observe all usage precautions when using the product.
Ignoring these precautions may damage the product and prevent inaccurate gas concentration
measurement.
Check the following before starting gas concentration measurement: Confirm that the battery level is sufficient.
 Check to confirm that the gas sampling tube and connecting tube are not bent or damaged.
 Check to confirm that the filter inside the gas sampling rod is not contaminated or clogged.
 Check to confirm that the gas sampling rod and gas sampling tube are correctly connected to the main
unit.

NOTE
 If the settings for the product have been altered from an external device, be sure to confirm that thesettings have been altered correctly.
 Protective film is attached to the LCD display on the product to protect it against scratching during

shipping.
Be sure to peel off this protective film before using the product. Explosion-proofing cannot be
guaranteed if the protective film is left attached.

47/204

5. Usage Instructions

5-2 Removing and attaching the battery unit and charging

5-2 Removing and attaching the battery unit and charging
5-2-1 Removing and attaching the battery unit
Follow the procedure described below to remove and attach the lithium ion battery unit (BUL-9000) or dry
battery unit (BUD-9000).

DANGER The battery unit must be removed and attached only in a safe place.

CAUTION Be sure to turn off the power for the product before removing or attaching the battery unit.
 Do not touch the main unit connection terminals on the battery unit with bare hands. There is a risk ofcontact failure due to contamination or damage to internal components due to static electricity.
 Do not short-circuit the connection terminals with metal objects. The battery will overheat or the battery
level will drop sharply.
 If the battery unit retaining screws are not fully tightened, the battery unit may fall off or water may getin through the gaps. Water may also get in if minute foreign matter is trapped between the battery unit
and the main unit.
 Avoid damaging the rubber seal. To maintain dustproof and waterproof performance, we recommend
replacing the rubber seal every two years, regardless of condition.

NOTE
 The date and time setting may be reset if the battery unit is removed for extended periods.

1

Loosen the two battery unit retaining screws on theunderside of the battery unit.
<Lithium ion battery unit><Dry battery unit>

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5. Usage Instructions2

5-2 Removing and attaching the battery unit and charging

Remove the battery unit.

* The diagram shows the lithium ion
battery unit.

3

4

Main unit

Attach a new battery unit.
Note the connection terminals and protrusions toensure that the battery unit is attached in thecorrect orientation.

Battery unit

Tighten the two battery unit retaining screws
on the underside of the main unit.
Connection terminals

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5. Usage Instructions

5-2 Removing and attaching the battery unit and charging

5-2-2 Charging the lithium ion battery unit (BUL-9000)
When using the product for the first time or if the battery level is low, be sure to charge the lithium battery
unit using the dedicated AC adapter.

DANGER Charge the lithium ion battery unit only in a safe place.
 Be sure to use the dedicated AC adapter for charging.
 Charge the battery at an ambient temperature between 0 °C and +40 °C.

CAUTION Do not use the product while charging. Doing so will prevent correct measurement. This will also
hasten battery degradation and reduce battery life.
 The AC adapter is neither waterproof nor dustproof. Do not charge the battery while the main unit iswet.
 The AC adapter is not explosion-proof.
 Do not pull the jack cover with excessive force. Doing so may damage the jack cover.
 Do not use the product with the jack cover removed. Doing so may result in ingress of dust or waterand result in malfunctions. If the jack cover is damaged, replace with a new one.
 If the jack cover is not securely fitted, water may get inside. Water may also get in if minute foreign
matter is trapped beneath the jack cover and the product.
 Always unplug the AC adapter from the power outlet when not in use.

NOTE The lithium ion battery unit may get hot during charging. This is not an abnormality.
 Wait at least 10 minutes before use. The main unit will be hot immediately after charging. Using thelithium ion battery while it is still hot may prevent correct measurement.
 The battery cannot be recharged when fully charged.

1

Open the jack cover on the lithium ion battery unit.

2

Insert the AC adapter connection terminal into thecharging jack on the lithium ion battery unit.

3

Plug the AC adapter power plug into the power
outlet.
The charging indicator lamp lights up in green when the
AC adapter is connected. Charging begins after
approximately three seconds, and the lamp lights up in
red. (Full charge requires approximately eight hours at
maximum.)
Once charging is completed, the charging indicator
lamp lights up in green.

Charging
indicator
lamp
AC adapter
connection
terminal
Jack cover

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5. Usage Instructions

5-2 Removing and attaching the battery unit and charging

4

When charging is complete, unplug the AC adapter
from the power outlet.

5

Remove the AC adapter connection terminal fromthe lithium ion battery unit charging jack, then close
the jack cover.
Make sure the jack cover is pressed in securely.

Jack cover

WARNING When the product is connected to a PC via a USB cable, the charging indicator lamp lights up in green,slow charging starts after approximately 30 seconds, and the lamp lights up in orange.
Slow charging is auxiliary charging to maintain communication mode. Full charging is not possible. Do
not connect the product to a PC for the purpose of charging. Also, do not connect to a commerciallyavailable USB power supply.
 The AC adapter provided must be used to charge the product. Do not connect this adapter to asmartphone or other USB device.

NOTE Connect the product to a PC via a USB cable to use the product in communication mode.

Communication mode allows you to use the separately sold SW-9000 Series data logger
management program to load and use collected data on the PC.
 When using the lithium ion battery unit, slow charging is used to ensure stable performance incommunication mode.
 Do not charge continuously in slow charging mode. Be sure to unplug the USB cable after exiting
communication mode.

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5. Usage Instructions

5-2 Removing and attaching the battery unit and charging

5-2-3 Replacing the dry battery unit (BUD-9000)
When using the product for the first time or if the battery level is low, replace the batteries with new alkaline
AA batteries.

DANGER The product explosion-proof standards include the use of the specified dry batteries. When using as an
explosion-proof product, use six specified alkaline AA batteries.
 Be sure to use only the specified batteries.
 Be sure to replace the batteries only in a safe place.

CAUTION
Battery replacement
 Be sure to turn off the power for the product before replacing the batteries.
 Note the polarity when inserting new batteries.
 If the battery cover retaining screw is not fully tightened, the dry batteries may fall out, or water may
get in through the gaps. Water may also get in if minute foreign matter is trapped between the coverand the main unit.
Batteries When replacing the batteries, replace all six with new batteries at the same time.
 Do not use rechargeable batteries.
Jack cover Do not pull the jack cover with excessive force. Doing so may damage the jack cover.
 Do not use the product with the jack cover removed. Doing so may result in ingress of dust or waterand result in malfunctions. If the jack cover is damaged, replace with a new one.
 If the jack cover is not securely fitted, water may get inside. Water may also get in if minute foreign
matter is trapped beneath the jack cover and the product.

1

Use a flathead screwdriver or coin to loosen thebattery cover retaining screw on the underside of
the product.

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5. Usage Instructions

5-2 Removing and attaching the battery unit and charging

2

Open the battery cover.

3

Insert six new AA alkaline batteries.
Remove any old batteries inside.
Note the polarity when inserting new batteries.

4

Close the battery cover, then tighten the battery
cover retaining screw.
Tighten the battery cover retaining screw securely.

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5. Usage Instructions

5-3 Connecting the gas sampling rod

5-3 Connecting the gas sampling rod
Connect the gas sampling rod to the gas inlet (GAS IN) on the main unit.
When measuring gas, connect the gas sampling rod provided to avoid the effects of airborne dust.

CAUTION Use only the gas sampling tube specified by RIKEN KEIKI.
 Correct measurement may not be possible and the reading may be displayed lower than the actual gas
concentration if the tip of the gas sampling rod is blocked or the sampling tube is bent.
When using the gas sampling rod, check to confirm that it is free of obstructions and that it is not bent.
 Use the gas sampling tube with the gas sampling rod connected to prevent foreign matter from being
sucked in. If foreign matter is sucked in, replace the dust filter on the gas sampling rod. (Refer to ‘8-6-2
Gas sampling rod dust filter replacement’.) When connecting the gas sampling rod to the gas sampling tube, tighten only by hand. Overtightening
with a tool may damage the plastic part of the gas sampling rod.

1

Insert the push-fit coupler on the end of the gas
sampling tube into the gas inlet (GAS IN) on themain unit.
Press the push-fit coupler in firmly until you hear a click.
Gas inlet(GAS IN)
Push-fitcouplerGassampling
tube

Gas
sampling rod

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5. Usage Instructions

5-4 Turning on the power

5-4 Turning on the power
When the power is turned on, various settings including the date and time and alarm setpoints are displayed,
and then the measurement mode screen is displayed.

NOTE
 When the power is turned on, the LCD, lamps, and buzzer operate. Before using the product, checkthat these operations function correctly.

1

Hold down the POWER/ENTER button (for at least three seconds) until the buzzer blips once.
When the power is turned on, the LCD display fully lights up and changes automatically as shown below
before entering measurement mode. (Approx. 40 seconds)<GX-9000 display example>

Date and time display

Battery voltage
display

Alarm type display

Maintenancenotification display** Japan Ex model:
Maintenancenotification display/
ATEX/IECEx model:
Adjustment expiration
display

Detection target gas
name/calibration gas
display

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5. Usage Instructions

5-4 Turning on the power

Full scale display

First alarm setpoint
display

Second alarm setpoint
display

STEL alarm setpoint
display

TWA alarm setpoint
display

User ID display

Station ID display

Measurement mode
The buzzer blips twice
and the product entersmeasurement mode.

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5. Usage Instructions

5-4 Turning on the power

CAUTION Turn on the power for the product in clean air.
 Fresh air adjustment must be performed before measuring gas concentrations after turning on the
power. (Refer to ‘5-6 Performing fresh air adjustment in measurement mode’.)NOTE If an abnormality is detected in the R sensor PCB, R sensor, or F sensor, [FAIL] will appear, and asensor abnormality alarm will be triggered.
If an alarm occurs, press the RESET/▼ button to temporarily reset the sensor abnormality alarm.
However, the alarm cannot be reset if there is an abnormality in all of the sensors. After the alarm isreset, [----] appears in the concentration display area of the gas for which the sensor abnormality
occurred, and measurement is not possible for that particular gas. Contact RIKEN KEIKI immediately.
 If an F sensor abnormality occurs and a sensor abnormality is displayed three times in succession, aconfirmation screen will appear asking whether to disable the F sensor. To disable the F sensor, press
the POWER/ENTER button. (If you do not wish to disable the sensor, press the DISP/ESC button.)
If no selection is made within 15 seconds, the next item in initial mode will be selected automaticallywithout disabling the F sensor.
 If an abnormality arises in the internal clock, a fault alarm ([FAIL CLOCK]) may be triggered. If a fault
alarm occurs, press the RESET/▼ button to temporarily reset the fault alarm. Measurement will startwith the incorrect clock time and date.
 In modes other than measurement mode and display mode, the LEDs flash every four seconds.
Date and time display
 If a USB connection is detected while the date and time is displayed, the product enters tocommunication mode.
 Communication mode can also be selected by pressing the RESET/▼ and DISP/ESC buttons

simultaneously while the date and time is displayed.
Power supply voltage display
 This displays the type of battery installed and alarm type.
 If a USB connection is detected while the battery voltage is displayed, the product enterscommunication mode.
 Communication mode can also be selected by pressing the RESET/▼ and DISP/ESC buttons

simultaneously while the battery voltage is displayed.
Sensor startup display
 [SENSOR START UP] is displayed on the screen if the F sensor startup processing is not completed

by the time the battery voltage display ends.
Pump warm-up display (GX-9000H)
 With the GX-9000H, [PUMP WARM UP] is displayed on the screen while the internal pump warms up

after the alarm type display.
Maintenance notification display (Japan Ex model)
 With Japan Ex models, the number of days until one year (365 days) after the last adjustment date isdisplayed. [PLEASE CAL] is displayed on the LCD and the buzzer sounds if more than one year has
elapsed since the last adjustment date. Press the DISP/ESC button or RESET/▼ button to proceed to
the next screen.

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5. Usage Instructions

5-4 Turning on the power

Adjustment expiration display (ATEX/IECEx model) When the adjustment notification expiration display setting is enabled with the ATEX/IECEx model(enabled by default), the number of days remaining until the adjustment notification expiration isdisplayed. If the set adjustment expiration date has passed, notification of expiration is given.
The behavior varies depending on the adjustment expiration function settings. The default setting is“Confirm”.
・ Confirm:
Triggers a fault alarm. Press the DISP/ESC button or RESET/▼ button toproceed to the next screen. Pressing the POWER/ENTER button selects
user mode gas adjustment.
・ Do not confirm:
The next screen is automatically displayed after six seconds. Pressing the
POWER/ENTER button selects user mode gas adjustment.
・ Disable:
Triggers a fault alarm. User mode gas adjustment is automatically selected
after six seconds.
Bump test expiration display
 When the bump test expiration function is enabled (disabled by default), the bump test expiration andnumber of days remaining until bump test expiration are displayed. If the set bump test expiration datehas passed, notification of expiration is given.
The behavior varies depending on the bump test expiration function settings. The default setting is“Confirm”.
・ Confirm:
Triggers a fault alarm. Press the DISP/ESC button or RESET/▼ button toproceed to the next screen. Pressing the POWER/ENTER button selects
user mode gas adjustment.
・ Do not confirm:
The next screen is automatically displayed after six seconds. Pressing the
POWER/ENTER button selects user mode gas adjustment.
・ Disable:
Triggers a fault alarm. User mode gas adjustment is automatically selected
after six seconds.
PID gas name display
 When a VOC sensor is installed, the VOC sensor gas name andmodel (10.6 eV/10.0 eV) are displayed.

Combustible gas conversion gas name display
 Displays the conversion gas name when the NCF sensor is used withcombustible gas conversion.

Full scale display
 Displays the full-scale value of the detection target gas. [IEC] or [ISO] is displayed at the bottom of
the screen if IEC or ISO LEL values are set. [STANDARD] is displayed in other cases. Note that the
LEL setting cannot be changed on the main unit.
First alarm setpoint display
 Displays the first alarm setpoint for the detection target gas.
Second alarm setpoint display
 Displays the second alarm setpoint for the detection target gas.

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5. Usage Instructions

5-4 Turning on the power

STEL alarm setpoint display
 Displays the STEL alarm setpoint for the detection target gas. [OFF] is displayed when the STEL

alarm setpoint is disabled. [----] is displayed when the STEL alarm setpoint is invalid.
 The STEL value is the time-weighted average exposure over a short duration (15 minutes). It is

generally accepted that almost all users will not experience adverse health effect if the STEL value
does not exceed this value. When both STEL and TWA values are subject to restrictions, both values
must be controlled below the specified limits.
 The STEL value refers to the sum of 15 pieces of average value data for measured values over a

period of 60 seconds divided by 15. The value is refreshed every 60 seconds.
TWA alarm setpoint display
 Displays the TWA alarm setpoint for the detection target gas. [OFF] is displayed when the TWA alarm

setpoint is disabled. [----] is displayed when the TWA alarm setpoint is invalid.
 The TWA value refers to the time-weighted average concentration limit of a toxic substance for anormal 8-hour workday and a 40-hour workweek to which almost all users may be repeatedly
exposed without adverse health effect.
 The TWA value refers to the value obtained by integrating average value data for measured values

over a period of 60 seconds and then dividing the integrated value for a period of 8 hours by 480. The
value is refreshed every 60 seconds.
Automatic fresh air adjustment confirmation display
 If the automatic fresh air adjustment function is enabled, a screen isdisplayed to confirm whether or not to perform fresh air adjustment
before proceeding to measurement mode. Pressing the
POWER/ENTER button performs fresh air adjustment. With the GX9000H, fresh air adjustment is performed in both H2S highconcentration measurement mode and H2S low concentration
measurement mode.
To skip fresh air adjustment, press the DISP/ESC button.
The product enters measurement mode when automatic fresh air
adjustment ends.
For information on fresh air adjustment, refer to ‘5-6 Performing fresh
air adjustment in measurement mode’.

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5. Usage Instructions

5-5 Selecting hydrogen sulfide measurement mode range (GX-9000H)

5-5 Selecting hydrogen sulfide measurement mode range (GX-9000H)
With the GX-9000H, you can select between H2S high concentration measurement mode and H2S low
concentration measurement mode.
H2S high concentration measurement mode is initially selected at startup.
In H2S high concentration measurement mode, the product measures oxygen (O2) and high concentrationsof hydrogen sulfide (H2S).
In H2S low concentration measurement mode, the product measures combustible gas, oxygen (O2), carbon
monoxide (CO), and low concentrations of hydrogen sulfide (H2S).
1

Press the ▲/AIR and RESET/▼ buttons simultaneously.
The buzzer blips once, and the product switches between H2S high concentration measurement modeand H2S low concentration measurement mode.
<H2S high concentration
measurement mode><H2S low concentration
measurement mode>

CAUTION When measuring in locations where hydrogen sulfide (H2S) may be present at high concentrations,
measure using H2S high concentration measurement mode.
 When measuring hydrogen sulfide concentrations, first check to confirm that the hydrogen sulfide
concentration is below 100 ppm in H2S high concentration measurement mode before measuring
combustible gas and oxygen concentrations in H2S low concentration measurement mode.
Sucking in high concentrations of hydrogen sulfide (H2S) while in H2S low concentration measurementmode will damage the carbon monoxide and hydrogen sulfide low concentration sensors.
 If you switch between H2S low concentration measurement mode and H2S high concentration
measurement mode with high concentrations of combustible gas drawn in, the combustible gas sensor(new ceramic type) may continue to show the [OVER] display. If this occurs, introduce a sufficientamount of clean air, then press the RESET/▼ button and confirm that the reading returns to normal.
If the correct reading cannot be obtained, perform fresh air adjustment and gas adjustment.

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5. Usage Instructions

5-6 Performing fresh air adjustment in measurement mode

5-6 Performing fresh air adjustment in measurement mode
Perform fresh air adjustment before measuring gas concentrations.
If a VOC sensor is installed, use the activated carbon filter CF-8350 to remove volatile organic compounds(VOCs) from the air during fresh air adjustment.

WARNING When fresh air adjustment is performed in the surrounding atmosphere, check to confirm that the air isclean before starting. Correct fresh air adjustment will not be possible in the presence of miscellaneous
gases. It is also extremely dangerous if the product cannot detect actual gas leaks correctly.
 If a VOC sensor is installed, attach the activated carbon filter CF-8350 for fresh air adjustment.

CAUTION Use the activated removal filter held upright. Drawing in air with the filter horizontal may allow gas topass through the top of the activated carbon filter cylinder, preventing miscellaneous gas from being
absorbed.
 After using the activated carbon filter, attach the cap to block the air flow.
 Heating the activated carbon filter may release large amounts of miscellaneous gas previously
absorbed in the activated carbon filter. If the product sucks in this released miscellaneous gas, it will
reduce the service life of the filter inside the detector. Avoid using the product in environments withhigh levels of miscellaneous gas, and be sure to replace the filter at the stipulated intervals.

To install the activated carbon filter CF-8350, remove the caps on both ends and attach with the arrow on
the side pointing toward the gas inlet (GAS IN) of the main unit.

Activated carbon filter
CF-8350
Use upright with thearrow (↓) pointing
toward the inlet

Gas sampling rod

Gas inlet

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5. Usage Instructions

5-6 Performing fresh air adjustment in measurement mode

CAUTION Perform fresh air adjustment in an environment that meets all of the following conditions:・The same pressure, temperature, and humidity to those in the actual usage environment
・In clean air
 Wait for the reading to stabilize before performing fresh air adjustment.
 If the temperature difference between the storage location and usage location is 15 °C or greater, turnon the power and allow the product to adjust to ambient conditions similar to those at the usage
location for about 10 minutes. After this, perform fresh air adjustment in clean air before use.
 By default, fresh air adjustment is not applied to the carbon dioxide sensor. It must therefore be
adjusted using CO2 zero adjustment.
 Perform CO2 zero adjustments at regular intervals. Also perform CO2 zero adjustment if the CO2
reading deviates significantly from the typical atmospheric CO2 concentration range of 400 – 500 ppm,
even in clean air. (Refer to ‘8-2-3 Performing CO2 zero adjustment’.) To perform fresh air adjustment for the carbon dioxide sensor, enable the CO2 fresh air adjustment
setting in user mode. (Refer to ‘7-4-2 Enabling/disabling CO2 fresh air adjustment’.)
Note however that when fresh air adjustment is performed with the CO2 fresh air adjustment setting
enabled, the carbon dioxide sensor will be automatically set to 400 ppm for the air sucked in and not
the actual carbon dioxide concentration. Although the concentration of carbon dioxide (CO2) in theatmosphere is typically around 400 – 500 ppm, correct adjustment may not be possible depending on
the environmental carbon dioxide level. In such cases, we recommend adjustment using CO2 zeroadjustment. (Refer to ‘8-2-3 Performing CO2 zero adjustment’.) Do not enable the CO2 fresh air adjustment setting when VOC sensors are installed. Correct
adjustment will not be possible due to the carbon dioxide (CO2) generated by the activated carbon filter
CF-8350.
 If the fresh air adjustment during measurement function is disabled, fresh air adjustment is not possible.
Modify the setting for the fresh air adjustment during measurement function using the setup program
sold separately.
 If a TEF sensor (methane (CH4) or isobutane (HC (i-C4H10)) type) and oxygen sensor are installed,base gas adjustment must also be performed after fresh air adjustment. (Refer to ‘8-2-4 Performingbase gas adjustment’ and the ‘<The effects of coexisting gas on high-concentration combustible gas
sensors>’ note in ‘5-7-1 Measuring gas concentration’.) If a TEF sensor (methane (CH4) or isobutane (HC (i-C4H10)) type) is installed and no oxygen sensor isinstalled, and a TEF sensor (hydrogen (H2) type) is installed, fresh air adjustment is not applied.
Perform only base gas adjustment. (Refer to ‘8-2-4 Performing base gas adjustment’ and the ‘<The
effects of coexisting gas on high-concentration combustible gas sensors>’ note in ‘5-7-1 Measuring
gas concentration’.)NOTE<GX-9000H>
 Perform fresh air adjustment separately in H2S high concentration measurement mode and H2S low

concentration measurement mode. Press the ▲/AIR and RESET/▼ buttons simultaneously. The
buzzer blips once, and the product switches between H2S high concentration measurement mode andH2S low concentration measurement mode.

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5. Usage Instructions

5-6 Performing fresh air adjustment in measurement mode1

Hold down the ▲/AIR button in measurement mode.
The fresh air adjustment screen is displayed.
Keep the ▲/AIR button pressed for as long as thescreen shown on the right is displayed.
Fresh air adjustment will not be performed if you release
the button before the screen shown on the right isdisplayed or while it is displayed.

2

Release the ▲/AIR button once [RELEASE] appearson the screen.

The result is displayed and the product automatically
returns to measurement mode once fresh air adjustment
has been successfully completed.

NOTE If fresh air adjustment fails, fresh air adjustment is not performed, and [FAIL] appears in theconcentration display area for the failed sensor.
Press the RESET/▼ button to reset the fault alarm (adjustment failure). Resetting the alarm displays
the value prior to fresh air adjustment.

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5. Usage Instructions

5-7 Measurement

5-7 Measurement
DANGER
Usage If measuring inside manholes or enclosed spaces, never lean over or look into the manhole or
enclosed space. There is a danger that oxygen-deficient air or other gases may be discharged fromsuch locations.
Gas outlet
 Oxygen-deficient air or other gas may be discharged from the gas outlet. Never breathe in this air.
 High-concentration gas may be discharged. Be sure to maintain a safe distance from flame sources.

WARNING The product is designed to draw in gas at atmospheric pressure. There is a danger that detection
target gas may leak from inside the product if an excessive pressure is applied to the product gas inlet(GAS IN) or outlet (GAS OUT). Be careful to avoid excessive pressure during use.
 Do not connect a gas sampling tube directly to locations subject to a pressure above the atmosphericpressure. Doing so may result in damage to the internal pipes.
 A gas alarm indicates the presence of extreme danger. The user must take appropriate action.
 Check the battery level before using the product. The batteries may be depleted when the product isused for the first time or after extended periods without use. Always fully charge or replace with newbatteries before use.
 Gas measurement will not be possible if a battery low voltage alarm occurs. If the alarm occurs duringuse, turn off the power and promptly charge or replace the batteries in a safe place.
 Do not block the buzzer sound opening. Doing so will muffle or silence the audible warning.

CAUTION Check the product settings before starting gas measurement.
 When measuring gas, connect the gas sampling rod provided to avoid the effects of airborne dust.
 With the NCF sensor, continuously measuring high concentrations of combustible gases that exceed
the full-scale range for an extended period may negatively impact the sensor. Note that switching to athermal conductivity type sensor will have no adverse effects, as the NCF sensor is not used formeasurement.
 Use the product with the LCD display facing upward. Correct readings may not be obtained if it is used
at an angle or laid flat.
 Do not expose the product to sudden pressure fluctuations. Oxygen readings (O2) will vary temporarily,
preventing accurate measurement.
 If highly adsorptive gas has been sucked in, allow the product to suck in clean air, and confirm that thereading returns to zero before use.
 If the separately sold sampling tube with float or weight is used when measuring highly adsorptive gas,
the gas may be adsorbed inside the tube, resulting in a lower concentration reading than the actual
concentration of the detection target gas at the measurement point.

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5. Usage Instructions

5-7 Measurement

 Some sensors may exhibit positive sensitivity to gases other than the detection target gas.
Note that when the product is used in an environment where such gases are present, the reading may
be higher than the actual concentration of the detection target gas present.
<Examples of interference gases to which the sensor exhibits positive sensitivity>
Sensor detection principle

Detection target gas nameInterference gas

New ceramic type

Methane (CH4)/isobutane (HC (i-C4H10))/hydrogen (H2)/acetylene (C2H2)

All combustible gases

Non-dispersive infrared type
(NDIR)

Methane (CH4)/isobutane (HC (i-C4H10))

Hydrocarbon combustible
gases

Photo-ionization type (PID)

Volatile organic compounds (VOCs)

All volatile organic
compounds (VOCs)

 Due to their operating principle, electrochemical type sensors may exhibit negative sensitivity to certain
interference gases. In environments where interference gases are present, the reading may be lower
than the actual concentration of the detection target gas present, and particularly at highconcentrations, the reading may even turn negative, triggering an M OVER alarm. (Refer to ‘12-6 Listof interference gases for electrochemical type sensors’.) Note that if new ceramic type combustible gas sensors are used in an environment where silicone
compounds, halides, high-concentration sulfides, or high-concentration solvent gases are present,
sensor life may be reduced, sensitivity to combustible gases may deteriorate, and accurate readings
may not be obtained.
If use in such environments is unavoidable, use for the shortest possible time and allow the product tosuck in clean air afterward. Confirm that the reading returns to normal and is stabilized.
 An oxygen concentration of at least 10 vol% is required in order for the new ceramic type combustible
gas sensor (%LEL) in the product to accurately measure gases and display concentrations.
 Due to the sensor characteristics, an accurate reading may not be displayed immediately after turningon the power. Allow the product to warm up for at least one minute after turning on the power to allow
the reading to stabilize before use. Allow the product to warm up for at least 10 minutes after turningon the power before performing gas adjustment.
 The reading of the carbon monoxide sensor may rise if exposed to high concentrations of volatileorganic compounds (VOCs). If the reading rises and will not return, the activated carbon filter in the
carbon monoxide sensor must be replaced. For information on activated carbon filter replacement,
contact RIKEN KEIKI.
 The zero point for carbon monoxide and hydrogen sulfide sensors may fluctuate at low or hightemperatures. If this occurs, perform fresh air adjustment in the ambient atmosphere.
 The hydrogen sulfide sensor may exhibit temporary fluctuations if exposed to sudden temperature
variations. Allow the product to stand and acclimatize in the ambient atmosphere.
 If the VOC sensor is exposed to high concentrations of methane (CH4), ethane (C2H6), propane (C3H8),or other gases, [----] may appear on the concentration display, the lamps may flash, and the buzzer
may sound, temporarily disabling measurement. In environments where these gases are present, even
if the concentration display does not indicate [----], be aware that the VOC concentration may not be
accurately measured.
Note that, even if the VOC sensor concentration display indicates [----], other unaffected sensors cancontinue measurement.
<Example interference gases causing [----] to be displayed on the VOC sensor concentration display>
Interference gas

Concentration

Methane (CH4)

6 vol% or more

Ethane (C2H6)

80 vol% or more

Propane (C3H8)

90 vol% or more
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5. Usage Instructions

5-7 Measurement

 Use the sampling tube with weight in conjunction with the CF-8385 absorbent cotton filter.
The CF-8385 absorbent cotton filter is used to remove dust and protect against water. When using thesampling tube with weight, the filter cylinder retaining belt and connecting tube must also be used. Ifwater is sucked in without using the CF-8385 absorbent cotton filter, water will get inside the main unit,
causing it to fail.
 If the separately sold sampling tube with float or weight is used when measuring highly adsorptive gas,
the gas may be adsorbed inside the tube, resulting in a lower concentration reading than the actual
concentration of the detection target gas at the measurement point.
 The CF-8385 absorbent cotton filter is recommended for dusty environments, as the IRF sensor issusceptible to the effects of dust.
 Do not use the separately sold tubes or filters when the ESF sensor (except for the ESF-A24R2 (highconcentration H2S)) or VOC sensor is installed, due to the risk of adsorption, even when recommended
above.

CAUTION<GX-9000H>
 When measuring in locations where hydrogen sulfide (H2S) may be present at high concentrations,
measure using H2S high concentration measurement mode.
 When measuring hydrogen sulfide concentrations, first check to confirm that the hydrogen sulfide
concentration is below 100 ppm in H2S high concentration measurement mode before measuring
combustible gas and oxygen concentrations in H2S low concentration measurement mode.
Sucking in high concentrations of hydrogen sulfide (H2S) while in H2S low concentration measurementmode may damage the combustible gas (new ceramic type), carbon monoxide, and low concentrationhydrogen sulfide sensors.

NOTE
 The refresh intervals for each sensor gas concentration display are as follows:

Gas concentration display
refresh interval

Sensor typeR sensor

Every second

F sensor
NCF sensor (new ceramic type)

Every second

TEF sensor (thermal conductivity type)

Every 4 seconds

IRF sensor (non-dispersive infrared type (NDIR))

Every 4 seconds

ESF/ESR sensor (electrochemical type)

Every second

PIF sensor (photo-ionization type (PID))

Every second

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5. Usage Instructions

5-7 Measurement

5-7-1 Measuring gas concentration
Measure gas concentrations in measurement mode.
Bring the gas sampling rod close to the location to be measured.
The product sucks in the detection target gas, and the measurement results are displayed on the LCD
display.
<GX-9000><GX-9000H>
H2S high concentration
measurement mode

H2S low concentration
measurement mode

NOTE
 The operating time will be reduced due to battery performance in cold environments at -10 °C or

below.
 The response of the LCD display may slow at low temperatures.
 If combustible gas is drawn in at high concentrations of 100 %LEL or above, gas adsorbed in the gas

sampling tube and gas sampling rod may remain inside the tube. After drawing in high-concentration
combustible gas, always draw in clean air and perform air cleaning until the reading returns to aroundzero to remove any adsorbed gas. Performing fresh air adjustment before complete cleaning may
prevent accurate fresh air adjustment and may adversely affect measurement.
In this case, faulty adjustment can be prevented by first detaching the gas sampling tube and thenperforming fresh air adjustment.
Sensors
 The conversion gas name is displayed at the bottom of the screen when combustible gas conversion

is set. (Refer to ‘6-4-2 Combustible gas conversion gas selection’.) If the combustible gas reading exceeds 100 %LEL, the carbon monoxide (CO) reading will increase

temporarily, but this is not an abnormality.
 When measuring in locations where combustible gas may be present at high concentrations, measureusing the vol% range.
 If the oxygen concentration drops below 10 %, the combustible gas concentration reading for NCF

sensors will appear as [----]. If the NCF/TEF sensor range setting is set to [AUTO RANGE] (default
setting), the display changes to the TEF sensor reading. If [LEL ONLY] is set, measurement will not
be performed. Reassess the usage environment. (Refer to ‘6-4-1 Setting the NCF/TEF sensor range’.) If the oxygen sensor (ESR-X13P) is not installed or if the combustible gas concentration is displayed
only in the %LEL range, the OVER alarm will remain fixed if the measured combustible gas
concentration exceeds 100 %LEL.
To reset the alarm, press the RESET/▼ button in the presence of clean air. The concentration display
resumes a short while after pressing the RESET/▼ button.
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5. Usage Instructions

5-7 Measurement<The effects of coexisting gas on high-concentration combustible gas sensors> TEF sensors used to measure high-concentration combustible gas rely on differences in the thermal

conductivity of gases. Readings may therefore be affected if gases are present in high concentrations,even for gases other than combustible gases present in the air.
 When a TEF sensor (methane (CH4) type or isobutane (HC (i-C4H10)) type) and oxygen sensor are

installed, a function* that automatically compensates for the effects on readings by feeding backoxygen concentration fluctuations to the high-concentration combustible gas measurement results
eliminates the effects of oxygen concentration.
Base gas adjustment (at an oxygen concentration of 0 %) must therefore be performed in addition to
fresh air adjustment (at an oxygen concentration of 20.9 %) in order to correct the oxygen
concentration accurately.
* The effects cannot be compensated for if coexisting gases other than oxygen (O2) are present.
 When a TEF sensor (methane (CH4) type or isobutane (HC (i-C4H10)) type) is installed and no oxygen

sensor is installed, oxygen concentration changes will not be fed back to the high-concentration
combustible gas measurement results.
Likewise, if a TEF sensor (hydrogen (H2) type) is installed, the oxygen sensor readings will beaffected by hydrogen (H2), preventing feedback of oxygen concentration changes to highconcentration combustible gas measurement results.
With these specifications, fresh air adjustment (at an oxygen concentration of 20.9 %) is notapplicable, and only base gas adjustment (at an oxygen concentration of 0 %) needs to be performed.
Note that high-concentration fluctuations for coexisting gases may have an impact, but the effects of
the oxygen concentration in the air (20.9 %) can be minimized by selecting [N2] as the gas for basegas adjustments (refer to ‘7-4-3 Selecting gas type for base gas adjustment’) and performing basegas adjustments using air. (Refer to ‘8-2-4 Performing base gas adjustment’.) The product is designed to allow measurement of high concentrations of combustible gas in air aswell as in nitrogen (N2) atmospheres and inert gas atmospheres (assumed as nitrogen (N2): 86 vol%,carbon dioxide (CO2): 14 vol%). If the composition is known in advance, the product can be adjusted
to suit that atmosphere and ensure accurate readings.

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5-7 Measurement

5-7-2 Combustible gas concentration range changeover points
The product will automatically switch to the vol% range when the combustible gas concentration measured
exceeds 100 %LEL.
The range automatically reverts to %LEL when the concentration falls.

NOTE
 The %LEL and %vol ranges are measured using sensors that rely on different principles, so thereadings may not coincide temporarily in the vicinity of the changeover point.

<NCF/TEF sensors>
The combustible gas concentration shows the case for methane (CH4).
The range changeover point is at the gas lower explosive limit (LEL). For methane (CH4), this is 5.0 vol%.
It will vary depending on the gas type and model. The 100 %LEL value is displayed in the full scale display
at startup. (Refer to ‘5-4 Turning on the power’.)Methane (CH4)
concentration

100 %LEL(5.0 vol%)%LEL range

vol% range

Changeover point%LEL range

Changeover point<IRF sensors>
The range changeover point is at 100 %LEL.
It will vary depending on the gas type and model. The 100 %LEL value is displayed in the full scale display
at startup. (Refer to ‘5-4 Turning on the power’.)Isobutane (HC (i-C4H10))
concentration

100 %LEL%LEL range

vol% range

Changeover point

69/204%LEL range

Changeover point5. Usage Instructions

5-7 Measurement

5-7-3 Basic operating flow in measurement mode
<GX-9000><Measurement mode>
Hold down<Fresh air
adjustment><Snap logger><Pump on/off><Display mode><Fault alarm(Flow rate abnormality)>+

Hold down

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5. Usage Instructions

5-7 Measurement<GX-9000H><H2S high concentration
measurement mode><H2S low concentration
measurement mode>

Hold down<Fresh air
adjustment><Display mode><Snap logger>+<Pump on/off>

Hold down<Fault alarm(Flow rate abnormality)>

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5. Usage Instructions

5-7 Measurement

5-7-4 Confirmation beep operation
The confirmation beep is a function that provides audible notification of bump test expiration and gas alarms
when the product is operating normally.
The buzzer and LEDs operate at preset intervals while measurement is underway.

NOTE
 The confirmation beep operates only in measurement mode and display mode.
 If a gas alarm has occurred, the gas alarm takes precedent.
 The confirmation beep operation can be modified using the setup program sold separately.

The buzzer and LEDs operate as follows depending on the confirmation beep operation type. The default
setting is [OFF].
 [OFF]:

Do not operate.

 [LED]:

The LEDs operate twice at the set operating time interval.

 [BUZZER]:

The buzzer sounds twice at the set operating time interval.

 [LED+BUZZER]:

The LEDs and buzzer operate twice at the set operating time interval.

 [BUMP/CAL]:

The LEDs light up for one second at the set operating time interval when the bump test
expiration function is enabled and the span adjustment expiration date has passed orwhen the bump test expiration function is enabled and the bump test has expired. The
buzzer and LEDs continue to operate even when the product is restarted until span
adjustment or bump testing has been performed for all of the installed sensors.

 [ALM ALRT]:The LEDs light up for one second at the set operating time interval when a gas alarm(including negative sensor fault) occurs. The buzzer and LEDs continue to operate,even if the product is restarted, until span adjustment or bump testing has been
performed for all of the installed sensors.

 [B/C/ALM]:

The LEDs light up for one second at the set operating time interval when a gas alarm(including negative sensor fault) occurs when the bump test expiration function is }enabled and the span adjustment expiration date has passed or when the bump test
expiration function is enabled and the bump test has expired. The buzzer and LEDs
continue to operate even when the product is restarted until span adjustment or bumptesting has been performed for all of the installed sensors.

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5. Usage Instructions

5-8 Recording gas concentration logs (snap logger)

5-8 Recording gas concentration logs (snap logger)
Up to 256 user-specified gas concentration values can be recorded while measurement is in progress.
If the number of recorded data values exceeds 256, the oldest data value will be overwritten.
1

Press the ▲/AIR and DISP/ESC buttons
simultaneously on the measurement mode screen.
The record number, station ID, record date and time,and current gas concentration to be recorded are
displayed repeatedly in succession.

2

Press the POWER/ENTER button.
If you do not wish to record, press the DISP/ESC button.
The current gas concentration is recorded.
[END] appears and the display returns to themeasurement mode screen.

NOTE Press the ▲/AIR and DISP/ESC buttons simultaneously. The display mode screen will be displayed if

the buttons are not pressed together. If this occurs, release both buttons, return to the measurementmode screen, then repeat the process.
 The recorded data can be checked on the snap logger display screen in display mode. (Refer to‘6-3-2 Displaying the snap logger (gas concentration/alarm status)’.)73/204

5. Usage Instructions

5-9 Stopping the pump

5-9 Stopping the pump
1

Hold down the RESET/▼ button on themeasurement mode screen (for approximately fiveseconds).
The pump stops.

WARNING Gas alarms and low flow rate alarms are not triggered while the pump is stopped.

NOTE Either press the RESET/▼ button while the pump is stopped, or wait 10 minutes for the pump torestart. The measurement mode screen is displayed.

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5. Usage Instructions

5-10 Turning off the power

5-10 Turning off the power
CAUTION If the concentration display does not return to zero (20.9 % for the oxygen concentration display oraround 400 – 500 ppm for the carbon dioxide concentration display) after measurement ends, allow
the product to stand in clean air until the display returns to zero before turning off the power.

1

Hold down the POWER/ENTER
button (for at least three seconds).
The buzzer blips three times and[TURN OFF] appears on the display
before the power turns off.

NOTE When turning off the power, hold down the button until the display

turns off.
 If the display has not returned to zero when you turn off the power,

purging will be performed for up to 30 seconds to clean the productinterior. The screen as shown on the right is displayed while purging isin progress.

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6. Settings (Display Mode)

6-1 Display mode items

6

Settings (Display Mode)
6-1 Display mode items
LCD display

Details

Reference

NC/TE RANGE
Sets the range selection method for the NCF and TEF
sensor detection target gas concentrations.
This is displayed when the NCF and TEF sensors are
installed.

6-4-1 Setting the
NCF/TEF sensor
range

Displays the maximum gas concentration (orminimum concentration for L-H alarm type) measured
since the power was turned on.

6-3-1 Clearing the
PEAK value

PEAK

STEL

Displays the STEL value for 15-minute period prior tothe current time (or since the power was turned on).
The STEL value refers to the sum of 15 pieces of
average value data for measured values over a
period of 60 seconds divided by 15.
The value is refreshed every 60 seconds.
[----] is displayed when the STEL value is an invalid
concentration.

TWA

Displays the TWA value for 8-hour period prior to thecurrent time (or since the power was turned on).
The TWA value refers to the value obtained byintegrating average value data for measured values
over a period of 60 seconds and then dividing the
integrated value for a period of 8 hours by 480.
The value is refreshed every 60 seconds.
[----] is displayed when the TWA value is an invalid
concentration.

HC GAS LIST

Displays the combustible gas concentration afterconverting it to the concentration of the conversion
gas registered in the product.
It is displayed when all of the following conditions are
satisfied:・ An NCF sensor is installed.
・ No TEF sensor is installed.
・ The calibration gas is methane (CH4) or isobutane(HC (i-C4H10)).

76/2046-4-2 Combustible
gas conversion gas
selection

6. Settings (Display Mode)

6-1 Display mode items

LCD display

Details

Reference

Displays the volatile organic compound (VOC)
concentration after converting it to the concentrationof the conversion gas registered in the product.

6-4-3 Volatileorganic compound(VOC) conversion
gas selection

Sets the user ID.

6-4-4 Setting theuser ID

Sets the station ID.

6-4-5 Setting thestation ID

Displays the gas concentration and alarm statusrecorded by the snap logger function.

6-3-2 Displaying thesnap logger (gasconcentration/alarm
status)

Displays the date on which gas adjustment was
performed for each sensor.
This appears with the ATEX/IECEx model when theadjustment expiration function is enabled.

6-3-3 Displaying
adjustment records

Displays the date on which the bump test was
performed for each sensor.
It is displayed when the bump test expiration function
is enabled.

6-3-4 Displaying
bump test records

PID1/PID2/PID3 GAS SELUSER ID

STATION ID

REC DATA DISPCAL DATABUMP DATA

DATE
Displays the current date and time and temperature(°C).
The temperature is the product internal temperature.
This will differ from the actual ambient temperature.

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6. Settings (Display Mode)LCD display

6-1 Display mode items

Details

Reference

GAS NAME
Displays the target gas names and calibration gas
names.

ALARM POINTS
Displays the full-scale value, first alarm setpoint,
second alarm setpoint, STEL alarm setpoint, andTWA alarm setpoint for each sensor.

6-3-5 Displaying
alarm setpoints

Sets the connection to a Bluetooth device when theBluetooth function is enabled.

6-4-6 Setting aBluetooth device
connection

Selects the buzzer volume setting.

6-4-7 Setting thebuzzer volume

Returns the display language to English.
This appears with the ATEX/IECEx model when alanguage other than English has been set.

6-4-8 Switchingdisplay language to
English(ATEX/IECEx
model)

Returns the display language to Japanese.
This appears with the Japan Ex model when alanguage other than Japanese has been set.

6-4-9 Switchingdisplay language toJapanese (Japan
Ex model)BLUETOOTHBUZZER VOLUMETO ENGLISH

TO JAPANESE

78/204

6. Settings (Display Mode)

6-2 Switching to display mode

6-2 Switching to display mode1

Press the DISP/ESC button on the measurementmode screen.

Pressing the DISP/ESC button displays the various
setting item screens in sequence.

・・・

The product returns to measurement mode once thedisplay mode item display has ended.

NOTE You can also jump between display mode items by holding down the DISP/ESC button.
 If no button is pressed for approximately 20 seconds in display mode, the product will return tomeasurement mode.

NOTE<GX-9000H>
 Display mode can be selected from both H2S high concentration measurement mode and H2S low

concentration measurement mode.

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6. Settings (Display Mode)

6-3 Checking settings

6-3 Checking settings
6-3-1 Clearing the PEAK value
This clears the maximum gas concentration (or minimum oxygen (O2) concentration) measured since thepower was turned on.

NOTE
 The PEAK value cannot be cleared if the password protection setting is enabled.
 Disabling the PEAK reset function in [Disp mode item] of the setup program sold separately will

prevent the PEAK value from being cleared. (The default setting is enabled.)

1

Press the DISP/ESC button several times on themeasurement mode screen to display the PEAK
screen.

2

Hold down the ▲/AIR button (for approximately
three seconds).

3

Release the ▲/AIR button once [RELEASE] appearson the screen.

The PEAK value is cleared and the display returns tothe screen in Step 1.

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6. Settings (Display Mode)

6-3 Checking settings

6-3-2 Displaying the snap logger (gas concentration/alarm status)
Displays the gas concentration and alarm status recorded by the snap logger function.
1

Press the DISP/ESC button several times on themeasurement mode screen to display the snap
logger display screen.

2

Press the POWER/ENTER button.
If you do not wish to display the snap logger, press the
DISP/ESC button.

3

Press the ▲/AIR or RESET/▼
button to select the record number
to be to be displayed.

4

Press the POWER/ENTER button.
The data is displayed for the record number selected.

5

Press the DISP/ESC button.
The display returns to the screen in Step 3.

NOTE
 [NO DATA] will be displayed if no snap logs are recorded. If this occurs, press the DISP/ESC button or

POWER/ENTER to return to the screen in Step 1.
 To cancel the snap logger display, press the DISP/ESC button in Step 4.

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6. Settings (Display Mode)

6-3 Checking settings

6-3-3 Displaying adjustment records
Displays the date on which gas adjustment was performed for each sensor.

NOTE
 Adjustment records are displayed with the ATEX/IECEx model when the adjustment expiration

function is enabled (the default setting is enabled).

1

Press the DISP/ESC button several times on themeasurement mode screen to display the CAL DATA
screen.

2

Press the POWER/ENTER button.
If you do not wish to display the gas adjustment records,
press the DISP/ESC button.

3

Press the ▲/AIR button.
Pressing the ▲/AIR button cycles through the sensors
displayed.

4

Press the DISP/ESC button.
The display returns to the screen in Step 1.

NOTE
 With a double-range IRF sensor (methane (CH4), isobutane (HC (i-C4H10))) that allows adjustment for

both high and low concentrations, the adjustment records will be displayed separately for high andlow concentrations.
<High concentration><Low concentration>

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6. Settings (Display Mode)

6-3 Checking settings

6-3-4 Displaying bump test records
Displays the date on which the bump test was performed for each sensor.

NOTE
 Bump test records are displayed when the bump test expiration function is enabled (the default setting

is disabled).
 The bump test data is also updated automatically when gas adjustment is performed.

1

Press the DISP/ESC button several times on themeasurement mode screen to display the BUMPDATA screen.

2

Press the POWER/ENTER button.
If you do not wish to display the bump test records,
press the DISP/ESC button.

3

Press the ▲/AIR button.
Pressing the ▲/AIR button cycles through the sensors
displayed.

4

Press the DISP/ESC button.
The display returns to the screen in Step 1.

NOTE
 With a double-range IRF sensor (methane (CH4), isobutane (HC (i-C4H10))) that allows adjustment for

both high and low concentrations, the bump test records will be displayed separately for high and low
concentrations.
<High concentration><Low concentration>

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6. Settings (Display Mode)

6-3 Checking settings

6-3-5 Displaying alarm setpoints
Displays the full-scale value (FULL SCALE), first alarm setpoint (WARNING), second alarm setpoint(ALARM), STEL alarm setpoint (STEL), and TWA alarm setpoint (TWA) for each sensor.
1

Press the DISP/ESC button several times on themeasurement mode screen to display the ALARM
POINTS screen.

2

Press the POWER/ENTER button.
If you do not wish to display the alarm setpoints, press
the DISP/ESC button.

3

Press the ▲/AIR button.
Pressing the ▲/AIR button cycles through the alarm
setpoints displayed.
The display changes in the following sequence:[FULL SCALE] → [WARNING] → [ALARM] → [STEL] →[TWA] → [FULL SCALE] → ・・・

To [FULL SCALE] display
4

Press the DISP/ESC button.
The display returns to the screen in Step 1.

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6. Settings (Display Mode)

6-3 Checking settings

NOTE
 To test the alarms, press the POWER/ENTER button while an alarm setpoint is displayed. (Refer to‘8-4 Performing alarm tests’.)85/204

6. Settings (Display Mode)

6-4 Display mode settings

6-4 Display mode settings
6-4-1 Setting the NCF/TEF sensor range
Sets the range selection method for the NCF and TEF sensor detection target gas concentrations.
Select one of the following. The default setting is [AUTO RANGE].
 [AUTO RANGE]: The product will automatically switch to the vol% range if the combustible gas
concentration measured exceeds 100 %LEL. The range automatically reverts tothe %LEL range if the concentration falls. [----] appears in the TEF sensor concentration
display area for the %LEL range. [OVER] appears in the NCF sensor concentration
display area for the vol% range. (Refer to ‘5-7-2 Combustible gas concentration rangechangeover points’.) [VOL ONLY]:

The measured combustible gas concentration is displayed only in the vol% range. [OFF]appears in the NCF sensor concentration display area.

 [LEL ONLY]:

The measured combustible gas concentration is displayed only in the %LEL range.
[OFF] appears in the TEF sensor concentration display area.

NOTE The NCF and TEF sensor ranges can be set only when the NCF and TEF sensors are installed. The

item does not appear in display mode in other cases.
 The NCF and TEF sensor range settings are not retained. The setting in effect immediately after

turning on the power is [AUTO RANGE].
 Use the NCF and TEF sensors for the same gas types.
 When [AUTO RANGE] is set, [----] will appear in the TEF sensor display for NCF sensor

measurements. [OVER] will appear in the NCF sensor display for TEF sensor measurements.
 If the combustible (NCF/TEF) range selection function is disabled in [DISP mode settings] of the setup

program sold separately, this setting item will no longer appear in display mode. (The default setting isenabled.)1

Press the DISP/ESC button several times on themeasurement mode screen to display the NC/TE
RANGE screen.

2

Press the POWER/ENTER button.
If you do not wish to set, press the DISP/ESC button.

3

Press the ▲/AIR or RESET/▼ button to select the
NCF and TEF sensor range selection method.
Select [AUTO RANGE], [VOL ONLY], or [LEL ONLY].

4

Press the POWER/ENTER button.

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6. Settings (Display Mode)

6-4 Display mode settings

The NCF and TEF sensor ranges are set.
[END] appears, and the display returns to the screen in
Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 4.

6-4-2 Combustible gas conversion gas selection
The combustible gas concentration can be displayed after converting it to the concentration of theconversion gas registered in the product.

NOTE Combustible gas conversion can be set only when all of the following conditions are satisfied:・ An NCF sensor is installed.
・ No TEF sensor is installed.
・ The calibration gas is methane (CH4) or isobutane (HC (i-C4H10)).
 The item will not appear in display mode unless the above conditions are satisfied.
 The combustible gas conversion setting is retained even when the power is turned off.
 If the combustible gas conversion gas selection function is disabled in [Disp mode item] of the setup
program sold separately, this setting item will no longer appear in display mode. (The default setting isenabled.)The following combustible gases can be converted:
Gas name

Conversion frommethane (CH4)specifications

Conversion from isobutane(HC (i-C4H10)) specifications
Not available

Methane

CH4-

Isobutane

HC (i-C4H10)

Available-

Hydrogen

H2

Available

Available

Methanol

CH3OH

Available

Available

Acetylene

C2H2

Available

Available

Ethylene

C2H4

Available

Available

EthaneC2H6

Available

Not available

Ethanol

C2H5OH

Available

Available

Propylene

C3H6

Available

Available

AcetoneC3H6O

Available

Available

Propane

C3H8

Available

Not available

Butadiene

C4H6

Available

Available

Cyclopentane

C5H10

Available

Available

Benzene

C6H6

Available

Available

N-hexanen-C6H14

Available

Available

Toluene

C7H8

Available

Available

Heptanen-C7H16

Available

Available

Xylene

C8H10

Available

Available

N-nonane

n-C9H20

Available

Available

Ethyl acetate

EtAc

Available

Available

IPA

IPA

Available

Available

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6. Settings (Display Mode)

6-4 Display mode settings

Gas name

Conversion frommethane (CH4)specifications

Conversion from isobutane(HC (i-C4H10)) specifications

MEK

MEK

Available

Available

Methyl methacrylate

MMA

Available

Available

Dimethyl ether

DME

Available

Available

Methyl isobutyl ketone

MIBK

Available

Available

Tetrahydrofuran

THF

Available

AvailableN-pentane

n-C5H12Available

Available

NOTE
 The concentration display when converted should be treated as approximate.
 The product specifications vary depending on the combustible gas to be measured. Depending on the

product specifications, certain gas types may not be converted.
 Even if the combustible conversion gas function is selected, the readings will be affected if othercombustible gases are present in the usage environment.
 If the combustible gas conversion function is used, the indication accuracy for the product will not be

achieved.

1

Press the DISP/ESC button several times on themeasurement mode screen to display the HC GASLIST screen.

2

Press the POWER/ENTER button.
If you do not wish to set, press the DISP/ESC button.

3

Press the ▲/AIR or RESET/▼ button to select thegas type for conversion.

4

Press the POWER/ENTER button.

Conversion will be performed for the selected gas type.
[END] appears, and the display returns to the screen in
Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 4.

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6. Settings (Display Mode)

6-4 Display mode settings

6-4-3 Volatile organic compound (VOC) conversion gas selection
Volatile organic compound (VOC) concentration is normally displayed as isobutylene (C4H8), but this can bedisplayed converted to a specific pre-registered gas.
For information on volatile organic compound (VOC) conversion gas types, refer to ‘12-5 Volatile organic
compound (VOC) conversion gas list’.

NOTE Volatile organic compound (VOC) conversion can be set only when a VOC sensor is installed. The

item does not appear in display mode in other cases.
 The list of gas types displayed will vary depending on the VOC sensor model (10.6 eV/10.0 eV)

installed.
 The list of gas types displayed is as follows:・ List set using the MT-9000 Series setup program (up to 30 for each VOC sensor model)
・ Recently used gas types (up to seven for each VOC sensor model)
・ Lists by first letter A to Z
 If the PID gas list function is disabled in [Disp mode item] of the setup program sold separately, thissetting item will no longer appear in display mode. (The default setting is enabled.)

1

Press the DISP/ESC button several
times on the measurement mode
screen to display the PID1 GAS
SEL screen.
[PID1], [PID2], or [PID3] will be
displayed depending on the VOC
sensor model.

2

Press the POWER/ENTER button.
If you do not wish to set, press the
DISP/ESC button.

3

Press the ▲/AIR or RESET/▼ button to select thefirst letter of the gas type for conversion.

4

Press the POWER/ENTER button.
The gas types beginning with the first letter selected are
displayed.

5

Press the ▲/AIR or RESET/▼ button to select thegas type for conversion.

6

Press the POWER/ENTER button.

The selected gas type is displayed.

* The example screens here show
the display when lists by first
letter A to Z are set.

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6. Settings (Display Mode)

6-4 Display mode settings[END] appears, and the display returns to the screen in
Step 1.

NOTE Hold down the ▲/AIR or RESET/▼ button on the gas name list to move 10 items up or down at atime.
 To cancel the setting, press the DISP/ESC button in Step 6.

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6. Settings (Display Mode)

6-4 Display mode settings

6-4-4 Setting the user ID
Sets the user ID.
The user ID is used to identify individual users.
1

Press the DISP/ESC button several
times on the measurement mode
screen to display the USER ID
screen.

2

Press the POWER/ENTER button.
If you do not wish to set, press the
DISP/ESC button.

3

Press the ▲/AIR or RESET/▼ button to select a user
ID.

4

Press the POWER/ENTER button.

The user ID selected is set.
[END] appears, and the display returns to the screen in
Step 1.

NOTE
 User IDs can be set from USER_ID_001 to USER_ID_128.
 Hold down the ▲/AIR or RESET/▼ button on the user ID list to move 10 items up or down at a time.
 To cancel the setting, press the DISP/ESC button in Step 4.
 The data logger management program sold separately is required to register and edit user IDs. For

information on the data logger management program, contact RIKEN KEIKI.
 If the user ID selection function is disabled in [Disp mode item] of the setup program sold separately,

this setting item will no longer appear in display mode. (The default setting is enabled.)

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6. Settings (Display Mode)

6-4 Display mode settings

6-4-5 Setting the station ID
Sets the station ID.
The station ID is used to identify measurement points.
1

Press the DISP/ESC button several
times on the measurement mode
screen to display the STATION ID
screen.

2

Press the POWER/ENTER button.
If you do not wish to set, press the
DISP/ESC button.

3

Press the ▲/AIR or RESET/▼ button to select astation ID.

4

Press the POWER/ENTER button.

The station ID selected is set.
[END] appears, and the display returns to the screen in
Step 1.

NOTE Station IDs can be set from STATION_ID_001 to STATION_ID_128.
 Hold down the ▲/AIR or RESET/▼ button on the station ID list to move 10 items up or down at a time.
 To cancel the setting, press the DISP/ESC button in Step 4.
 The data logger management program sold separately is required to register and edit station IDs. For

information on the data logger management program, contact RIKEN KEIKI.
 If the station ID selection function is disabled in [Disp mode item] of the setup program sold separately,

this setting item will no longer appear in display mode. (The default setting is enabled.)

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6. Settings (Display Mode)

6-4 Display mode settings

6-4-6 Setting a Bluetooth device connection
Sets the connection to a Bluetooth device when the Bluetooth function is enabled.
Setting this item to [ON] allows communication with a smartphone on which the dedicated app has been
downloaded. The default setting is [OFF].

NOTE The Bluetooth device connection setting is retained even when the power is turned off.
 The Bluetooth function is optional (specified at time of order).
 RK Link (the dedicated app) can be downloaded free of charge from Google Play or App Store.
 By default, the Bluetooth function automatically turns [OFF] if no communication occurs for fiveminutes while the function is turned [ON]. This setting can be altered using the data logger
management program sold separately.
 If the BLE connection function is disabled in [Disp mode item] of the setup program sold separately,

this setting item will no longer appear in display mode. (The default setting is enabled.)

1

Press the DISP/ESC button several
times on the measurement mode
screen to display the BLUETOOTH
screen.

2

Press the POWER/ENTER button.
If you do not wish to set, press the
DISP/ESC button.

3

Press the ▲/AIR or RESET/▼ button to select [ON]or [OFF].

4

Press the POWER/ENTER button.

The Bluetooth device connection is set.
[SETTING] appears followed by [END], and the display
returns to the screen in Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 4.

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6. Settings (Display Mode)

6-4 Display mode settings

6-4-7 Setting the buzzer volume
Selects the buzzer volume setting.
The volume can be selected as [HIGH] or [LOW]. The default setting is [HIGH].

NOTE The buzzer volume setting is retained even when the power is turned off.
 If the buzzer volume adjustment function is disabled in [Disp mode item] of the setup program soldseparately, this setting item will no longer appear in display mode. (The default setting is enabled.)

1

Press the DISP/ESC button several
times on the measurement mode
screen to display the BUZZERVOLUME screen.

2

Press the POWER/ENTER button.
If you do not wish to set, press the
DISP/ESC button.

3

Press the ▲/AIR or RESET/▼ button to select[HIGH] or [LOW].

4

Press the POWER/ENTER button.

The buzzer volume is set.
[SETTING] appears followed by [END], and the display
returns to the screen in Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 4.

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6. Settings (Display Mode)

6-4 Display mode settings

6-4-8 Switching display language to English (ATEX/IECEx model)
Returns the display language to English.

NOTE This can be set with the ATEX/IECEx model when a language other than English has been set. The

item does not appear in display mode in other cases.
 The display language setting is retained even when the power is turned off.
 Set the display language using [LANGUAGE] in user mode. (Refer to ‘7-4-5 Setting the display

language’.) If the return to English display function is disabled in [Disp mode item] of the setup program soldseparately, this setting item will no longer appear in display mode. (The default setting is enabled.)

1

Press the DISP/ESC button several
times on the measurement mode
screen to display the LANGUAGE
CHANGE screen.

2

Press the POWER/ENTER button.
If you do not wish to set, press the
DISP/ESC button.

3

Press the POWER/ENTER button.

The display switches to English.
[END] appears and the display returns to the screen in
Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 3.

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6. Settings (Display Mode)

6-4 Display mode settings

6-4-9 Switching display language to Japanese (Japan Ex model)
Returns the display language to Japanese.

NOTE This can be set with the Japan Ex model when a language other than Japanese has been set. The

item does not appear in display mode in other cases.
 The display language setting is retained even when the power is turned off.
 Set the display language using [LANGUAGE] in user mode. (Refer to ‘7-4-5 Setting the display

language’.) If the return to Japanese display function is disabled in [Disp mode item] of the setup program soldseparately, this setting item will no longer appear in display mode. (The default setting is enabled.)

1

Press the DISP/ESC button several
times on the measurement mode
screen to display the LANGUAGE
screen.

2

Press the POWER/ENTER button.
If you do not wish to set, press the
DISP/ESC button.

3

Press the POWER/ENTER button.

The display switches to Japanese.
[終了] (END) appears, and the display returns to thescreen in Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 3.

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7. Settings (User Mode)

7-1 User mode display items

7

Settings (User Mode)
7-1 User mode display items
LCD display

Details

Reference

BUMP TESTGAS CAL

Performs a bump test.

8-3 Performing bump tests

Performs fresh air adjustment, CO2 zeroadjustment, base gas adjustment, and span
adjustment.
CO2 zero adjustment is performed when acarbon dioxide sensor is installed.
Base gas adjustment is performed when asensor (TEF sensor) requiring base gas
adjustment is installed.

8-2 Performing gas
adjustment

Sets the gas alarm setpoints, alarm type, andalarm pattern for each sensor. Alarm
setpoints can also be returned to their default
settings.

7-3 Gas alarm settings

Enables and disables the buzzer.

7-4-1 Setting the buzzer

Sets whether to performfresh air adjustment
for the carbon dioxide sensor during fresh air
adjustment.
This is displayed when a carbon dioxide
sensor is installed.

7-4-2 Enabling/disabling
CO2 fresh air adjustment

ALARM SETTINGBUZZER SETTING

CO2 AIR SET

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7. Settings (User Mode)LCD display

7-1 User mode display items

Details

Reference

TE BASE SELECT
Selects the gas type used for base gas
adjustment.
This is displayed when a sensor (TEF
sensor) requiring base gas adjustment isinstalled.

7-4-3 Selecting gas type forbase gas adjustment

The internal clock date (year, month, day)and time (hours and minutes) can be set.

7-4-4 Setting the date andtime

Sets the screen display language.

7-4-5 Setting the display
language

Displays the version information for themodules mounted in the product.

7-4-6 Displaying version
informationDATE

LANGUAGE

VERSION

START MEASURE

Switches to the measurement mode screen.

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7. Settings (User Mode)

7-2 Switching to user mode

7-2 Switching to user mode
1

Turn off the power.
Hold down the POWER/ENTER button.

2

Press POWER/ENTER and ▲/AIR buttons
simultaneously.

3

Release the buttons when the buzzer blips once.
The power turns on, and the user mode menu appears.

4

Press the ▲/AIR or RESET/▼ button to select theitem to be set.

NOTE
 A password input screen is displayed after Step 3 if the user mode password setting is enabled (thedefault setting is disabled). Press the ▲/AIR or RESET/▼ button to select a number, then press the
POWER/ENTER button to confirm. The user mode menu is displayed once the (four-digit) password
has been correctly entered. The default password setting is “0000”. Note that the password can bechanged using the setup program sold separately.

<Switching from user mode to measurement mode>1

Press the ▲/AIR or RESET/▼ button in user mode,
select [START MEASURE], then press the
POWER/ENTER button.
The product operates in the same way as when the
power has just been turned on and enters measurementmode.

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7. Settings (User Mode)

7-3 Gas alarm settings

7-3 Gas alarm settings
7-3-1 Setting alarm setpoints
Alarm setpoints can be set individually for each sensor. Alarm setpoints can be set in increments
corresponding to the resolution.
<R sensors>
Sensor

Detection target gas

Resolution

ESR-X13P

Oxygen (O2)

0.1 %ESR-A13i

Hydrogen sulfide (H2S)(low concentration)

0.1 ppm

ESR-A13P

Carbon monoxide (CO)1 ppm

Detection target gas

Resolution

Setting range
lower limit

Setting range
upper limit( ): recommended
range( ): recommended
range

0.0 %
25.0 %(19.5 % or less) (23.5 % or more)
0.5 ppm
200.0 ppm
(1.0 ppm or more)
12 ppm
2,000 ppm
(25 ppm or more)<F sensors>
Sensor

NCF-6322P

TEF-7520P

Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)
Acetylene (C2H2)
Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)

1 %LEL(10 %LEL or more)

60 %LEL

0.1 vol%

1.0 vol%(25.0 vol% or more)

100.0 vol%Methane (CH4)

0.5 %LEL

IRF-4345

Isobutane (HC (i-C4H10))

0.5 %LEL

IRF-4443

Carbon dioxide (CO2)0.01 vol%(0 – 5 vol%)0.10 vol%(5 – 20 vol%)ESF-A24R2

Hydrogen sulfide (H2S)(high concentration)

1 ppm

ESF-B242

Ammonia (NH3)0.5 ppm

ESF-C930

Chlorine (Cl2)0.01 ppm

ESF-B249

Ozone (O3)0.005 ppm

ESF-A24E2

Hydrogen chloride (HCl)0.05 ppm

ESF-A24D4

Sulfur dioxide (SO2)0.1 ppm

ESF-A24D(Japan Ex model)

Hydrogen cyanide(HCN)

0.1 ppm

Volatile organic
compounds(VOC, 10.6 eV, ppb)

Setting range
upper limit

1 %LELIRF-4341

PIF-001

Setting range
lower limit( ): recommended
range

0.0 %LEL(10 %LEL or more)
0.0 %LEL(10 %LEL or more)
1.00 vol%(5.00 vol% or more)
20 ppm(1,000 ppm)
10.0 ppm(25.0 ppm or more)
0.09 ppm(0.50 ppm or more)
0.035 ppm
(0.100 ppm or more)
0.35 ppm(2.00 ppm or more)
0.4 ppm(2.0 ppm or more)
0.9 ppm(5.0 ppm or more)

1 ppb(0 – 4,000 ppb)
0 ppb
(5,000 ppb or more)
10 ppb
(4,000 – 40,000 ppb)

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60.0 %LEL
60.0 %LEL

20.00 vol%1,000 ppm
75.0 ppm
1.50 ppm
0.600 ppm
6.00 ppm
100.0 ppm
15.0 ppm

40,000 ppb

7. Settings (User Mode)

7-3 Gas alarm settings

Sensor

Detection target gas

PIF-002

Volatile organic
compounds(VOC, 10.6 eV, ppm)

PIF-003

Volatile organic
compounds(VOC, 10.0 eV, ppm)

Resolution

Setting range
lower limit( ): recommended
range

0.1 ppm(0 – 400.0 ppm)
0.0 ppm(400.0 ppm or more)
1 ppm(400.0 – 4,000 ppm)
0.01 ppm(0 – 10.00 ppm)
0.00 ppm(5.00 ppm or more)
0.1 ppm(10.00 – 100.0 ppm)

Setting range
upper limit

4,000 ppm

100.0 ppm

NOTE
 Set the alarm setpoints as follows: First alarm ≤ second alarm (first alarm ≥ second alarm for L-H

alarm type) Use the product with the alarms set to within a range compatible with product performance. Alarm

setpoints below the recommended range may result in false alarms.
 The recommended range for the ESR-X13P (O2) applies when it is used as an oxygen deficiency

gauge (L alarm). For oxygen concentration measurements in inert gas (H alarm), the recommended
range is 5.0 vol% or more.
 The [STEL] and [TWA] setting screens do not appear when the STEL and TWA alarm setpoints areinvalid concentrations.

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7. Settings (User Mode)

7-3 Gas alarm settings

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [ALARM SETTING], then press
the POWER/ENTER button.

2

Check to confirm that [ALARM POINTS] is selected,
then press the POWER/ENTER button.

3

Press the ▲/AIR or RESET/▼ button to select thesensor, then press the POWER/ENTER button.

4

Press the ▲/AIR or RESET/▼ button to set the value
for the first alarm setpoint, then press the
POWER/ENTER button.

5

Press the ▲/AIR or RESET/▼ button to set the value
for the second alarm setpoint, then press the
POWER/ENTER button.

6

Press the ▲/AIR or RESET/▼ button to set the value
for the STEL alarm setpoint, then press the
POWER/ENTER button.

7

Press the ▲/AIR or RESET/▼ button to set the value
for the TWA alarm setpoint, then press the
POWER/ENTER button.

[END] appears, and the display returns to the screen in
Step 3.

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7. Settings (User Mode)

7-3 Gas alarm settings

NOTE
 Press the ▲/AIR or RESET/▼ button when setting an alarm setpoint to change the value inincrements corresponding to the resolution.
 Hold down the ▲/AIR or RESET/▼ button (for less than seven seconds) when setting an alarm

setpoint to change the value in increments corresponding to 10 times the resolution. In addition, holddown the button for seven seconds or more to change the value in increments corresponding to morethan 10 times the resolution.
 Press the DISP/ESC button when setting an alarm setpoint to return to the previous screen.
 To cancel the setting, press the DISP/ESC button several times to display the first alarm setpoint([WARNING]) setting screen, then press the DISP/ESC button.
 To return to the user mode menu, press the DISP/ESC button several times to display the alarm

setting menu, select [ESCAPE], then press the POWER/ENTER button.

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7. Settings (User Mode)

7-3 Gas alarm settings

7-3-2 Setting alarm type
Set the gas alarm type for each sensor.
These can be set as [H-HH], [L-LL], or [L-H]. The default setting is [H-HH] ([L-H] for oxygen (O2)).

NOTE The second alarm setpoint is automatically set to the same value as the first alarm setpoint in thefollowing cases:
・ When changed from [H-HH] or [L-H] to [L-LL]
・ When changed from [L-LL] to [H-HH] or [L-H]

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [ALARM SETTING], then press
the POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button to select[ALARM TYPE], then press the POWER/ENTER
button.

3

Press the ▲/AIR or RESET/▼ button to select thesensor, then press the POWER/ENTER button.

4

Press the ▲/AIR or RESET/▼ button to select analarm type.
Select [H-HH], [L-LL], or [L-H].

5

Press the POWER/ENTER button.
The alarm type is set.
[END] appears, and the display returns to the screen in
Step 3.
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7. Settings (User Mode)

7-3 Gas alarm settings

NOTE
 To cancel the setting, press the DISP/ESC button in Step 5.
 To return to the user mode menu, press the DISP/ESC button several times to display the alarm

setting menu, select [ESCAPE], then press the POWER/ENTER button.

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7. Settings (User Mode)

7-3 Gas alarm settings

7-3-3 Setting alarm pattern
Set the alarm pattern.
This can be set to [LATCHING] or [SELF RESET]. The default setting is [LATCHING].
1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [ALARM SETTING], then press
the POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button to select[ALARM LATCHING], then press the POWER/ENTER
button.

3

Press the ▲/AIR or RESET/▼ button to select[LATCHING] or [SELF RESET].

4

Press the POWER/ENTER button.
The alarm pattern is set.
[END] appears, and the display returns to the screen in
Step 2.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 4.
 To return to the user mode menu, select [ESCAPE] on the alarm setting menu, then press the

POWER/ENTER button.
 If self-latching is selected, the alarm is reset when the RESET/▼ button is pressed after the gas

concentration has returned to normal.
If auto reset is selected, the alarm is reset automatically once the gas concentration has returned tonormal.

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7. Settings (User Mode)

7-3 Gas alarm settings

7-3-4 Resetting alarm setpoints
This restores alarm setpoints to their default settings.

NOTE
 This item does not appear in user mode if the sensors installed are not the default sensors.
 For more information on alarm setpoint default settings, refer to ‘4-2 Gas alarm setpoints’.

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [ALARM SETTING], then press
the POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button to select[DEFAULT ALM-P], then press the POWER/ENTER
button.

3

Press the POWER/ENTER button.
To cancel the reset, press the DISP/ESC button.

4

Press the POWER/ENTER button.
To cancel the reset, press the DISP/ESC button.

The alarm setpoints are reset.
[END] appears, and the display returns to the screen in
Step 2.

NOTE
 To return to the user mode menu, select [ESCAPE] on the alarm setting menu, then press the

POWER/ENTER button.

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7. Settings (User Mode)

7-3 Gas alarm settings

7-3-5 Enabling/disabling the alarm function
Enable and disable the alarm function.
Gas alarms will not operate when the alarm function is set to [OFF]. The [NO ALARM] icon is also displayed
at the top of the screen.
The default setting is [ON].
1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [ALARM SETTING], then press
the POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button to select[ALARM ON], then press the POWER/ENTER button.

3

Press the ▲/AIR or RESET/▼ button to select [ON]or [OFF].

4

Press the POWER/ENTER button.
The alarm function is set.
[END] appears, and the display returns to the screen in
Step 2.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 4.
 To return to the user mode menu, select [ESCAPE] on the alarm setting menu, then press the

POWER/ENTER button.

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7. Settings (User Mode)

7-4 Other user mode settings

7-4 Other user mode settings
7-4-1 Setting the buzzer
Set the buzzer.
Select one of the following: The default setting is [ALL ON].
 [ALL ON]:The buzzer sounds in all situations. (Button operation tone, alarm tone, andwarning tone sound.) [ALL OFF]:The buzzer does not sound except for certain system abnormalities (ROM, RAM,
FRAM). (Button operation tone, alarm tone, and warning tone are muted)
 [BUTTON TONE OFF]: Only the button operation tone is muted. (Alarm tone and warning tone sound.)NOTE The buzzer always sounds for ROM, RAM, and FRAM abnormalities, regardless of the buzzer setting.

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [BUZZER SETTING], thenpress the POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button to select abuzzer setting.
Select [ALL ON], [ALL OFF], or [BUTTON TONE OFF].

3

Press the POWER/ENTER button.
The buzzer is set.
[END] appears, and the display returns to the screen in
Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 3.

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7. Settings (User Mode)

7-4 Other user mode settings

7-4-2 Enabling/disabling CO2 fresh air adjustment
Sets whether to perform fresh air adjustment for the carbon dioxide sensor during fresh air adjustment.
When this item is set to [ON], fresh air adjustment for the carbon dioxide sensor is performed during fresh
air adjustment. The default setting is [OFF].

NOTE
 This can be set only when a carbon dioxide sensor is installed. The item does not appear in user

mode in other cases.
 When fresh air adjustment is performed with the CO2 fresh air adjustment setting enabled, the carbon

dioxide sensor will be automatically set to 400 ppm for the air sucked in and not the actual carbon
dioxide concentration. Caution is required here, as this state no longer satisfies the normal productspecifications.
To set the carbon dioxide sensor to 0 ppm, perform CO2 zero adjustment. (Refer to ‘8-2-3 Performing
CO2 zero adjustment’.) Do not enable the CO2 fresh air adjustment setting when VOC sensors are installed. Correct
adjustment will not be possible due to the carbon dioxide (CO2) generated by the activated carbon
filter CF-8350.

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [CO2 AIR SET], then press the
POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button to select [ON]or [OFF].

3

Press the POWER/ENTER button.
Whether to perform fresh air adjustment for the carbon
dioxide sensor is set.
[END] appears, and the display returns to the screen in
Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 3.

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7. Settings (User Mode)

7-4 Other user mode settings

7-4-3 Selecting gas type for base gas adjustment
Selects the gas type used for base gas adjustment.
This can be set to [N2] or [INERT]. The default setting is [N2].

NOTE
 This can be set only when a sensor (TEF sensor) allowing base gas adjustment is installed. The item

does not appear in user mode in other cases.
 If a TEF sensor (methane (CH4) or isobutane (HC (i-C4H10)) type) and oxygen sensor are installed,base gas adjustment must also be performed after fresh air adjustment. (Refer to ‘8-2-4 Performingbase gas adjustment’.)
To perform normal automatic correction of high-concentration combustible gas measurement readings
using the oxygen sensor, select [N2] and perform base gas adjustment using nitrogen (N2) after fresh
air adjustment. (Refer to the ‘<The effects of coexisting gas on high-concentration combustible gas
sensors>’ note in ‘5-7-1 Measuring gas concentration’.) If a TEF sensor (methane (CH4) or isobutane (HC (i-C4H10)) type) is installed and no oxygen sensor isinstalled, and a TEF sensor (hydrogen (H2) type) is installed, fresh air adjustment is not applied.
Perform only base gas adjustment. (Refer to ‘8-2-4 Performing base gas adjustment’ and the ‘<The
effects of coexisting gas on high-concentration combustible gas sensors>’ note in ‘5-7-1 Measuring
gas concentration’.)
When measuring in air-based environments, the effects of the oxygen concentration in the air(20.9 %) can be minimized by selecting [N2] and performing base gas adjustment using air. (Refer tothe ‘<The effects of coexisting gas on high-concentration combustible gas sensors>’ note in ‘5-7-1
Measuring gas concentration’.)1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [TE BASE SELECT], thenpress the POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button to select [N2]or [INERT].

3

Press the POWER/ENTER button.
The gas type used for base gas adjustment is set.
[END] appears, and the display returns to the screen in
Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 3.

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7. Settings (User Mode)

7-4 Other user mode settings

7-4-4 Setting the date and time
The internal clock date (year, month, day) and time (hours and minutes) can be set.
Set the date and time in the sequence year → month → day → hours → minutes.
1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [DATE], then press the
POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button to set an itemof the date and time, then press the POWER/ENTER
button.
The item currently selected blinks.

3

Repeat Step 2.
After setting the minutes for the time, press the
POWER/ENTER button. [END] appears, and the display
returns to the screen in Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 2.
 Press the DISP/ESC button when setting the date (year, month, or day) or time (hours or minutes) toreturn to the previous screen.
 Pressing the DISP/ESC button when setting the year for the date returns to the user mode menu.

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7. Settings (User Mode)

7-4 Other user mode settings

7-4-5 Setting the display language
Sets the screen display language. The default setting for the Japan Ex model is [JAPANESE]. The default
setting for the ATEX/IECEx model is [ENGLISH].
The following languages are available: [ENGLISH]
 [JAPANESE]
 [ITALIAN]
 [SPANISH]
 [GERMAN] [FRENCH]
 [PORTUGUESE]
 [RUSSIAN]
 [KOREAN]
 [CHINESE(SC)] (simplified Chinese) [CHINESE(TC)] (traditional Chinese) [VIETNAMESE]
 [POLISH]
 [TURKISH]
 [SLOVAK] [CZECH]
1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [LANGUAGE], then press the
POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button to select a
language.

3

Press the POWER/ENTER button.
[END] appears, and the display returns to the screen in
Step 1.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 3.

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7. Settings (User Mode)

7-4 Other user mode settings

7-4-6 Displaying version information
Displays the version information for the modules mounted in the product.
The following information can be displayed:
 Main PCB version
 Sensor PCB version
 R sensor versions
 F sensor (F1/F2/F3) versions
 Option (Bluetooth (BLE) function) version
 PID table version

NOTE
 The information for [ROM] and [SUM] in [MAIN BOARD VER] is displayed as [----] while they arebeing calculated.

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [VERSION], then press the
POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button to select theversion information to be displayed.

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7. Settings (User Mode)3

7-4 Other user mode settings

Press the POWER/ENTER button.
[END] appears, and the display returns to the screen in
Step 1.

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8. Maintenance

8-1 Maintenance intervals and items

8

Maintenance
The product is an important safety and disaster-prevention device.
Maintain and inspect the product at regular intervals to ensure performance and to improve disasterprevention and safety reliability.

8-1 Maintenance intervals and items
The following items should be maintained regularly before using the product: Daily maintenance:
Perform maintenance before work.
 Monthly maintenance: Perform maintenance by testing the alarms once a month.
 Regular maintenance: Perform maintenance at least once a year (ideally, at least once every six months).
Inspection item

Inspection details

Daily
Monthly
Regularmaintenance maintenance maintenanceBattery level

Check to confirm that battery levels are adequate.

〇

〇

〇

Concentration
display

Check to confirm that the concentration reading is 0 (or20.9 % on oxygen meter) after drawing in clean air. If thereading is not 0, check to confirm that no miscellaneous
gases are present, then perform fresh air adjustment.

〇

〇

〇

Main unit
operation

Check the LCD display to confirm the absence of fault
indication.

〇

〇

〇

Check to confirm that the filters are not dirty.

〇

〇

〇

Test the alarms and check to confirm that the alarm LED
arrays and buzzer operate correctly.

－

〇

〇

Span adjustment

Perform span adjustment using a calibration gas.

－

－

〇

Gas alarm check

Check the gas alarm with a calibration gas.

－

－

〇

FilterAlarm test

WARNING If you encounter a product abnormality, contact RIKEN KEIKI immediately.

NOTE Perform span adjustment using calibration gas once every six months.
 Span adjustment requires dedicated tools and preparation of a calibration gas. Always contact RIKEN

KEIKI for span adjustment.
 The built-in sensors have finite service lives and must be replaced regularly.
 If the sensors cannot be adjusted using span adjustment, the readings are not restored after fresh air

adjustment, or the readings fluctuate, the sensors are at the end of their life. Contact RIKEN KEIKI.
For more information on sensor warranty periods, refer to ‘12-8-2 Sensor warranty’.

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8. Maintenance

8-1 Maintenance intervals and items

 The dustproof and waterproof construction rating of IP66/68 (IPx8 indicates no water ingress will

occur if the product is immersed to a depth of two meters for one hour) does not refer to whether or
not the product is capable of detecting gas during or after exposure to the corresponding conditions.
Be sure to remove any dust or water.

<Maintenance service>
RIKEN KEIKI provides services related to regular maintenance, including span adjustment, as well as otheradjustments and maintenance.
Preparing calibration gas requires dedicated tools, such as gas cylinders of the specified concentration andgas sampling bags.
Our certified service engineers have expert knowledge of the dedicated tools and products. Please takeadvantage of the RIKEN KEIKI maintenance service to maintain safe operation of the product.
The major maintenance service items are as follows. Please contact RIKEN KEIKI for more information.
Service

Service details

Battery level check

Checks the battery levels.

Concentration display
check

Checks to confirm that the concentration reading is zero (20.9 % for oxygen
concentration reading and 400 – 500 ppm for carbon dioxide reading) using a zerogas.
Fresh air adjustment (zero adjustment) is performed if the reading is not zero.

Filter check

Checks the dust filter for contamination and clogging.
The filter is replaced if dirty or clogged.

Alarm test

Alarm tests are performed to confirm that the alarm lamps and buzzer operatecorrectly.

Span adjustment

Adjusts sensitivity using a calibration gas.

Gas alarm check

Checks the gas alarm using a calibration gas.
・ Alarm check (Confirms alarm activation when alarm setpoint is reached.)
・ Delay time check (Checks delay time until alarm activation.)・ Buzzer, lamps, and concentration reading check (Checks operation for each of
the two-step alarms.)

Product cleaning andrepair (visual inspection)

Checks the product exterior for dirt and cleaning/repairing of visible areas.
Replaces parts that are cracked or damaged.

Product operation check

Operates the buttons to check function operations and parameters.

Consumable part
replacement

Replaces degraded components such as sensors and filters.

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8-2 Performing gas adjustment
Gas adjustment requires dedicated tools and a calibration gas.
Contact RIKEN KEIKI to request gas readjustment.

CAUTION Do not use lighter gas to check the sensitivity of the product. Constituents in lighter gas may degrade
sensor performance.
 Due to the sensor characteristics, an accurate reading may not be displayed immediately after turningon the power. Allow the product to warm up for at least one minute to allow the reading to stabilize
before use. Allow the product to warm up for at least 10 minutes before performing gas adjustment.

8-2-1 Preparation for gas adjustment<Required equipment/materials>
 Calibration gas (sold separately) Gas sampling bag (sold separately) or demand flow valve (sold separately)** Used to extract gas from the gas cylinder.

<Gas supply method>
Connect the gas sampling bag or demand flow valve (and gas cylinder) as shown below to draw in thecalibration gas, then adjust once the reading has risen. For information on the calibration gas type and time
taken to draw in the calibration gas, refer to ‘<Recommended calibration gas concentration and introductiontime>’.

Using a gas sampling bag
Gas inlet(GAS IN)

Gas outlet(GAS OUT)

Gas samplingrodGassamplingbag

Using a demand flow valve (and gas cylinder)
Gas inlet(GAS IN)

Demand flowvalve
Gas samplingrod

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Gas outlet(GAS OUT)

8. Maintenance

8-2 Performing gas adjustment<Recommended calibration gas concentration and introduction time><R sensors>
Sensor

Detection target gas

Calibration gas

Calibration gas
concentration

Gas introduction
time

ESR-X13P

Oxygen (O2)

Oxygen (O2)
Nitrogen (N2) diluted

12.0 %

60 seconds

Hydrogen sulfide (H2S)(low concentration)
Carbon monoxide (CO)Hydrogen sulfide (H2S)

25.0 ppm

60 seconds

Carbon monoxide (CO)50 ppm60 seconds

Detection target gas

Calibration gas

Calibration gas
concentration

Gas introduction
time

Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)
Acetylene (C2H2)
Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)Methane (CH4)
Isobutane (HC (i-C4H10))
Carbon dioxide (CO2)

50 %LEL

60 seconds

50 vol%60 seconds

50 %LEL/80 vol%50 %LEL/80 vol%14 vol%60 seconds
60 seconds
60 seconds

Hydrogen sulfide (H2S)

25 ppm60 seconds

ESF-B242
ESF-C930

Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)
Acetylene (C2H2)
Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)Methane (CH4)
Isobutane (HC (i-C4H10))
Carbon dioxide (CO2)
Hydrogen sulfide (H2S)(high concentration)
Ammonia (NH3)
Chlorine (Cl2)

40 ppm0.80 ppm

120 seconds
120 seconds

ESF-B249

Ozone (O3)

Depends on
calibration gas*1

120 seconds

ESF-A24E2
ESF-A24D4

Hydrogen chloride (HCl)
Sulfur dioxide (SO2)

3.2 ppm
3.2 ppm

120 seconds
120 seconds

ESF-A24D(Japan Ex model)

Hydrogen cyanide (HCN)

Ammonia (NH3)
Chlorine (Cl2)
Ozone (O3)orchlorine (Cl2)
Hydrogen chloride (HCl)
Sulfur dioxide (SO2)
Hydrogen cyanide (HCN)orphosphine (PH3)

Depends on
calibration gas*2

120 seconds

Isobutylene (C4H8)

20,000 ppb

60 seconds

Isobutylene (C4H8)

100 ppm

60 seconds

Isobutylene (C4H8)

20 ppm60 seconds

ESR-A13i
ESR-A13P<F sensors>
Sensor
NCF-6322P

TEF-7520P
IRF-4341
IRF-4345
IRF-4443
ESF-A24R2

PIF-001
PIF-002
PIF-003

Volatile organic
compounds(VOC, 10.6 eV, ppb)
Volatile organic
compounds(VOC, 10.6 eV, ppm)
Volatile organic
compounds(VOC, 10.0 eV, ppm)

*1: The gas concentration the ESF-B249 differs depending on the calibration gas used. Perform gas adjustment using either ofthe following gas concentrations:
When using ozone (O3) (actual gas):0.16 ppm
When using chlorine (Cl2) (replacement gas):0.16 ÷ (conversion factor) ppm*2: The gas concentration the ESF-A24D differs depending on the calibration gas used. Perform gas adjustment using either ofthe following gas concentrations:
When using hydrogen cyanide (HCN) (actual gas): 8 ppm
When using phosphine (PH3) (replacement gas):
8 ÷ (conversion factor) ppm

NOTE The recommended calibration gas concentration and introduction time are the same as above thebump test also.
 The figures given above are the recommended calibration gas concentrations. The concentration

should be set and gas adjustment performed if different calibration gas concentrations are used.

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WARNING Do not apply pressure to the gas sampling bag when attaching it. Otherwise this may cause thecalibration gas to leak inside, preventing correct adjustment.
About the calibration gas
 Calibration gases include hazardous gases (e.g., combustible gases, toxic gases, oxygen deficiency).
Take care when handling the gases and the related equipment.
Gas sampling bag
 Use different gas sampling bags for each gas type and concentration to ensure accurate adjustment.
Gas adjustment location
 Do not perform gas adjustment in a confined space.
 Do not perform gas adjustment in locations where gases such as silicone and spray can gases areused.
 Perform gas adjustment in an environment as close as possible to the gas measurement environment.
 Calibration gases include hazardous gases (e.g., combustible gases, toxic gases, oxygen deficiency).
Always perform adjustment in an exhaust booth or recover the calibration gas by attaching an exhaust
bag to the gas outlet (GAS OUT).
Gas adjustment using a replacement gas and conversion factor
 When adjusting with a replacement gas, calculate the calibration gas concentration by multiplaying the
replacement gas concentration  by the conversion factor.
Example: For ESF-B249 (O3)
Chlorine (Cl2) (replacement gas) concentration × conversion factor = Ozone (O3) (calibrationgas) concentration
 The conversion factor is printed on the underside of the sensor.

Sensor underside

Typical label indicating replacement gas andconversion factor(Example: Replacement gas: Chlorine (Cl2),
conversion factor: 1.9)

CAUTION Keep in mind that using a gas mixture to perform span adjustment may affect indication accuracy. Thisis due to interference by gases other than the target gas. Refer to ‘12-6 List of interference gases forelectrochemical type sensors’ to avoid combinations of gases that are known to cause interference.

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8. Maintenance

8-2 Performing gas adjustment<Gas adjustment menu>
Gas adjustment is performed using [GAS CAL] in user mode.
The following menu displayed in [GAS CAL] allows individual items to be run and set.
[GAS CAL][AIR CAL][CO2 ZERO CAL] (when carbon dioxide sensor is installed)[BASE CAL] (when combustible gas (vol%) sensor (TEF) is installed)[SPAN CAL][CYLINDER A] to [CYLINDER F][START MEASURE][SETTING CAL-P][CYL SETTING][SPAN GAS SELECT] (when VOC sensor is installed)[ESCAPE][ESCAPE]NOTE With the power turned off, press the POWER/ENTER button and ▲/AIR button simultaneously toswitch to user mode. (Refer to ‘7-2 Switching to user mode’.) To exit [GAS CAL], press the ▲/AIR or RESET/▼ button several times to select [ESCAPE], thenpress the POWER/ENTER button. The display returns to the user mode menu.
 To exit [SPAN CAL], press the ▲/AIR or RESET/▼ button several times to select [ESCAPE], thenpress the POWER/ENTER button. The display returns to the [GAS CAL] menu.
 It is possible to enter measurement mode from [SPAN CAL]. Press the ▲/AIR or RESET/▼ button

several times in [SPAN CAL] to select [START MEASURE], then press the POWER/ENTER button.
User mode ends, and the product enters measurement mode after performing the same operation as
when the power is turned on.

WARNING Return to measurement mode manually once gas adjustment ends. The product will not automatically
return to measurement mode from user mode.

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8-2-2 Performing fresh air adjustment
Fresh air adjustment must be performed before measuring gas concentration.
For information on individual sensor adjustment methods and precautions, refer to ‘5-6 Performing fresh air
adjustment in measurement mode’.

NOTE<GX-9000H>
 Perform fresh air adjustment separately in H2S high concentration measurement mode and H2S low
concentration measurement mode. Press the ▲/AIR and RESET/▼ buttons simultaneously. The
buzzer blips once, and the product switches between H2S high concentration measurement mode andH2S low concentration measurement mode.

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [GAS CAL], then press the
POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button in the [GASCAL] menu to select [AIR CAL], then press the
POWER/ENTER button.

3

Hold down the ▲/AIR button.

Fresh air adjustment is performed.
Keep the ▲/AIR button pressed for as long as thescreen shown on the right is displayed.

4

Release the ▲/AIR button once [RELEASE] appearson the screen.

Once fresh air adjustment has beensuccessfully completed, the result is
displayed, and the concentration after
fresh air adjustment is then displayed.

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The display returns to the screen in Step 2.

NOTE
 If fresh air adjustment fails, [FAIL] appears in the gas concentration display area for the failed sensor.

Press the RESET/▼ button to reset the fault alarm (adjustment failure). Fresh air adjustment will not
be performed on the sensor for which fresh air adjustment failed, and the current gas concentration isdisplayed.
 If fresh air adjustment fails, repeat fresh air adjustment in clean air. If fresh air adjustment still fails,

the sensor is likely to be faulty. Contact RIKEN KEIKI.

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8-2-3 Performing CO2 zero adjustment
CO2 zero adjustment must be performed if a carbon dioxide sensor is installed.
CO2 zero adjustment can be performed by using either nitrogen (N2) for the calibration gas or the CF-284
CO2 removal filter.

WARNING Carbon dioxide (CO2) is present in the air at a concentration of between approximately 400 and 500 ppm.
Correct gas concentration measurements are not possible if CO2 zero adjustment is performed in air
without the CF-284 CO2 removal filter.

CAUTION Do not draw in carbon dioxide (CO2) during CO2 zero adjustment.
 Do not breathe into the gas inlet during CO2 zero adjustment.

NOTE
 If no sensors requiring CO2 zero adjustment are installed, [CO2 ZERO CAL] will not appear in theuser mode [GAS CAL] menu.

<When using nitrogen (N2) for the calibration gas>
When using nitrogen (N2) for the calibration gas, introduce via GAS IN for approximately 60 seconds.
Gas inlet(GAS IN)

Gas samplingrodGassampling
bag

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Gas outlet(GAS OUT)

8. Maintenance

8-2 Performing gas adjustment<When using the CF-284 CO2 removal filter>
If nitrogen (N2) is not used for the calibration gas, the CF-284 CO2 removal filter must be used to remove
carbon dioxide (CO2) from the air. Attach the CF-284 CO2 removal filter with the arrow on the side pointing
toward the gas inlet (GAS IN) of the main unit, then draw in air for approximately 60 seconds before startingCO2 zero adjustment.

CO2 removal filter
CF-284
Use upright with thearrow (↓) pointing
toward the inlet

Gas sampling rod

Gas inlet

CAUTION Use the CO2 removal filter held upright. Drawing in air with the filter horizontal may allow air to passthrough the top of the CO2 removal filter cylinder, preventing carbon dioxide (CO2) in the air from being
absorbed.
 After using the CO2 removal filter, seal it from the air. The absorbing agent will absorb carbon dioxide(CO2) from the air if left exposed to air, reducing absorbency.
 Store the CO2 removal filter in a dry location not exposed to direct sunlight.

NOTE
 The number of times a CO2 removal filter can be used depends on the concentration of carbon

dioxide in the air. It also depends on the airtightness of the filter and the storage temperature andhumidity.
 The following table gives guideline figures for the number of uses when used to draw in air for one
minute at a time. Provide a margin of error in cases in which the environmental concentration ofcarbon dioxide cannot be determined.
Carbon dioxide concentration inmeasurement environment

Expected number ofuses

500 ppm

Approx. 1,000 times

1,000 ppm

Approx. 500 times

2,000 ppm

Approx. 200 times

4,000 ppm

Approx. 100 times

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1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [GAS CAL], then press the
POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button in the [GASCAL] menu to select [CO2 ZERO CAL], then press
the POWER/ENTER button.

3

Introduce nitrogen (N2), wait 60 seconds, then press
the POWER/ENTER button.

CO2 zero adjustment is performed.

Once CO2 zero adjustment has beensuccessfully completed, the result is
displayed, and the concentration after
CO2 zero adjustment is thendisplayed.

The display returns to the screen in Step 2.

NOTE
 If CO2 zero adjustment fails, [FAIL] appears in the gas concentration display area for the carbon

dioxide sensor.
Press the RESET/▼ button to reset the fault alarm (adjustment failure). CO2 zero adjustment will not
be performed if CO2 zero adjustment failed, and the current gas concentration is displayed.
 To cancel CO2 zero adjustment, press the DISP/ESC button in Step 3.
 When fresh air adjustment is performed with the CO2 fresh air adjustment setting enabled, the carbon

dioxide sensor will be automatically set to 400 ppm for the air sucked in and not the actual carbon
dioxide concentration. (Refer to ‘7-4-2 Enabling/disabling CO2 fresh air adjustment’.) Caution isrequired here, as this state no longer satisfies the normal product specifications.
To set the carbon dioxide sensor to 0 ppm, perform CO2 zero adjustment.

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8-2-4 Performing base gas adjustment
If a TEF sensor is installed, base gas adjustment must be performed after fresh air adjustment.

WARNING Use nitrogen (N2) or inert gas (assumed as nitrogen (N2): 86 vol%, carbon dioxide (CO2): 14 vol%) forthe calibration gas for base gas adjustment.
 If a TEF sensor (methane (CH4) or isobutane (HC (i-C4H10)) type) and oxygen sensor are installed,base gas adjustment must also be performed after fresh air adjustment. (Refer to ‘8-2-4 Performingbase gas adjustment’.)
To perform normal automatic correction of high-concentration combustible gas measurement readings
using the oxygen sensor, select [N2] for the base gas adjustment gas (refer to ‘7-4-3 Selecting gas
type for base gas adjustment’) and perform base gas adjustment using nitrogen (N2) after fresh air
adjustment. (Refer to the ‘<The effects of coexisting gas on high-concentration combustible gas
sensors>’ note in ‘5-7-1 Measuring gas concentration’.) If a TEF sensor (methane (CH4) or isobutane (HC (i-C4H10)) type) is installed and no oxygen sensor isinstalled, and a TEF sensor (hydrogen (H2) type) is installed, fresh air adjustment is not applied.
Perform only base gas adjustment. (Refer to the ‘<The effects of coexisting gas on high-concentration
combustible gas sensors>’ note in ‘5-7-1 Measuring gas concentration’.)Note that drawing in air after base gas adjustment will cause the zero point to drift as follows:
Gas used for base gas adjustment
Nitrogen (N2)
Inert gas*
TEF sensor (methane (CH4) type)1.5 – 2.6 vol%0.6 – 1.6 vol%TEF sensor (isobutane (HC (i-C4H10)) type)1.4 – 4.5 vol%1.0 – 3.3 vol%TEF sensor (hydrogen (H2) type)0.2 – 0.6 vol%1.2 – 1.6 vol%* Inert gas is assumed to be nitrogen (N2): 86 vol%, carbon dioxide (CO2): 14 vol%TEF sensor specifications

However, the readings may not fluctuate even when air is introduced after base gas adjustment, as
TEF sensor readings do not fluctuate around zero up to 0.9 vol% due to the zero suppression function(default setting: enabled). (Refer to ‘12-3 Zero suppression function’.)
When measuring in air-based environments, the effects of the oxygen concentration in the air (20.9 %)can be minimized by selecting [N2] as the gas for base gas adjustment (refer to ‘7-4-3 Selecting gas
type for base gas adjustment’) and performing base gas adjustment using air. (Refer to the ‘<The
effects of coexisting gas on high-concentration combustible gas sensors>’ note in ‘5-7-1 Measuring
gas concentration’.)NOTE The calibration gas used for base gas adjustment can be set using [TE BASE SELECT] in user mode.

(Refer to ‘7-4-3 Selecting gas type for base gas adjustment’.) If no sensors requiring base gas adjustment are installed, [BASE CAL] will not appear in the user

mode [GAS CAL] menu.

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8-2 Performing gas adjustment

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [GAS CAL], then press the
POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button in the [GASCAL] menu to select [BASE CAL], then press the
POWER/ENTER button.

3

Introduce the base gas adjustment gas, wait 120
seconds, then press the POWER/ENTER button.
For the gas type used for base gas adjustment, use thegas (nitrogen (N2) or inert gas) selected for [TE BASE
SELECT] in user mode.

Base gas adjustment is performed.

Once base gas adjustment has beensuccessfully completed, the result is
displayed, and the concentration after
base gas adjustment is then displayed.

The display returns to the screen in Step 2.

NOTE
 If base gas adjustment fails, [FAIL] appears in the gas concentration display area for the failed TEF

sensor.
Press any button other than ▲/AIR to reset the fault alarm (adjustment failure). Base gas adjustment
will not be performed on the TEF sensor for which base gas adjustment failed, and the current gas
concentration is displayed.
 To cancel base gas adjustment, press the DISP/ESC button in Step 3.

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8-2-5 Setting span adjustment
The cylinders, calibration gas concentration, and calibration gas can be set for span adjustment.

<Setting the cylinders>
Set the sensor groups (cylinders) for calibration. When using cylinders with mixtures of multiple gases, gas
adjustment can be performed simultaneously for the gases set to the same cylinder. Set based on thecylinders used.
<GX-9000>
Cylinders A to F can be set.
<GX-9000H>
The following settings are available for each sensor:
Sensor

Cylinder setting range

R1

A to FR2

A to CR3

A to CF1

D to FF2

D to FF3

A to CThe default cylinder settings are as follows:
SensorSensor model
Detection target gas
slot
R1
ESR-X13P
Oxygen (O2)R2

ESR-A13i

Hydrogen sulfide (H2S) low concentration

R3

ESR-A13P
IRF-4443
ESF-A24R2
ESF-B242
ESF-C930
ESF-B249
ESF-A24E2
ESF-A24D4
ESF-A24D
PIF-001
PIF-002
PIF-003

Carbon monoxide (CO)Carbon dioxide (CO2)
Hydrogen sulfide (H2S) high concentration
Ammonia (NH3)
Chlorine (Cl2)
Ozone (O3)
Hydrogen chloride (HCl)
Sulfur dioxide (SO2)
Hydrogen cyanide (HCN) (Japan Ex models
Volatile organic compounds (VOC, 10.6 eV, ppb)
Volatile organic compounds (VOC, 10.6 eV, ppm)
Volatile organic compounds (VOC, 10.0 eV, ppm)
Methane (CH4), isobutane (HC (i-C4H10)),hydrogen (H2)Methane (CH4)
Isobutane (HC (i-C4H10))
Methane (CH4), isobutane (HC (i-C4H10))
Hydrogen (H2), acetylene (C2H2)
Carbon dioxide (CO2)F1

TEF-7520P
F2

F3

IRF-4341
IRF-4345
NCF-6322P
IRF-4443

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Default cylinder
settingA
B (Japan Ex model)
A (ATEX/IECEx model)ADE
E (range [H])A (range [L])A
CC

8. Maintenance

8-2 Performing gas adjustment

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [GAS CAL], then press the
POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button in the [GASCAL] menu to select [SPAN CAL], then press the
POWER/ENTER button.

3

Press the ▲/AIR or RESET/▼ button to select [CYL
SETTING], then press the POWER/ENTER button.

4

Press the ▲/AIR or RESET/▼ button to select thesensor, then press the POWER/ENTER button.

5

Press the ▲/AIR or RESET/▼ button to set thesensor, then press the POWER/ENTER button.
Press the button repeatedly to cycle through thefollowing settings [A] → [B] → [C] … [F].
Note that cylinders that cannot be set will not be
displayed.
[END] appears, and the display returns to the screen in
Step 4.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 5.
 With a double-range IRF sensor (methane (CH4), isobutane (HC (i-C4H10))) that allows adjustment for

both high and low concentrations, [H] or [L] can be selected when the sensor is selected.
<High concentration><Low concentration>

 With a double-range IRF sensor (methane (CH4), isobutane (HC (i-C4H10))) that allows adjustment for

both high and low concentrations, the same cylinder cannot be set for both high and low concentrations.

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8. Maintenance

8-2 Performing gas adjustment<Setting the gas concentration for span adjustment>
The calibration gas concentration for span adjustment can be set within the following ranges for each sensor.
Gas concentration can be set in increments corresponding to the resolution.
<R sensors>
Detection target gas

Resolution

Setting range
lower limit

Setting range
upper limit

ESR-X13P

Oxygen (O2)

0.1 %

0.0 %

18.0 %ESR-A13i

Hydrogen sulfide (H2S)(low concentration)

0.1 ppm

1.0 ppm

200.0 ppm

ESR-A13P

Carbon monoxide (CO)1 ppm

15 ppm

2,000 ppm

Sensor

Detection target gas

Resolution

Setting range
lower limit

Setting range
upper limit

NCF-6322P

Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)
Acetylene (C2H2)

1 %LEL

5 %LEL

75 %LEL

TEF-7520P

Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)

0.1 vol%

5.0 vol%

100.0 vol%IRF-4341

Methane (CH4)

0.5 %LEL/0.1 vol%0.0 %LEL/
0.0 vol%

100.0 %LEL/
100.0 vol%IRF-4345

Isobutane (HC (i-C4H10))

0.5 %LEL/0.1 vol%0.0 %LEL/
0.0 vol%

100.0 %LEL/
100.0 vol%IRF-4443

Carbon dioxide (CO2)0.01 vol% (0 – 5 vol%)0.10 vol% (5 – 20 vol%)0.0 vol%

20.00 vol%ESF-A24R2

Hydrogen sulfide (H2S)(high concentration)

1 ppm

20 ppm

1,000 ppm
75.0 ppm

Sensor<F sensors>

ESF-B242

Ammonia (NH3)0.5 ppm

10.0 ppm

ESF-C930

Chlorine (Cl2)0.01 ppm

0.09 ppm

1.50 ppm

ESF-B249

Ozone (O3)0.005 ppm

0.035 ppm

0.600 ppm

ESF-A24E2

Hydrogen chloride (HCl)0.05 ppm

0.35 ppm

6.00 ppm

ESF-A24D4

Sulfur dioxide (SO2)0.1 ppm

0.4 ppm

100.0 ppm

ESF-A24D(Japan Ex model)

Hydrogen cyanide (HCN)

0.1 ppm

0.9 ppm

15.0 ppm

1

PIF-001

Volatile organic compounds
1 ppb (0 – 4,000 ppb)
(VOC, 10.6 eV, ppb)
10 ppb (4,000 – 40,000 ppb)

0 ppb

40,000 ppb

PIF-002

Volatile organic compounds(VOC, 10.6 eV, ppm)

0.1 ppm (0 – 400.0 ppm)
1 ppm (400.0 – 4,000 ppm)

0.0 ppm

4,000 ppm

PIF-003

Volatile organic compounds 0.01 ppm (0 – 10.00 ppm)
(VOC, 10.0 eV, ppm)
0.1 ppm (10.00 – 100.0 ppm)

0.00 ppm

100.0 ppm

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [GAS CAL], then press the
POWER/ENTER button.

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2

Press the ▲/AIR or RESET/▼ button in the [GASCAL] menu to select [SPAN CAL], then press the
POWER/ENTER button.

3

Press the ▲/AIR or RESET/▼ button to select[SETTING CAL-P], then press the POWER/ENTER
button.

4

Press the ▲/AIR or RESET/▼ button to select thesensor, then press the POWER/ENTER button.

5

Press the ▲/AIR or RESET/▼ button to set the gas
concentration for span adjustment, then press the
POWER/ENTER button.

The display returns to the screen in Step 4.

NOTE
 Press the ▲/AIR or RESET/▼ button when setting the gas concentration for span adjustment tochange the value in increments corresponding to the resolution.
 Hold down the ▲/AIR or RESET/▼ button (for less than seven seconds) when setting the gas

concentration for span adjustment to change the value in increments corresponding to 10 times theresolution. In addition, hold down the button for seven seconds or more to change the value inincrements corresponding to more than 10 times the resolution.
 To cancel the setting, press the DISP/ESC button in Step 5.
 With a double-range IRF sensor (methane (CH4), isobutane (HC (i-C4H10))) that allows adjustment for
both high and low concentrations, [H] or [L] can be selected when the sensor is selected.
<High concentration><Low concentration> The recommended calibration gas concentrations for use in span adjustment are described in ‘8-2-1

Preparation for gas adjustment’.

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8. Maintenance

8-2 Performing gas adjustment<Setting the calibration gas span adjustment>
Set the calibration gas used span adjustment.
The calibration gas can be set when a VOC sensor or sensor for which a replacement gas has been set(ozone (O3) or hydrogen cyanide (HCN) sensor) is installed.
The gas that can be selected for a VOC sensor are the gas set in the volatile organic compound (VOC)
conversion setting and isobutylene (C4H8).
For information on volatile organic compound (VOC) conversion settings, refer to ‘6-4-3 Volatile organic
compound (VOC) conversion gas selection’.

NOTE If a VOC sensor or sensor for which a replacement gas has been set (ozone (O3) or hydrogen cyanide(HCN) sensor) is not installed, [SPAN GAS SELECT] will not appear in the user mode [SPAN CAL] menu.

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [GAS CAL], then press the
POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button in the [GASCAL] menu to select [SPAN CAL], then press the
POWER/ENTER button.

3

Press the ▲/AIR or RESET/▼ button to select [SPANGAS SELECT], then press the POWER/ENTER
button.

4

Press the ▲/AIR or RESET/▼ button to select thesensor, then press the POWER/ENTER button.

5

Press the ▲/AIR or RESET/▼ button to select thecalibration gas for span adjustment, then press the
POWER/ENTER button.

[END] appears, and the display returns to the screen in
Step 4.

NOTE
 To cancel the setting, press the DISP/ESC button in Step 5.

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8. Maintenance

8-2 Performing gas adjustment

8-2-6 Performing span adjustment
Gas adjustment can be performed for the gas types selected from cylinders A to F. Prepare the gases forgas adjustment beforehand. (Refer to ‘8-2-1 Preparation for gas adjustment’.)

CAUTION Keep in mind that using a gas mixture to perform span adjustment may affect indication accuracy. Thisis due to interference by gases other than the target gas. Refer to ‘12-6 List of interference gases forelectrochemical type sensors’ to avoid combinations of gases that are known to cause interference.

NOTE Fresh air adjustment must always be performed before performing span adjustment.
 CO2 zero adjustment or fresh air adjustment (if enabled in ‘7-4-2 Enabling/disabling CO2 fresh air

adjustment’) must always be performed before span adjustment if a carbon dioxide sensor is installed.
 The calibration gas concentration, cylinders, and calibration gas can be set for span adjustment.

(Refer to ‘8-2-5 Setting span adjustment’.) When the automatic start after successful adjustment function is enabled and the cylinder setting is A

only, measurement will start automatically after a successful span adjustment.
The automatic start after successful adjustment function can be modified using the setup program
sold separately.

1

Press the ▲/AIR or RESET/▼ button in the user
mode menu to select [GAS CAL], then press the
POWER/ENTER button.

2

Press the ▲/AIR or RESET/▼ button in the [GASCAL] menu to select [SPAN CAL], then press the
POWER/ENTER button.

3

Press the ▲/AIR or RESET/▼ button to select thecylinder to be adjusted, then press the
POWER/ENTER button.
Pressing the button cycles through the settings in thefollowing sequence: [CYLINDER A] → [CYLINDER B] →… [CYLINDER F].
Note that cylinders not set will not be displayed.

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8. Maintenance4

8-2 Performing gas adjustment

Introduce the calibration gas for span adjustment,
wait 60 seconds, then press the POWER/ENTER
button.

Span adjustment is performed.

Once span adjustment has beensuccessfully completed, the result is
displayed, and the concentration after
span adjustment is then displayed.

The display returns to the screen in Step 3.

NOTE
 If span adjustment fails, [FAIL] appears in the gas concentration display area for the failed sensor.

Press any button other than ▲/AIR to reset the fault alarm (adjustment failure). Span adjustment will
not be performed on the sensor for which span adjustment failed, and the current gas concentration isdisplayed.
 If the reserve value display setting is enabled, the reserve value will appear after the gas

concentration.
 To cancel span adjustment, press the DISP/ESC button in Step 4.

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8. Maintenance

8-3 Performing bump tests

8-3 Performing bump tests
The product includes a function for performing bump tests.
Bump tests can be performed for gas types selected from cylinders A to F.
Prepare the bump test gas in the same way as for gas adjustment, and connect it to the main unit. (Refer to‘8-2-1 Preparation for gas adjustment’.)
Bump tests are performed using [BUMP TEST] in user mode.

NOTE With the power turned off, press the POWER/ENTER button and ▲/AIR button simultaneously toswitch to user mode. (Refer to ‘7-2 Switching to user mode’.) To exit [BUMP TEST], press the ▲/AIR or RESET/▼ button several times to select [ESCAPE], thenpress the POWER/ENTER button. The display returns to the user mode menu.
 It is possible to enter measurement mode from [BUMP TEST]. Press the ▲/AIR or RESET/▼ button

several times in [BUMP TEST] to select [START MEASURE], then press the POWER/ENTER button.
User mode ends, and the product enters measurement mode after performing the same operation as
when the power is turned on.
 Use the specified calibration gas for each sensor to perform bump tests.
For VOC sensors, this will be isobutylene (C4H8), a volatile organic compound (VOC).
 When the automatic start after successful bump test function is enabled and the cylinder setting is A
only, measurement will start automatically after a successful bump test.
The automatic start after successful bump test function can be modified using the setup program soldseparately.
 The default settings for conditions for executing a bump test are as follows:・ Test time: 30 seconds
・ Tolerance (%): 50 %・ Adjustment time: 90 seconds
・ Bump adjustment: ON
 The following conditions for executing a bump test can be modified using the setup program soldseparately.
・ Tolerance (%): Threshold for checking the calibration gas
・ Gases other than oxygen (O2): Adjustment concentration ± (adjustment concentration  tolerance (%))
・ Oxygen (O2): Adjustment concentration ± (difference between adjustment concentration and20.9 %  tolerance (%))
・ Adjustment time after test failure: Adjustment time - test time1

Press the ▲/AIR or RESET/▼ button in the user mode menu
to select [BUMP TEST], then press the POWER/ENTER
button.

2

Press the ▲/AIR or RESET/▼ button to select the cylinder tobe adjusted, then press the POWER/ENTER button.
Pressing the button cycles through the settings in the following
sequence: [CYLINDER A] → [CYLINDER B] → … [CYLINDER F].
Note that cylinders not set will not be displayed.

3

Introduce the bump test gas, then press the POWER/ENTER
button.
The bump test is performed.
The bump test remaining time is displayed at the bottomof the screen.
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8. Maintenance

8-3 Performing bump tests

If the bump adjustment function isenabled, the product will automatically
perform gas adjustment in the eventof a bump test failure.
The gas adjustment remaining time isdisplayed at the bottom of the screen.
The following results are displayed when the bump test
and gas adjustment have ended.
Press the ▲/AIR or RESET/▼ button to toggle theresults display.
・ Bump test and gas adjustment results
The bump test results are displayed on the left side of
the concentration display area, and the gas adjustment
results are displayed on the right side.
[P]: Passed, [F]: Failed

・ Bump test gas concentration(Display example)

・ Gas adjustment gas concentration (when gas
adjustment was performed)

4

Press the POWER/ENTER button.
[END] appears, and the display returns to the screen in
Step 2.

(Display example)

NOTE
 If the setting to perform gas adjustment after a bump test failed is disabled (the default setting isenabled), the bump test result is displayed when the bump test ends. In this case, only the bump test
result and bump test gas concentration are displayed.
 To cancel a bump test, press the DISP/ESC button in Step 3.
 If a bump test fails, perform gas adjustment. If gas adjustment also fails, refer to ‘10 Troubleshooting’.

WARNING Return to measurement mode manually once the bump test is complete. The product will not
automatically return to measurement mode from user mode.

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8. Maintenance

8-4 Performing alarm tests

8-4 Performing alarm tests
Press the POWER/ENTER button while an alarm setpoint is displayed in the display mode alarm setpoint
display to test the corresponding alarm.

1

Press the DISP/ESC button several times on themeasurement mode screen to display the ALARM
POINTS screen.

2

Press the POWER/ENTER button.

3

Press the ▲/AIR button several times to display thealarm setpoint for the alarm test.
Pressing the ▲/AIR button cycles through the alarm
setpoints displayed.
The display changes in the following sequence:[FULL SCALE] → [WARNING] → [ALARM] → [STEL] →[TWA] → [FULL SCALE] → ・・・

4

Press the POWER/ENTER button.
This activates the selected alarm setpoint alarm.
Press the RESET/▼ button to reset the alarm.

NOTE Perform alarm tests at regular intervals.

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8. Maintenance

8-5 Cleaning procedure

8-5 Cleaning procedure
Clean the product if it becomes excessively dirty. Be sure to turn off the power before cleaning, and wipe
clean using a rag or cloth soaked in water and firmly wrung out.
Do not clean using water, organic solvents or commercially available cleaners for cleaning, as these may
cause the product to malfunction.

CAUTION When wiping the product clean, do not splash water on it or use organic solvents like alcohol andbenzine or commercially available cleaners. These may discolor or damage the surface of the product,
or cause the sensor to malfunction.

NOTE
 Water may remain in the buzzer sound opening or grooves after the product has got wet.

Remove any moisture as follows:① Wipe off any moisture on the product using a dry towel or cloth.
② Hold the product firmly and shake about 10 times with the buzzer sound opening facing downward.
③ Use a towel or cloth to wipe up all moisture drained from the interior.
④ Place the product on a dry towel or cloth and allow to stand at room temperature.

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8. Maintenance

8-6 Parts replacement

8-6 Parts replacement
8-6-1 Periodic replacement parts
The consumable parts of the product are listed below. Consumable parts should be replaced using therecommended replacement intervals as a guide.

NOTE The recommended replacement intervals are guidelines only. Replacement intervals may varydepending on actual operating conditions. These intervals do not constitute warranty periods.
Replacement intervals may vary depending on the results of regular maintenance.

<Recommended replacement parts list>
Recommended
maintenanceinterval

Recommended
replacement
interval

Quantity(per unit)

Remarks

3 months

6 months

×1

Used when carbon monoxide
sensor (ESR-A13P) is installed
Internal filter
Part No.: 4777 9213 10

3 months

6 months

×1

Used when hydrogen sulfide
sensor (ESR- A13i) is installed
Internal filter
Part No.: 4777 9214 80

6 months

1 year×1

Used when VOC sensor isinstalled
External filter
Part No.: 4383 9299 50

6 months

1 year×1

Used when carbon dioxide
sensor is installed
External filter
Part No.: 4383 0390 80

Dust filter(For gas sampling rod, set of 10)

6 months

6 months to
1 year

×1

Internal filter
Part No.: 4181 5452 30

Dust filter(For absorbent cotton filter
CF-8385, set of 10)

6 months

6 months to
1 year

×1

Internal filter
Part No.: 4775 5381 60

Absorbent cotton(For absorbent cotton filter
CF-8385, 25 g)

6 months

6 months to
1 year

1.3 g

Internal filter
Part No.: 1879 0011 10

6 months

6 months to
1 year

×1

Internal filter
Part No.: 4777 4495 90

Name
Interference gas removal filter*

Interference gas removal filter*

Activated carbon filter
CF-8350

CO2 removal filter
CF-284

Dust filter (internal filter)*Tubes (internal pipes)*-

3 to 8 years

1 set

Rubber seals*-

3 to 6 years

1 set

6 months

1 to 2 years

×1
or ×2

GX-9000: ×1
GX-9000H: ×2-

500 charge/
discharge
cycles×1

When using lithium ion battery
unit (BUL-9000)
Part No.: 2931 0884 50

Pump unit (RP-11)*
Lithium ion battery unit
(BUL-9000)

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8. Maintenance

8-6 Parts replacement

Name

Recommended
maintenanceinterval

Recommended
replacement
interval

Quantity(per unit)

Remarks--

×6

When using alkaline dry battery
unit (BUD-9000)
Part No.: 2753 3007 80

AA alkaline batteries* A function check by a qualified service engineer is required after parts replacement. To ensure safety and the stable operation of
the product, request checking by a qualified service engineer. Contact RIKEN KEIKI.

<Sensor replacement intervals>
Sensor model

Detection target gas

Display range

Recommended
sensorreplacement
interval

NCF-6322P

Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)
Acetylene (C2H2)

0 – 100 %LEL

3 years

TEF-7520P

Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)

0 – 100.0 vol%3 years

5 years

IRF-4341

Methane (CH4)

IRF-4345

Isobutane (HC (i-C4H10))

0 – 100.0 %LEL/
100.0 %LEL – 100.0 vol%IRF-4443

Carbon dioxide (CO2)

0 – 20.00 vol%ESR-X13P

Oxygen (O2)

0 – 40.0 %3 years

ESR-A13i

Hydrogen sulfide (H2S)
low concentration0 – 200.0 ppm

3 years

ESR-A13P

Carbon monoxide (CO)0 – 2,000 ppm

3 years

ESF-A24R2

Hydrogen sulfide (H2S)
high concentration0 – 1,000 ppm

3 years

ESF-B242

Ammonia (NH3)

0 – 75.0 ppm

2 years

ESF-C930

Chlorine (Cl2)

0 – 1.50 ppm

3 years

ESF-B249

Ozone (O3)0 – 0.600 ppm

1 yearESF-A24E2

Hydrogen chloride (HCl)

0 – 6.00 ppm

3 years

ESF-A24D4

Sulfur dioxide (SO2)

0 – 100.0 ppm

3 years

ESF-A24D(Japan Ex model)

Hydrogen cyanide (HCN)

0 – 15.0 ppm

3 years

PIF-001

Volatile organic compounds (VOCs)

0 – 40,000 ppb

5 years*

PIF-002

Volatile organic compounds (VOCs)

0 – 4,000 ppm

5 years*

PIF-003

Volatile organic compounds (VOCs)

0 – 100.0 ppm

5 years** Excluding consumable parts (LEDs, pellets). The recommended replacement interval for LEDs and pellets is one year.
Depending on the usage frequency and environment, replacement may be required after several months.

NOTE
 A function check by a qualified service engineer is required after sensor replacement. To ensure

safety and the stable operation of the product, request checking by a qualified service engineer.
Contact RIKEN KEIKI.
 Depending on the target gas, the gas sensitivity of VOC sensors may be reduced if the sensor interior
becomes dirty. In such cases, the pellet must be replaced and the LED cleaned. (Refer to ‘8-6-3 VOC
sensor maintenance’.)If gas sensitivity is not restored even after cleaning, replace both the LED and the pellet.

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8. Maintenance

8-6 Parts replacement

8-6-2 Gas sampling rod dust filter replacement
The gas sampling rod probe contains a dust filter. The dust filter may become dirty and clogged with use.
Replace periodically based on operating conditions.
Be sure to replace the filter, particularly if water is aspirated, the flow rate drops, or the filter appears
especially dirty.
1Rotate the gas sampling rod probe to remove it.

Probe

2

Remove the dust filter, and replace with a new one.

3

Rotate the probe to attach it.

Dust filter

NOTE
 Do not use filters other than those specified by RIKEN KEIKI.
 The gas sampling rod dust filter differs from the filter cylinder dust filter. Use the respective specified

filters.
 For more information on the replacement filters, refer to ‘8-6-1 Periodic replacement parts’.

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8. Maintenance

8-6 Parts replacement

8-6-3 VOC sensor maintenance
Depending on the target gas, the gas sensitivity of VOC sensors may be reduced if the sensor interior
becomes dirty. In such cases, the pellet must be replaced and the LED cleaned.

NOTE If gas sensitivity is not restored even after cleaning, replace both the LED and the pellet.
 Be sure to perform gas adjustment after cleaning.

<Removing the VOC sensor>
1

Unscrew the four screws that secure the cover on
the top of the main unit.

2

Remove the cover and take out the VOC sensor.
Grasp the cylindrical part of the sensor and gently pullout.

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8. Maintenance

8-6 Parts replacement<Removing the pellet and LED>
Use the pellet removal tool to remove the pellet and LED from the VOC sensor main unit.
1

Place the VOC sensor main unit on a clean surface,with the bottom facing down.

2

Fit the pellet removal tool in the side slots of the VOC sensor.
Pellet removal tool
PelletSide slot
VOC sensor mainunit

Push these parts into the side
slots of the VOC sensor.

3

Press the pellet removal tool on both sides to lift thepellet and LED from the VOC sensor main unit.
Pushing the pellet removal tool into the side slots on the
VOC sensor main unit will lift the pellet to allow removal.
Press down lightly with your hand when removing toprevent the pellet from flying out.
If the LED remains inside the VOC sensor main unit,
use tweezers or other instrument to remove it.

4

Place the pellet and LED on a clean surface.
Separate the pellet removal tool from the VOC
sensor.

LED
PelletNOTE
 The small spring at the base of the LED may come off as the pellet and LED are removed from the

VOC sensor main unit. If this occurs, return the LED to the VOC sensor main unit, then use tweezers
or other instrument to remove the LED once again.

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8. Maintenance

8-6 Parts replacement<Cleaning the LED>
CAUTION Use clean cotton swabs to clean the LED. Avoid touching the tip of the cotton swab used to clean the
LED with your fingers. Oil from your fingers may soil the LED if you touch the tip of the cotton swab.

1

Place a small amount of alumina polishing powder
on a clean cotton swab.

2

Clean the LED window with the cotton swab until
you hear a squeaking sound (within about 15
seconds).
Clean the LED window in a circular motion, applying
gentle pressure.
Avoid touching the LED window with your fingers while
doing this.

Cottonswab

LED window

3

Use a clean cotton swab to remove any remaining
alumina polishing powder from the LED window.

4

Confirm that the LED is completely dry and that novisible soiling remains.

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8. Maintenance

8-6 Parts replacement<Mounting the pellet and LED>
Attach the LED to a new pellet and insert into the VOC sensor main unit.

CAUTION Never reattach a damaged LED to a pellet.

1

Place a new pellet on a clean, flat surface.

O-ring seal

Electrode2

Insert the LED into the O-ring seal of the new pellet.
When inserting the LED into the pellet, twist slightly. The
LED window will fit into the electrode on the pellet.

3

Twist the LED into the O-ring seal so that it isclosely attached to the electrode plane of the pellet.
Check to confirm that the LED window is closely
attached to the electrode plane of the pellet.

4

Place the pellet into which the LED has been fitted
on a flat surface. Place the VOC sensor main unit
over it and press so that the pellet fits into the VOC
sensor main unit.
Press in firmly until you hear a click.

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8. Maintenance

8-6 Parts replacement<Installing the VOC sensor>
Install the VOC sensor in the main unit and perform gas adjustment.
1

Remove the cover from the top of the main unit andattach the VOC sensor.
Grasp the cylindrical part of the sensor to fit to the main
unit.

2

Use the four screws to secure the cover on the topof the main unit.

3

Perform gas adjustment.

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9. Storage and Disposal

9-1 Procedures for storage or when not in use for extended periods

9

Storage and Disposal
9-1 Procedures for storage or when not in use for extended periods
The product must be stored in the following environment: In a dark place at normal temperatures and humidity and away from direct sunlight In a location free of gases, solvents, and vapor
Store the product in its shipping carton if this has been retained.
If the shipping carton is not available, store away from dust and dirt.

CAUTION
 Store the product with the lithium ion battery unit or dry battery unit attached.
The product constantly draws power for the sensors and clock even when the power is turned off. The
sensors may be damaged or the clock display may become offset if there is no power supply.
 When using the dry battery unit, store the product with the dry batteries left inside. The productconstantly requires power for the sensors even when the power is turned off.
 Even if you do not intend to use the product for extended periods, turn the power on at least once
every six months to check pump suction for approximately three minutes. Grease inside the pump
motor may solidify and prevent operation unless the product is operated.

NOTE If the lithium ion battery is stored on its own, we recommend storing after it has been discharged until

the battery level icon shows one bar. Storing while fully charged may reduce battery life andaccelerate battery deterioration.
 If the dry battery unit is stored on its own, remove the batteries before storing.

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9. Storage and Disposal

9-2 Procedures for use after storage

9-2 Procedures for use after storage
Perform gas adjustment if the product is used again after an extended period in storage.

CAUTION After storage without use, be sure to perform gas adjustment before resuming use. Contact RIKEN
KEIKI to request readjustment of the product, including gas adjustment.
 If there is a temperature difference of 15 °C or more between the storage and usage locations, turn on
the power and allow the product to stand for about 10 minutes in a similar environment to the usage
location to acclimatize before performing fresh air adjustment in clean air.

9-3 Product disposal
Dispose of the product as industrial waste (incombustible) in accordance with local regulations.

WARNING Never disassemble the sensor. Electrochemical type sensors in particular contain hazardous
electrolyte. Contact with electrolyte may result in skin inflammation. Contact with eyes may result inblindness. Contact with clothing may result in discoloration or damage to the fabric.
If contact occurs, rinse the area immediately with plenty of water.
 Dispose of batteries in accordance with the procedures specified by the local authority.

<Disposal in EU member states>
When disposing of the product in an EU member state, dispose of the battery separately.
The battery removed from the lithium ion battery unit or dry batteries used in the dry battery unit must be
handled in accordance with waste sorting and collection or recycling systems stipulated by the regulations ofEU member states.

NOTE Crossed-out recycle dustbin mark
 This pictogram is affixed to products containing batteries to which EU Battery

Directive 2006/66/EC applies. It indicates that batteries must be disposed ofappropriately.
 Be sure to dispose of the batteries separately from regular waste.

149/20410. Troubleshooting

10-1 Product abnormalities

10

TroubleshootingThis troubleshooting section does not address causes of all problems that may occur with the product. It
provides brief explanations to assist in determining the causes of common problems.
If you encounter symptoms not addressed here or if problems persist even after taking corrective action,
contact RIKEN KEIKI.

10-1 Product abnormalities<Power source related problems>
Symptom/display

Cause

Action・ The battery is depleted.

Lithium ion battery unit:
Charge in a safe place.
Dry battery unit:
Replace with new dry batteries (all six) ina safe place.

・ The POWER/ENTER button waspressed for too short a time.

Hold down the POWER/ENTER button
until the buzzer blips once.

・ The battery unit is incorrectly
attached.

Check to confirm that the battery unit iscorrectly attached to the main unit.

Abnormal operation

・ Effects of sudden static electricity
noise, etc.

Turn off the power, then turn it back onagain to restart.

The product does notoperate.

・ Effects of sudden static electricity
noise, etc.

Remove the battery unit in a safe place,reattach the battery unit, then turn on the
power again.

The product cannot berecharged.
(When using lithium ion
battery unit)

・ The adapter is not correctly
connected.

Insert the AC plug and connection
terminal of the AC adapter correctly.

・ There is a fault in the charging circuit.

Contact RIKEN KEIKI.

The power cannot be
turned on.

150/20410. Troubleshooting

10-1 Product abnormalities<Flow rate abnormality (FAIL FLOW)>
Cause

Action・ The flow passage is blocked.

Fix the problem (e.g., broken pipe, water aspiration), then press the
RESET/▼ button to restart the pump.

・ The pump is deteriorated.

The pump must be replaced.
Contact RIKEN KEIKI.

・ The power was turned on in cold
temperatures or after extended
periods without use

Turn the power off and on several times. The pump may startworking.

・ Left for extended periods under cold
conditions

The pump valve has frozen, reducing the suction flow rate. Press the
RESET/▼ button to restart the pump.
The product may need to be restarted several times to restore
functionality.

<Low battery voltage abnormality (FAIL BATTERY)>
Cause

ActionLithium ion battery unit: Charge in a safe place.
Dry battery unit: Replace with new dry batteries (all six) in a safe
place.

・ The battery level is low.

<System abnormality (FAIL SYSTEM)>
Fault No.

Cause

Action000

・ Internal ROM abnormality
・ Effects of abnormal noise

Contact RIKEN KEIKI.

010

・ Internal RAM abnormality
・ Effects of abnormal noise

Contact RIKEN KEIKI.

021

・ Internal FRAM abnormality
・ Effects of abnormal noise

Contact RIKEN KEIKI.

031

・ Internal flash abnormality
・ Data logger writing failed
・ Effects of abnormal noise

Gas concentration measurement is possible in thisstate, but the data logger function cannot be used.
If this symptom occurs frequently, the flash memory
must be replaced.
Contact RIKEN KEIKI.

080

・ Main PCB reference voltage abnormality
or pressure sensor power supply voltage
abnormality
・ Effects of abnormal noise

Turn off the power, then turn it back on again torestart. If the problem persists, contact RIKEN
KEIKI.

081

・ Sensor PCB communication abnormality,
status abnormality, or reference voltage
abnormality
・ Effects of abnormal noise

Turn off the power, then turn it back on again torestart. If the problem persists, contact RIKEN
KEIKI.

082

・ Internal thermistor abnormality
・ The ambient conditions are too far
outside the operating temperature range.

Contact RIKEN KEIKI.

083

・ Bluetooth fault
・ Effects of abnormal noise

Gas measurement is possible in this state, but theBluetooth function cannot be used.
The Bluetooth function must be repaired if it is to
be used. Contact RIKEN KEIKI.

151/20410. Troubleshooting

10-1 Product abnormalities<Clock abnormality (FAIL CLOCK)>
Fault No.

050

051

Cause

Action・ Internal clock abnormality
・ Effects of abnormal noise

Set the date and time.
If this symptom occurs frequently, the internal clock
must be replaced.
Contact RIKEN KEIKI.

・ Low backup battery voltage

Lithium ion battery unit:
Charge in a safe place, then set the date and time.
Dry battery unit:
Replace with new dry batteries (all six) in a safe
place, then set the date and time.
If the problem persists, the backup battery must be
replaced. Contact RIKEN KEIKI.

<Sensor abnormality (FAIL SENSOR)>
Symptom

Span adjustment is notpossible.

Fresh air adjustment is
not possible.

Performing a bump test
is not possible.

Base gas adjustment is
not possible.

Cause

Action・ The sensor is not correctly installed.
・ The sensor is faulty.

Check to confirm that the sensor iscorrectly installed.
If the sensor is faulty, it must be replaced.
Contact RIKEN KEIKI.

・ The calibration gas concentration
setting differs from the concentrationof the calibration gas supplied.

Check to confirm that the calibration gas
concentration setting is the same as theconcentration of the calibration gas
supplied.

・ The sensor is not correctly installed.
・ The sensor is faulty.

Check to confirm that the sensor iscorrectly installed.
If the sensor is faulty, it must be replaced.
Contact RIKEN KEIKI.

・ Clean air is not being suppliedaround the product.

Provide clean air.

・ Calibration gas is not being supplied
during a bump test.

Supply the correct calibration gas for thebump test.

・ The calibration gas concentration
setting differs from the concentrationof the calibration gas supplied.

Check to confirm that the calibration gas
concentration setting is the same as theconcentration of the calibration gas
supplied.

・ Gas adjustment has not been
performed.

Perform fresh air adjustment and span
adjustment.

・ The sensor is not correctly installed.
・ The sensor is faulty.

Check to confirm that the sensor iscorrectly installed.
If the sensor is faulty, it must be replaced.
Contact RIKEN KEIKI.

・ Base gas (nitrogen (N2) or inert gas)
is not being supplied.

Supply the specified base gas.

152/20410. Troubleshooting

Symptom

CO2 zero adjustment is
not possible.

10-1 Product abnormalities

Cause

Action・ The sensor is not correctly installed.
・ The sensor is faulty.

Check to confirm that the sensor iscorrectly installed.
If the sensor is faulty, it must be replaced.
Contact RIKEN KEIKI.

・ Calibration gas (nitrogen (N2)) is not
Supply the calibration gas (nitrogen (N2)).
being supplied.

A sensor abnormality is
indicated.

・ The sensor is not correctly installed.

Check to confirm that the sensor iscorrectly installed.

・ The sensor is faulty.

If the sensor is faulty, it must be replaced.
Contact RIKEN KEIKI.

・ There are problems with
communicating with the sensor.

Replace with a new sensor.

・ An unsupported F sensor is installedin the product.

Replace with an F sensor supported by
the product.

・ The F sensor is installed in thewrong position (order of priority).

Check the F sensor installation order.

<Other>Symptom

Cause

Action[PLEASE CAL] isdisplayed.

This indicates that more than one year
has elapsed since the last adjustment
date. (Japan Ex model only)

Contact RIKEN KEIKI to request
maintenance.

[CAL DATE PAST] isdisplayed.

Notification that the set gas adjustment
expiration date has passed(ATEX/IECEx model only)

Either perform gas adjustment yourself orcontact RIKEN KEIKI to request
maintenance.

[BUMP DATE PAST] isdisplayed.

Notification that the set bump
expiration date has passed

Perform a bump test.

153/20410. Troubleshooting

10-2 Reading abnormalities

10-2 Reading abnormalities
Symptom

The reading rises (ordrops) and remains
unchanged.

Slow response

Gas adjustment is notpossible.

Cause

ActionSensor drift

Perform fresh air adjustment.

Presence of interference gases

It is difficult to completely eliminate theeffects of interference gases such as
solvents.
Contact RIKEN KEIKI for information on
countermeasures, such as removal filters.

Slow leakage

They may be a very small leakage (slowleakage) of the detection target gas.
Leaving this unresolved may lead tohazardous conditions. Take the sameaction as for gas alarms.

Ambient condition fluctuations such astemperature and humidity.

Perform fresh air adjustment.

Sensor condensation

Perform fresh air adjustment.
Particularly in the case of oxygen
sensors, fresh air adjustment is requiredas the reading may decrease due tocondensation.

Dust filter clogging

Replace the dust filter.

Gas sampling tube is bent or blocked.

Fix the problem.

There is condensation inside theproduct.

Fix the problem.

The sensor sensitivity has degraded.

Replace with a new sensor.
Contact RIKEN KEIKI.

The calibration gas concentration isinappropriate.

Prepare the correct calibration gas.

The sensor sensitivity has degraded.

Replace with a new sensor.
Contact RIKEN KEIKI.

154/20411. Product Specifications

11-1 Product specifications

11

Product Specifications
11-1 Product specifications
11-1-1 GX-9000 specifications
Item

Specifications

Concentration display

LCD digital (full dot)

Detection target gas

Combustible gas (methane (CH4), isobutane (HC (i-C4H10)), hydrogen (H2), acetylene(C2H2)), oxygen (O2), toxic gas (low-concentration hydrogen sulfide (H2S)), carbon
monoxide (CO), ammonia (NH3), chlorine (Cl2), ozone (O3), hydrogen chloride (HCl), sulfur
dioxide (SO2), hydrogen cyanide (HCN)*1, volatile organic compounds (VOC), carbon
dioxide (CO2)

Detection method

Pump suction type

Suction flow rate

Minimum 0.75 L/min (open flow rate)

Display items

Clock, battery level, operation status

Display languages

Japanese, English, Korean, Chinese (simplified), Chinese (traditional), Vietnamese, Italian,
Spanish, Slovak, Czech, German, Turkish, French, Portuguese, Polish, Russian

Buzzer volume

Approx. 95 dB (mean value at 30 cm from source)

Gas alarm indication

Lamp flashing, continuous modulating buzzer sounding, gas concentration reading
blinking

Gas alarm pattern

Self-latching, auto-reset

Fault alarm/self-diagnosis

Flow rate abnormality, system abnormality, sensor abnormality, low battery voltage,
adjustment failure, clock abnormality

Fault alarm indication

Lamp flashing, intermittent buzzer sounding, detail display

Fault alarm pattern

Self-latching

Communication
specifications

USB 2.0 Type-C (for data logger and setup), Bluetooth 4.2 (Bluetooth Low Energy)

Power source

Dedicated lithium ion battery unit (BUL-9000) or
dedicated dry battery unit (AA alkaline batteries  6) (BUD-9000)*2

Continuous operatingtime

Lithium ion battery unit: approx. 25 hours
Dry battery unit: approx. 12 hours
At 25 °C, no alarm, no lighting
The continuous operating time varies depending on the sensor installed.

Operating temperature
range

Approx. 15-minute temporary use environment: -40 °C to +60 °C (no sudden changes)
Continuous use environment: -20 °C to +50 °C (no sudden changes)
May vary depending on the sensors installed. (Refer to ‘11-2 Sensor specifications’.)

Operating humidity
range

Approx. 15-minute temporary use environment: 0 to +95 %RH (no condensation)
Continuous use environment: 10 to +90 %RH (no condensation)
May vary depending on the sensors installed. (Refer to ‘11-2 Sensor specifications’.)

Operating pressure
range

80 kPa to 120 kPa (80 kPa to 110 kPa for explosion-proof range)

Construction

Dustproof, waterproof construction equivalent to IP66/68*3, drop resistant to 1.5 m

155/20411. Product Specifications

11-1 Product specifications

Item

Specifications

Explosion-proof
construction

Japan Ex (explosion-proof electrical equipment type certified) models:
Intrinsically safe explosion-proof construction, flame-proof enclosure (with new ceramic
type sensor installed)
Intrinsically safe explosion-proof construction (without new ceramic type sensor
installed)
ATEX/IECEx models:
Intrinsically safe explosion-proof construction, flame-proof enclosure (with new ceramic
type sensor installed)
Intrinsically safe explosion-proof construction (without new ceramic type sensor
installed)

Explosion-proof class

Japan Ex (explosion-proof electrical equipment type certified) models:
Ex da ia IIC T4 Ga (with new ceramic type sensor installed)
Ex ia IIC T4 Ga (without new ceramic type sensor installed)
ATEX models*4:
II 1 G Ex da ia IIC T4 Ga (with new ceramic type sensor installed)
II 1 G Ex ia IIC T4 Ga (without new ceramic type sensor installed)
IECEx models*4:
Ex da ia IIC T4 Ga (with new ceramic type sensor installed)
Ex ia IIC T4 Ga (without new ceramic type sensor installed)

Certifications

JIS T 8201:2010 (Oxygen deficiency indicator)
JIS T 8205:2018 (Hydrogen sulfide indicator/alarm)

External dimensions

Approximately 158 (W)  85 (H)  132 (D) mm

WeightApprox. 1.1 kg*1: ATEX/IECEx models are not available. Cannot be installed for export outside Japan due to export restrictions.
*2: Japan Ex models can use six LR6 batteries manufactured by Toshiba.
ATEX/IECEx models can use either six LR6 batteries manufactured by Toshiba or six MN1500 batteries manufactured byDuracell.
*3: IPx8 rating indicates no water ingress when submerged for one hour at water depth of 2 m.
*4: Dry battery models when using Duracell (MN1500) batteries: -40 °C to +40 °C: T4, -40 °C to +60 °C: T3

156/20411. Product Specifications

11-1 Product specifications

11-1-2 GX-9000H specifications
Item

Specifications

Concentration display

LCD digital (full dot)

Detection target gas

Combustible gas (methane (CH4), isobutane (HC (i-C4H10))), oxygen (O2), hydrogen sulfide(H2S) low-concentration/high-concentration, carbon monoxide (CO)

Detection method

Pump suction type

Suction flow rate

Minimum 0.75 L/min (open flow rate)

Display items

Clock, battery level, operation status

Display languages

Japanese, English, Korean, Chinese (simplified), Chinese (traditional), Vietnamese, Italian,
Spanish, Slovak, Czech, German, Turkish, French, Portuguese, Polish, Russian

Buzzer volume

Approx. 95 dB (mean value at 30 cm from source)

Gas alarm indication

Lamp flashing, continuous modulating buzzer sounding, gas concentration reading
blinking

Gas alarm pattern

Self-latching, auto-reset

Fault alarm/self-diagnosis

Flow rate abnormality, system abnormality, sensor abnormality, low battery voltage,
adjustment failure, clock abnormality

Fault alarm indication

Lamp flashing, intermittent buzzer sounding, detail display

Fault alarm pattern

Self-latching

Communication
specifications

USB 2.0 Type-C (for data logger and setup), Bluetooth 4.2 (Bluetooth Low Energy)

Power source

Dedicated lithium ion battery unit (BUL-9000) or
dedicated dry battery unit (AA alkaline batteries  6) (BUD-9000)*1

Continuous operatingtime

Lithium ion battery unit: approx. 35 hours
Dry battery unit: approx. 15 hours
At 25 °C, no alarm, no lighting

Operating temperature
range

Approx. 15-minute temporary use environment: -40 °C to +60 °C (no sudden changes)
Continuous use environment: -20 °C to +50 °C (no sudden changes)

Operating humidity
range

Approx. 15-minute temporary use environment: 0 to +95 %RH (no condensation)
Continuous use environment: 10 to +90 %RH (no condensation)

Operating pressure
range

80 kPa to 120 kPa (80 kPa to 110 kPa for explosion-proof range)

Construction

Dustproof, waterproof construction equivalent to IP66/68 (excluding pipes)*2, drop
resistant to 1.5 m

Explosion-proof
construction

Japan Ex (explosion-proof electrical equipment type certified) models:
Intrinsically safe explosion-proof construction
ATEX/IECEx models:
Intrinsically safe explosion-proof construction

Explosion-proof class

Japan Ex (explosion-proof electrical equipment type certified) models:
Ex ia IIC T4 Ga
ATEX models*3:
II 1 G Ex ia IIC T4 Ga
IECEx models*3:
Ex ia IIC T4 Ga

Certifications

JIS T 8201:2010 (Oxygen deficiency indicator)
JIS T 8205:2018 (Hydrogen sulfide indicator/alarm)

External dimensions

Approximately 158 (W)  85 (H)  132 (D) mm

WeightApprox. 1.2 kg*1: Japan Ex models can use six LR6 batteries manufactured by Toshiba.
ATEX/IECEx models can use either six LR6 batteries manufactured by Toshiba or six MN1500 batteries manufactured byDuracell.
*2: IPx8 rating indicates no water ingress when submerged for one hour at water depth of 2 m.
*3: Dry battery models when using Duracell (MN1500) batteries: -40 °C to +40 °C: T4, -40 °C to +60 °C: T3

157/20411. Product Specifications

11-2 Sensor specifications

11-2 Sensor specifications
11-2-1 Combustible gas sensors
CAUTION Do not install sensors for different gas types when using a combustible gas sensor.
A new ceramic type sensor and a thermal conductivity type sensor can be used in combination to
detect the same gas type.
Quality cannot be guaranteed if sensors for different gas types are used.

<New ceramic type>
Item

Detection targetgas

Methane
CH4
Japan Ex and
ATEX/IECEx
0 – 100 %LEL
0 – 100 %LEL
1 %LEL
10 %LEL
50 %LEL
100 %LEL

Isobutane
Hydrogen
HC (i-C4H10)
H2
NCF-6322P
Japan Ex andJapan Ex and
ATEX/IECEx
ATEX/IECEx
0 – 100 %LEL
0 – 100 %LEL
0 – 100 %LEL
0 – 100 %LEL
1 %LEL
1 %LEL
10 %LEL
10 %LEL
50 %LEL
50 %LEL
100 %LEL
100 %LEL

Japan Ex and
ATEX/IECEx
0 – 100 %LEL
0 – 100 %LEL
1 %LEL
10 %LEL
50 %LEL
100 %LEL-20 °C to +50 °C-20 °C to +50 °C-20 °C to +50 °C-20 °C to +50 °C-40 °C to +60 °C-40 °C to +60 °C-40 °C to +60 °C-40 °C to +60 °C

10 to 90 %RH

10 to 90 %RH

10 to 90 %RH

10 to 90 %RH

95 %RH or less

95 %RH or less

95 %RH or less

95 %RH or lessSensor model
Explosion-proof specifications
Display range
Detection range
Resolution
First alarm
Second alarm
Alarm
TWA
setpoints
STEL
OVER
Continuous use
environment
Operatingtemperature Temporary use
range
environment(approx. 15 minutes)
Continuous use
environment
Operatinghumidity
Temporary use
range
environment(approx. 15 minutes)
Indication accuracy(for identical conditions)
Response time (T90)

Acetylene
C2H2Within ±5 %LEL

Within ±5 %LEL

Within ±5 %LEL

Within ±5 %LEL

Within 30 seconds

Within 30 seconds

Within 30 seconds

Within 30 seconds

CAUTION The detection target gas is specified at the time of purchase.
 Sensor characteristics may degrade significantly in the presence of silicone gases (organic siliconbased gases), halogen gases, sulfide gases, or acidic gases.
 Allow the product to warm up for at least 10 minutes in air before performing fresh air adjustment orspan adjustment.
 If the sensors have been in contact with nitrogen (N2) or high-concentration gas, exhaust for at least
five minutes before performing gas adjustment.
 If no oxygen sensor is installed and the product comes into contact with high-concentration gas of
100 %LEL or more, an OVER alarm will occur and remain until it is reset. (Refer to ‘4-3 Gas alarm
patterns’.)

158/20411. Product Specifications

11-2 Sensor specifications

 Readings will be given even for combustible gases other than the detection target gas.
 In user mode, contact with high-concentration gas of 100 %LEL or more will damage the sensor.
 If the oxygen concentration drops below 10 %, the combustible gas concentration reading for NCF
sensors will appear as [----], and if the NCF/TEF sensor range setting is set to [AUTO RANGE] (default
setting), the display changes to the TEF sensor reading. If [LEL ONLY] is set, measurement will not be
performed. Reassess the usage environment. (Refer to ‘6-4-1 Setting the NCF/TEF sensor range’.) If the oxygen sensor (ESR-X13P) is not installed or if the combustible gas concentration is displayed
only in the %LEL range, the OVER alarm will remain fixed if the measured combustible gas
concentration exceeds 100 %LEL.
To reset the alarm, press the RESET/▼ button in the presence of clean air. The concentration display
resumes a short while after pressing the RESET/▼ button.
 When oxygen concentrations fall, the readings may also fall.
 It cannot be used at oxygen concentrations of 10 % or lower. The gas concentration display will appear
as [----].
 With high oxygen concentrations, contact with high-concentration gas of 100 %LEL or more may
damage the sensor. Perform fresh air adjustment and span adjustment if the zero point has fluctuated.
 For measurements performed in locations where high-concentration combustible gases are known tobe present, select [VOL ONLY] for the NCF/TEF sensor range setting. (Refer to ‘6-4-1 Setting the
NCF/TEF sensor range’.) Some interference may occur in environments where highly thermally conductive gases such ascarbon dioxide (CO2), argon (Ar), and helium (He) are present in high concentrations as base gases.
 When low vapor pressure gases are measured by aspiration, the gas may condense when aspirated
from a warmer area and measured in a cooler area, or blockage may occur in sintered alloy. Keepvapor pressure in mind when using the product.
 Indication accuracy may degrade in situations in which temperatures fluctuate significantly (±40 °C or
greater) above or below the ambient temperature in which fresh air adjustment and span adjustment
was performed. If this occurs, readjust.
 Readings may fluctuate if the product is subject to strong external impact or vibration. If this occurs,
perform fresh air adjustment and span adjustment.
 The sensor may be hot during replacement. Be careful to avoid burns when replacing the sensor. If thesensor is hot, turn off the power and wait for it to cool.
 There is a Teflon film on the top of the sensors. There may be an impact on flow characteristics due tomain unit pump suction if this Teflon film is damaged. Avoid applying excessive pressure or sharp
objects to the Teflon film.
 If the conditions change suddenly from room temperature to hot and humid conditions, the reading
may be lower than it should be due to condensation.

NOTE
 The alarm setpoints indicated in the table above can be altered. However, the setpoint cannot bechanged for those shown as “-”. (Refer to ‘7-3-1 Setting alarm setpoints’.)159/20411. Product Specifications

11-2 Sensor specifications<Thermal conductivity type>
Detection targetgas

Methane
CH4

Isobutane
HC (i-C4H10)*

Explosion-proof specifications

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Display range

0 – 100.0 vol%0 – 100.0 vol%0 – 100.0 vol%Detection range

0 – 100.0 vol%0 – 100.0 vol%0 – 100.0 vol%Item
Sensor model

TEF-7520P

Resolution

Alarm
setpoints

Operatingtemperature
range

Operatinghumidity
range

Hydrogen
H2
Japan Ex and
ATEX/IECEx

0.1 vol%

0.1 vol%

0.1 vol%First alarm

25.0 vol%25.0 vol%25.0 vol%Second alarm

50.0 vol%50.0 vol%50.0 vol%

TWA

-

-

-

STEL

-

-

-

OVER

100.0 vol%100.0 vol%100.0 vol%Continuous use
environment-20 °C to +50 °C-20 °C to +50 °C-20 °C to +50 °C

Temporary use
environment(approx. 15 minutes)-40 °C to +60 °C-40 °C to +60 °C-40 °C to +60 °C

Continuous use
environment

10 to 90 %RH

10 to 90 %RH

10 to 90 %RH

Temporary use
environment(approx. 15 minutes)

95 %RH or less

95 %RH or less

95 %RH or less

Indication accuracy(for identical conditions)

Within ±5 vol%Within ±5 vol%Within ±5 vol%Response time (T90)

Within 30 seconds

Within 30 seconds

Within 30 seconds* At temperatures below approximately -10 °C, isobutane (HC (i-C4H10)) may liquefy.

CAUTION The detection target gas is specified at the time of purchase.
 Sensors may be damaged in the presence of high-concentration organic gases or alcohol.
Repeat adjustment if the zero point has fluctuated.
 These sensors may also react to gases other than the detection target gas if the thermal conductivity
differs significantly from fresh air.

NOTE
 The alarm setpoints indicated in the table above can be altered. However, the setpoint cannot bechanged for those shown as “-”. (Refer to ‘7-3-1 Setting alarm setpoints’.)160/20411. Product Specifications

11-2 Sensor specifications<Non-dispersive infrared type (NDIR)>
Detection target
gas

Item
Sensor model

Methane
CH4

Isobutane
HC (i-C4H10)*

IRF-4341

IRF-4345

Explosion-proof specifications

Japan Ex and ATEX/IECEx

Japan Ex and ATEX/IECEx

Display range

0 – 100.0 %LEL/
100.0 %LEL – 100.0 vol%0 – 100.0 %LEL/
100.0 %LEL – 100.0 vol%Detection range

0 – 100.0 %LEL/
100.0 %LEL – 100.0 vol%0 – 100.0 %LEL/
100.0 %LEL – 100.0 vol%Resolution

0.5 %LEL/0.1 vol%0.5 %LEL/0.1 vol%First alarm

10.0 %LEL

10.0 %LEL

Second alarm

50.0 %LEL

50.0 %LEL

TWA

-

-

STEL

-

-

OVER

100.0 vol%100.0 vol%Continuous use
environment-20 °C to +50 °C-20 °C to +50 °C

Temporary use
environment(approx. 15 minutes)-40 °C to +60 °C-40 °C to +60 °C

Continuous use
environment

10 to 90 %RH

10 to 90 %RH

Temporary use
environment(approx. 15 minutes)

95 %RH or less

95 %RH or less

Indication accuracy(for identical conditions)

Within ±5 %LEL

Within ±5 %LEL

Response time (T90)

Within 30 seconds

Within 30 seconds

Alarm
setpoints

Operatingtemperature
range

Operatinghumidity
range* At temperatures below approximately -10 °C, isobutane (HC (i-C4H10)) may liquefy.

CAUTION Allow the product to warm up for at least 10 minutes before performing fresh air adjustment or span
adjustment.
 Ensure identical temperatures, humidity, and pressure in the gas adjustment and measurement
environments. The reading may fluctuate due to the temperature, humidity, and pressure
characteristics.
 Interference occurs due to hydrocarbons other than the target gas.
 If the composition of the base gas differs greatly for gas adjustment and measurement—for example, if
an air base is used for gas adjustment but a carbon dioxide base is used for measurement—readings
may differ due to infrared adsorption characteristics, even if the concentration of the target gas is the
same.

NOTE
 The alarm setpoints indicated in the table above can be altered. However, the setpoint cannot bechanged for those shown as “-”. (Refer to ‘7-3-1 Setting alarm setpoints’.)161/20411. Product Specifications

11-2 Sensor specifications

11-2-2 Carbon dioxide sensor<Non-dispersive infrared type (NDIR)>
Item

Carbon dioxide
CO2
IRF-4443
Japan Ex and ATEX/IECEx
0 – 20.00 vol%0 – 20.00 vol%0.01 vol% (0 – 5 vol%)0.10 vol% (5 – 20 vol%)5.00 vol%10.00 vol%20.00 vol%-20 °C to +50 °C

Detection target gas

Sensor model
Explosion-proof specifications
Display range
Detection range
Resolution
First alarm
Second alarm
TWA
STEL
OVER
Continuous use environment
Operatingtemperature Temporary use environment
range(approx. 15 minutes)
Continuous use environment
Operatinghumidity
Temporary use environment
range(approx. 15 minutes)
Indication accuracy (for identical conditions)
Response time (T90)
Alarmsetpoints-40 °C to +60 °C
10 to 90 %RH
95 %RH or lessWithin ±1 vol%Within 30 seconds

CAUTION Allow the product to warm up for at least 10 minutes before performing CO2 zero adjustment or span
adjustment.
 Ensure identical temperatures, humidity, and pressure in the gas adjustment and measurement
environments. The reading may fluctuate due to the temperature, humidity, and pressure
characteristics.
 If the composition of the base gas differs greatly for gas adjustment and measurement—for example, if
an air base is used for gas adjustment but an argon base is used for measurement—readings may
differ due to infrared adsorption characteristics, even if the concentration of the target gas is the same.

NOTE The sensors used in the product may exhibit sensitivity variations when used continuously forextended periods.
The zero follower function stabilizes the zero point by correcting reading fluctuations at the zero point(400 ppm for carbon dioxide sensors) that result from extended periods of use.
 The zero follower function can be altered using the setup program sold separately. (The default
setting is enabled.)
 The alarm setpoints indicated in the table above can be altered. However, the setpoint cannot bechanged for those shown as “-”. (Refer to ‘7-3-1 Setting alarm setpoints’.)

162/20411. Product Specifications

11-2 Sensor specifications

11-2-3 Oxygen sensor<Electrochemical type>
Item

Detection target
gas

Sensor model
Explosion-proof specifications
Display range
Detection range
Resolution
First alarm
Second alarm
Alarm
TWA
setpoints
STEL
OVER
Continuous use
environment
Operatingtemperature Temporary use
range
environment(approx. 15 minutes)
Continuous use
environment
Operatinghumidity
Temporary use
range
environment(approx. 15 minutes)
Indication accuracy(for identical conditions)
Response time (T90)

OxygenO2
ESR-X13P
Japan Ex0 – 40.0 %0 – 25.0 %0.1 %18.0 %
25.0 %
40.0 %

ATEX/IECEx
0 – 40.0 %0 – 25.0 %0.1 %19.5 %
23.5 %
40.0 %-20 °C to +50 °C-20 °C to +50 °C-40 °C to +60 °C-40 °C to +60 °C

10 to 90 %RH

10 to 90 %RH

95 %RH or less

95 %RH or lessWithin ±0.7 vol%Within ±0.7 vol%Within 20 seconds

Within 20 seconds

CAUTION The electrolyte consists of sulfuric acid. Do not attempt to disassemble the sensor.
 Each sensor has a specified installation position on the main unit. Sensors will not function correctly if
installed in the wrong location or not properly oriented. Applying excessive force to install sensors may
damage the sensor and main unit. It may also result in sensor failure.
 The label indicating the gas name also constitutes an important part. Avoid damaging or fouling thelabel. Using while damaged may prevent the product from sampling gas correctly.
 Do not press or peel off the silver label affixed to the sensor. Doing do may result in measurement
performance that falls short of specifications.
 Do not use any gas other than nitrogen (N2) as the balance gas for gas adjustment. Otherwise, reading
errors will increase, preventing accurate measurement.
 Do not expose to sudden pressure fluctuations. The reading will fluctuate briefly, preventing accurate
measurement.
 Do not subject the sampling tube or other pipes to positive or negative pressure. Applying pressure
may cause the reading to fluctuate and trigger an alarm. If the reading changes, remove any pressure
applied before resuming use.

163/20411. Product Specifications

11-2 Sensor specifications

NOTE
 Ambient temperatures and humidity can affect the sensor used to detect gas. They are also affectedby interference from the gas being measured.
These factors may cause readings to fluctuate around zero.
The zero suppression function is designed to smooth out fluctuations around the zero level. Use thisfunction to suppress fluctuation of the reading below the preset value (20.4 – 21.4 % for the oxygen
sensor) to give a zero reading (or 20.9 % for the oxygen concentration display).
 The suppression function can be altered using the setup program sold separately. (The default setting

is enabled.) Following is not performed with the oxygen sensor, even if the zero follower function is enabled using

the setup program sold separately.
 The alarm setpoints indicated in the table above can be altered. However, the setpoint cannot bechanged for those shown as “-”. (Refer to ‘7-3-1 Setting alarm setpoints’.)164/20411. Product Specifications

11-2 Sensor specifications

11-2-4 Toxic gas sensors<Electrochemical type (ESR sensors)>
Item

Detection target
gas

Sensor model
Explosion-proof specifications
Display range
Detection range
Resolution
First alarm
Second alarm
Alarm
TWA
setpoints
STEL
OVER
Continuous use
environment
Operatingtemperature Temporary use
range
environment(approx. 15 minutes)
Continuous use
environment
Operatinghumidity
Temporary use
range
environment(approx. 15 minutes)

Hydrogen sulfide
H2S (low concentration)
ESR-A13i
Japan ExATEX/IECEx
0 – 200.0 ppm
0 – 200.0 ppm
0 – 30.0 ppm
0 – 100.0 ppm
0.1 ppm
0.1 ppm
1.0 ppm
5.0 ppm
10.0 ppm
30.0 ppm
1.0 ppm
1.0 ppm
5.0 ppm
5.0 ppm
200.0 ppm
200.0 ppm

Carbon monoxide
CO
ESR-A13P
Japan ExATEX/IECEx
0 – 2,000 ppm
0 – 2,000 ppm
0 – 500 ppm
0 – 500 ppm
1 ppm
1 ppm
25 ppm25 ppm50 ppm50 ppm25 ppm25 ppm200 ppm
200 ppm
2,000 ppm
2,000 ppm

-20 °C to +50 °C-20 °C to +50 °C-20 °C to +50 °C-20 °C to +50 °C-40 °C to +60 °C-40 °C to +60 °C-40 °C to +60 °C-40 °C to +60 °C

10 to 90 %RH

10 to 90 %RH

10 to 90 %RH

10 to 90 %RH

95 %RH or less

95 %RH or less

95 %RH or less

95 %RH or lessWithin ± 1.5 ppm(0 – 30 ppm)
Within ± 20 % ofreading(30 – 100.0 ppm)
Within 30 seconds

Within ± 15 ppm(0 – 30 ppm)
Within ± 20 % ofreading(30 – 500 ppm)
Within 30 seconds

Within ± 15 ppm(0 – 30 ppm)
Within ± 20 % ofreading(30 – 500 ppm)
Within 30 seconds

Indication accuracy(for identical conditions)

Within ± 1.5 ppm(0 – 30 ppm)

Response time (T90)

Within 30 seconds

CAUTION The electrolyte consists of sulfuric acid. Do not attempt to disassemble the sensor.
 Each sensor has a specified installation position on the main unit. Sensors will not function correctly if
installed in the wrong location or not properly oriented. Applying excessive force to install sensors may
damage the sensor and main unit. It may also result in sensor failure.
 The label indicating the gas name also constitutes an important part. Avoid damaging or fouling thelabel. Using while damaged may prevent the product from sampling gas correctly.
<ESR-A13i>
 A humidity control filter must be fitted when this sensor is used. The effects of humidity will increase
the possibility of false alarms.
 Condensation or the presence of significant moisture in the humidity control filter will significantly
impair gas sensitivity. If there is reason to believe condensation may have occurred inside the pipes—
for example, in cases in which the air drawn in is warmer or more humid than the operating
temperature and humidity range—draw in fresh air and check to confirm that gas sensitivity is normal
before resuming use.
<ESR-A13P>
 An activated carbon filter must be fitted when this sensor is used. The effects of interference gases will
increase the possibility of false alarms.

165/20411. Product Specifications

11-2 Sensor specifications

 The activated carbon filter has a finite service life. If the reading varies significantly from when new,even when used in the same way, the filter is life expired. Replace the filter.

NOTE
 Gas detection sensors are affected by environmental factors such as temperature and humidity. They

are also affected by the interference of the detection target gas.
Therefore, these factors may cause readings to fluctuate around zero.
The zero suppression function is designed to smooth out fluctuations around the zero level. Use thisfunction to suppress fluctuation of the reading below the preset value* to give a zero reading.
* For hydrogen sulfide sensors: 0.3 ppm, for carbon monoxide sensors: 3 ppm
 The sensors used in the product may exhibit sensitivity variations when used continuously forextended periods.
The zero follower function stabilizes the zero point by correcting reading fluctuations at the zero pointthat result from extended periods of use.
 The suppression function can be altered using the setup program sold separately. (The default setting

is enabled.)
 The zero follower function can be altered using the setup program sold separately. (The default

setting is enabled.)
 The alarm setpoints indicated in the table above can be altered. (Refer to ‘7-3-1 Setting alarm

setpoints’.)

166/20411. Product Specifications

11-2 Sensor specifications<Electrochemical type (ESF sensors)>
Item

Detection target
gas

Sensor model
Explosion-proof specifications
Display range
Detection range
Resolution
First alarm
Second alarm
Alarm
TWA
setpoints
STEL
OVER
Continuous use
environment
Operatingtemperature Temporary use
range
environment(approx. 15 minutes)
Continuous use
environment
Operatinghumidity
Temporary use
range
environment(approx. 15 minutes)
Indication accuracy(for identical conditions)
Response time (T90)
Item

Detection target
gas

Sensor model
Explosion-proof specifications
Display range
Detection range
Resolution
First alarm
Second alarm
Alarm
TWA
setpoints
STEL
OVER
Continuous use
environment
Operatingtemperature Temporary use
range
environment(approx. 15 minutes)
Continuous use
environment
Operatinghumidity
Temporary use
range
environment(approx. 15 minutes)

Hydrogen sulfide
H2S (highconcentration)
ESF-A24R2
Japan Ex and
ATEX/IECEx
0 – 1,000 ppm
0 – 1,000 ppm
1 ppm
1,000 ppm
1,000 ppm
OFFOFF
1,000 ppm

Ammonia
NH3

Chlorine
Cl2

Ozone
O3

ESF-B242
Japan Ex and
ATEX/IECEx
0 – 75.0 ppm
0 – 75.0 ppm
0.5 ppm
25.0 ppm
50.0 ppm
25.0 ppm
35.0 ppm
75.0 ppm

ESF-C930
Japan Ex and
ATEX/IECEx
0 – 1.50 ppm
0 – 1.50 ppm
0.01 ppm
0.50 ppm
1.00 ppm
0.50 ppm
1.00 ppm
1.50 ppm

ESF-B249
Japan Ex and
ATEX/IECEx
0 – 0.600 ppm
0 – 0.600 ppm
0.005 ppm
0.100 ppm
0.200 ppm
0.100 ppm
OFF0.600 ppm

-20 °C to +50 °C-20 °C to +50 °C

0 °C to +50 °C

10 °C to +40 °C-40 °C to +60 °C-40 °C to +60 °C-40 °C to +60 °C

10 °C to +40 °C

20 to 90 %RH

30 to 80 %RH

30 to 80 %RH

30 to 80 %RH

95 %RH or less

95 %RH or less

95 %RH or less

95 %RH or less

Reading ±20 %Within ±7.5 ppm

Within ±0.15 ppm

Within ±0.06 ppm

9 seconds (typical)

19 seconds (typical)

53 seconds (typical)

10 seconds (typical)

Hydrogen chloride
HCl
ESF-A24E2
Japan Ex and ATEX/IECEx
0 – 6.00 ppm
0 – 6.00 ppm
0.05 ppm
2.00 ppm
4.00 ppm
OFFOFF
6.00 ppm

Sulfur dioxide
SO2
ESF-A24D4
Japan Ex and ATEX/IECEx
0 – 100.0 ppm
0 – 100.0 ppm
0.1 ppm
2.0 ppm
5.0 ppm
2.0 ppm
5.0 ppm
100.0 ppm

Hydrogen cyanide
HCN*
ESF-A24D
Japan Ex0 – 15.0 ppm
0 – 15.0 ppm
0.1 ppm
5.0 ppm
10.0 ppm
OFF
4.7 ppm
15.0 ppm

0 °C to +40 °C-20 °C to +50 °C-20 °C to +50 °C

0 °C to +40 °C-40 °C to +60 °C-40 °C to +60 °C

20 to 90 %RH

20 to 90 %RH

20 to 90 %RH

95 %RH or less

95 %RH or less

95 %RH or less

Indication accuracy(for identical conditions)

Within ±0.6 ppm

Response time (T90)

46 seconds (typical)

Within ±0.3 ppm (0 – 6 ppm)
Within ±10 % of reading(6 – 100 ppm)
21 seconds (typical)

Within ±1.5 ppm
33 seconds (typical)* ATEX/IECEx models are not available. Cannot be installed for export outside Japan due to export restrictions.

167/20411. Product Specifications

11-2 Sensor specifications

CAUTION The electrolyte consists of sulfuric acid. Do not attempt to disassemble the sensor.
 Sensors will not operate if installed in the wrong direction. Forcibly installing sensors may damage thesensor and main unit. It may also result in sensor failure.
 When measuring in locations where hydrogen sulfide (H2S) may be present at high concentrations,
measure using H2S high concentration measurement mode.
 When measuring hydrogen sulfide concentrations, first check to confirm that the hydrogen sulfide
concentration is below 100 ppm in H2S high concentration measurement mode before measuring
combustible gas and oxygen concentrations in H2S low concentration measurement mode.
Sucking in high concentrations of hydrogen sulfide (H2S) while in H2S low concentration measurementmode may damage the combustible gas (new ceramic type), carbon monoxide, and low concentrationhydrogen sulfide sensors.
<ESF-C930/ESF-B249>
 Sensitivity will be reduced temporarily if the sensor comes into contact with hydrogen sulfide (H2S).

NOTE
 The alarm setpoints indicated for setpoints in the table above can be changed (or disabled). (Refer to‘7-3-1 Setting alarm setpoints’.)168/20411. Product Specifications

11-2 Sensor specifications

11-2-5 VOC sensors<Photo-ionization type (PID)>
Item

Detection
target gas

Sensor model
Photo-ionization energy
Explosion-proof specifications
Display range
Detection range
Resolution
First alarm
Second alarm
TWA
STEL
OVER
Continuous use
environment
Operatingtemperature Temporary use
range
environment(approx. 15 minutes)
Continuous use
environment
Operatinghumidity
Temporary use
range
environment(approx. 15 minutes)
Indication accuracy(for identical conditions)
Response time (T90)
Alarmsetpoints

Volatile organic
Volatile organic
Volatile organic
compounds
compounds
compounds
VOCs
VOCs
VOCs
PIF-001
PIF-002
PIF-00310.6 eV
10.6 eV
10.0 eVJapan Ex and ATEX/IECEx Japan Ex and ATEX/IECEx Japan Ex and ATEX/IECEx
0 – 40,000 ppb
0 – 4,000 ppm
0 – 100.0 ppm
0 – 40,000 ppb
0 – 4,000 ppm
0 – 100.0 ppm
1 ppb (0 – 4,000 ppb)
0.1 ppm (0 – 400.0 ppm)
0.01 ppm (0 – 10.00 ppm)
10 ppb (4,000 – 40,000 ppb) 1 ppm (400.0 – 4,000 ppm) 0.1 ppm (10.00 – 100.0 ppm)
5,000 ppb
400.0 ppm
5.00 ppm
10,000 ppb
1,000 ppm
10.0 ppm
OFF
OFF
OFF
OFF
OFF
OFF
40,000 ppb
4,000 ppm
100.0 ppm
-20 °C to +50 °C-20 °C to +50 °C-20 °C to +50 °C-40 °C to +60 °C-40 °C to +60 °C-40 °C to +60 °C

10 to 90 %RH

10 to 90 %RH

10 to 90 %RH

95 %RH or less

95 %RH or less

95 %RH or lessWithin ±2,500 ppb

Within ±180 ppm

Within ±5 ppm

Within 30 seconds

Within 30 seconds

Within 30 seconds

CAUTION If the VOC sensor is exposed to high concentrations of methane (CH4), ethane (C2H6), propane (C3H8),or other gases, [----] may appear on the concentration display, the lamps may flash, and the buzzer
may sound, temporarily disabling measurement.
In environments where these gases are present, even if the concentration display does not indicate[----], be aware that the VOC concentration may not be accurately measured.
Note that, even if the VOC sensor concentration display indicates [----], other unaffected sensors cancontinue measurement.
<Example interference gases causing [----] to be displayed on the VOC sensor concentration display>
Interference gas
Concentration
Methane (CH4)
6 vol% or more
Ethane (C2H6)
80 vol% or more
Propane (C3H8)
90 vol% or more

NOTE The alarm setpoints indicated for setpoints in the table above can be changed (or disabled). (Refer to‘7-3-1 Setting alarm setpoints’.)169/20412. Appendix

12-1 Data logger function

12

Appendix12-1 Data logger function
The product is equipped with a data logger function that records measurement results and events such as
gas alarms, fault alarms, and gas adjustment.

NOTE
 The data logger management program sold separately is required to check data recorded using thedata logger function. Contact RIKEN KEIKI for more information.
The data logger provides the following five functions:(1) Interval trend
Records the changes in measured concentration from the start of measurement until the power is turned off.
If the alarm type is H-HH or L-LL, the average value, maximum value, and maximum value detection time
are recorded; if the alarm type is L-H, the average value, minimum value, and minimum value detection time
are recorded,
The 3,600 most recent data items are recorded.
If the number of items exceeds 3,600, the oldest data will be overwritten by the latest data.
However, if the maximum recording time is exceeded, the oldest data will be deleted before reaching 3,600.
The maximum recording times corresponding to different intervals are as follows:
Interval

10 seconds 20 seconds 30 seconds

1 minute

3 minutes

5 minutes

10 minutes

Maximum
recording time

10 hours

60 hours

180 hours

300 hours

600 hours

20 hours

30 hours

The standard interval is five minutes.
The interval can be set using the data logger management program sold separately.

(2) Alarm trend
When an alarm is triggered, this function records the changes in measured concentration for 30 minutes
before and after the alarm occurred (one hour in total).
Alarm trend records peak values (maximum values for H-HH and minimum values for L-H or L-LL alarm
types) over five-second periods at five-second intervals.
The eight most recent data items are recorded.
If the number of items exceeds 8, the oldest data will be overwritten by the latest data.

(3) Alarm event
Records alarm occurrences as events.
This function records the time the alarm was triggered, the detection target gas, and the type of alarm event.
The 100 most recent events are recorded.
If the number of items exceeds 100, the oldest data will be overwritten by the latest data.

170/20412. Appendix

12-1 Data logger function(4) Trouble event
Records fault alarm occurrences as events.
This function records the time when the fault alarm was triggered, the detection target gas, device
information, and the type of trouble event.
The 100 most recent events are recorded.
If the number of items exceeds 100, the oldest data will be overwritten by the latest data.

(5) Adjustment history
Records data when adjustment is performed.
Records the adjustment time and concentrations before and after adjustment.
The 100 most recent adjustment history data items are recorded.
If the number of items exceeds 100, the oldest data will be overwritten by the latest data.

NOTE If a USB connection is detected while the date and time or battery voltage is displayed after the poweris turned on, the product enters communication mode. Communication mode can also be selected bypressing the RESET/▼ and DISP/ESC buttons together while the date and time or battery voltage isdisplayed during startup.
 A fault alarm will be triggered if no communication connection can be confirmed for a preset durationin communication mode. If this occurs, either repeat the communication connection or turn off thepower for the product.

171/20412. Appendix

12-2 100 %LEL conversion list

12-2 100 %LEL conversion list
The following table shows the standard conversion for 100 %LEL and ppm. The 100 %LEL values are
standard values for both Japan Ex and ATEX/IECEx models.
Standard

IEC

ISO

MethaneGas type
CH450,000 ppm*2

44,000 ppm

44,000 ppm

Isobutane

HC (i-C4H10)

18,000 ppm*3

13,000 ppm

15,000 ppm

HydrogenH2

40,000 ppm*2

40,000 ppm

40,000 ppm

Methanol

CH3OH

55,000 ppm*1

60,000 ppm

60,000 ppm

Acetylene

C2H2

15,000 ppm*1

23,000 ppm

23,000 ppm

Ethylene

C2H4

27,000 ppm*2

23,000 ppm

24,000 ppm

EthaneC2H630,000 ppm*2

24,000 ppm

24,000 ppm

Ethanol

C2H5OH

33,000 ppm*2

31,000 ppm

31,000 ppm

Propylene

C3H6

20,000 ppm*2

20,000 ppm

18,000 ppm

Acetone

C3H6O

21,500 ppm*1

25,000 ppm

25,000 ppm

PropaneC3H8

20,000 ppm*1

17,000 ppm

17,000 ppm

Butadiene

C4H6

11,000 ppm*1

14,000 ppm

14,000 ppm

Cyclopentane

C5H10

14,000 ppm*4

14,000 ppm

14,000 ppm

Benzene

C6H6

12,000 ppm*1

12,000 ppm

12,000 ppm

N-hexanen-C6H14

12,000 ppm*1

10,000 ppm

10,000 ppm

Toluene

C7H8

12,000 ppm*2

10,000 ppm

10,000 ppm

N-heptane

n-C7H16

11,000 ppm*2

8,500 ppm

8,000 ppm

XyleneC8H1010,000 ppm*2

10,000 ppm

10,000 ppm

N-nonane

n-C9H20

7,000 ppm*57,000 ppm

7,000 ppm

Ethyl acetate

EtAc

21,000 ppm*1

20,000 ppm

20,000 ppm

Isopropyl alcohol

IPA

20,000 ppm*2

20,000 ppm

20,000 ppm

Methyl ethyl ketone

MEK

18,000 ppm*2

15,000 ppm

15,000 ppm

Methyl methacrylate

MMA

17,000 ppm*2

17,000 ppm

17,000 ppm

Dimethyl ether

DME

30,000 ppm*1

27,000 ppm

27,000 ppm

Methyl isobutyl ketone

MIBK

12,000 ppm*3

12,000 ppm

12,000 ppm

Tetrahydrofuran

THF

20,000 ppm*2

15,000 ppm

15,000 ppm

Normal pentane

n-C5H1215,000 ppm*2

11,000 ppm

11,000 ppm*1: Recommended Practices for Explosion-Protected Electrical Installations in General Industries (NIIS/1985)*2: Recommended Practices for Explosion-Protected Electrical Installations in General Industries (NIIS/2006)*3: Technical recommendations of the Research Institute of Industrial Safety (NIIS/1994)*4: Chemical Safety Management Data Book (The Chemical Daily Co., Ltd.)*5: Product Safety Data Sheet (Eishin Kagaku Co., Ltd.)

172/20412. Appendix

12-3 Zero suppression function

12-3 Zero suppression function
Gas sensors are affected by environmental factors such as temperature and humidity characteristics. They
are also substantially affected by the interference of the detection target gas. Environmental andinterference effects may cause the product reading to fluctuate around zero.
The zero suppression function is designed to suppress notifications of fluctuations around zero. The function
suppresses reading fluctuations below the set value and displays zero instead (or 20.9 % for the oxygen
sensor).

NOTE
 The default setting is enabled. To disable the setting, use the MT-9000 Series Setup Program soldseparately and refer to the operating manual. If the setting is disabled, readings may fluctuate due to
output variations attributable to sensor characteristics.
 Even when enabled, the zero suppression function will function only in measurement mode anddisplay mode.
 All readings in the range from zero to the negative suppression value indicated in the following table
are suppressed. Values from the negative suppression value to the M OVER value will be displayed,
but accurate measurements cannot be achieved in this state. Fresh air adjustment should be
performed. For information on M OVER values, refer to ‘4-2 Gas alarm setpoints’.
The zero suppression function settings are as follows:<R sensors>
Sensor
ESR-X13P
ESR-A13i
ESR-A13P

Negative
Negative
suppression suppression
value
type

Detection target gas

Suppression
value

Suppression
type

Oxygen (O2)20.9 % ± 0.5 %(20.4 – 21.4 %)Cut-air-0.5 %

Cut-off

0.3 ppm

Cut-off-1.5 ppm

Cut-off

2 ppm

Cut-off-25 ppm

Cut-off

Suppression
value

Suppression
type2 – 5 %LEL

Smoothing-5 %LEL

Cut-off

0.9 vol%

Cut-off-5.0 vol%Cut-off

N/A
N/A
N/A

N/A
N/A
N/A

-5 %LEL-5 %LEL-1 vol%Cut-off
Cut-off
Cut-off

Hydrogen sulfide (H2S)(low concentration)
Carbon monoxide (CO)<F sensors>
Sensor

NCF-6322P

TEF-7520P
IRF-4341
IRF-4345
IRF-4443
ESF-A24R2
ESF-B242
ESF-C930
ESF-B249
ESF-A24E2
ESF-A24D4

Detection target gas
Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)
Acetylene (C2H2)
Methane (CH4)
Isobutane (HC (i-C4H10))
Hydrogen (H2)Methane (CH4)
Isobutane (HC (i-C4H10))
Carbon dioxide (CO2)
Hydrogen sulfide (H2S)(high concentration)
Ammonia (NH3)
Chlorine (Cl2)
Ozone (O3)
Hydrogen chloride (HCl)
Sulfur dioxide (SO2)

Negative
Negative
suppression suppression
value
type

20 ppmCut-off-50 ppm

Cut-off

10.0 ppm
0.09 ppm
0.035 ppm
0.35 ppm
0.4 ppm

Cut-off
Cut-off
Cut-off
Cut-off
Cut-off-5.0 ppm-0.08 ppm
-0.030 ppm-0.30 ppm
-5.0 ppm

Cut-off
Cut-off
Cut-off
Cut-off
Cut-off

173/20412. Appendix

12-4 Zero follower function

Sensor

Detection target gas

ESF-A24D(Japan Ex model)

Hydrogen cyanide(HCN)
Volatile organic
compounds(VOC, 10.6 eV, ppb)
Volatile organic
compounds(VOC, 10.6 eV, ppm)
Volatile organic
compounds(VOC, 10.0 eV, ppm)

PIF-001

PIF-002

PIF-003

Negative
Negative
suppression suppression
value
type

Suppression
value

Suppression
type

0.9 ppm

Cut-off-0.8 ppm

Cut-off

N/A

N/A-20 ppm

Cut-off

N/A

N/A-2,000 ppm

Cut-off

N/A

N/A-50 ppm

Cut-off

12-4 Zero follower function
The sensors used in the product may exhibit zero point fluctuations when used for extended periods.
The zero follower function stabilizes the zero point by adjusting reading fluctuations at the zero point that
result from extended periods of use.
Combustible gas sensors

The sensor output is tracked to zero the value if output fluctuations
occur below the stipulated value when the power is turned on.

Sensors other than combustible
gas sensors

The sensor output is tracked to zero the value if the sensor output
repeatedly drops below zero when the power is turned on.

* The zero follower function is enabled when the power is turned on.

NOTE
 The default setting is enabled. To disable the setting, use the MT-9000 Series Setup Program soldseparately and refer to the operating manual. When the setting is disabled, the zero point may
fluctuate due to output variation caused by the sensor characteristics.
 The zero follower function is not enabled for the oxygen sensor.

174/20412. Appendix

12-5 Volatile organic compound (VOC) conversion gas list

12-5 Volatile organic compound (VOC) conversion gas list
Volatile organic compound (VOC) concentration is normally displayed as isobutylene (C4H8), but this can be displayed converted to a pre-registered gas.
For information on the setting procedure, refer to ‘6-4-3 Volatile organic compound (VOC) conversion gas selection’.
Gas types for which “-” is indicated in the Conversion factor (10.6 eV/10.0 eV) column cannot be measured using VOC sensors (10.6 eV/10.0 eV).
Gas name (displayed name)Acetaldehyde
Acetamide
Acetic acidAcetic anhydride
Acetoin
AcetoneAcetone cyanohydrin
Acetophenone
Acetyl bromide
Acetylene
Acetylglycine, NAcrolein
Acrylic acid
Acrylonitrile
Alkanes, n-, C6+
Allyl acetoacetate
Allyl alcohol
Allyl bromide
Allyl chloride
Allyl glycidyl ether
Allyl propyl disulfide
Ammonia
Amyl acetate
Amyl alcohol
Amyl alcohol, tertAnethole
AnilineAnisoleGas name (alias)

FormulaAcetaldehyde
Acetamide
Acetic acidAcetic anhydride
Acetoin
AcetoneC2H4O
C2H5NOC2 H 4O 2
C4H6O3C4H8O2C3H6O
C4H7NO
C8H8O
C2H3BrO
C2H2
C4H7NO3C3H4O
C3H4O2C3H3N
CnH2n+2
C7H10O3C3 H 6 O
C3H5BrC3H5Cl
C6H10O2
C6H12S2NH3
C7H14O2
C5H12OC5H12OC10H12O
C6H7N
C7H8O

Acetophenone
Acetyl bromiden-acetylglycine
Acrolein
Acrylic acid
Normal alkane (C6+)
Allyl acetoacetate
Allyl alcohol
Allyl bromide
Allyl chloride
Allyl glycidyl ether
Allyl propyl disulfide
Ammonian-amyl acetate
Amyl alcohol
tert-amyl alcohol
Anethole
AnilineAnisole175/204

CAS number
75-07-060-35-5
64-19-7
108-24-7
513-86-0
67-64-1
98-86-2
506-96-7
543-24-8
107-02-8
79-10-71118-84-9
107-18-6
106-95-6
107-05-1
106-92-3
2179-59-1
7664-41-7
628-63-7
71-41-075-85-4
104-46-1
62-53-3
100-66-3

Conversion
factor
(10.6 eV)
3.4
2
36.2
4
1
0.7
0.6
3
2
3.2
2.7
1
1.5
2.1
3
4.5
0.8
0.4
8.5
1.8
3.5
1.5
0.4
0.48
0.5

Conversion
factor
(10.0 eV)
1.20
4
9
10
2.8
0.8
0.59

12. Appendix

Gas name (displayed name)Anisyl aldehyde
ArsineAsphalt, petroleum fumes
Benzaldehyde
BenzeneBenzene thiol
Benzoic acid
Benzonitrile
Benzoquinone, oBenzoquinone, pBenzoyl bromide
Benzyl 2-phenylacetate
Benzyl acetate
Benzyl alcohol
Benzyl chloride
Benzyl formate
Benzyl isobutyrate
Benzyl nitrile
Benzyl propionate
Benzylamine
Biphenyl
BorneolBromineBromo-2,2-dimethylpropane, 1Bromo-2-chloroethane, 1Bromo-2-methylpentane, 1Bromoacetone
Bromoacetylene
Bromobenzene
Bromobutane, 1Bromobutane, 2Bromocyclohexane
Bromoethane

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaAnisaldehyde
ArsineAsphaltum
Benzaldehyde
BenzeneBenzenethiol
Benzoic acid
Benzonitrileo-benzoquinone
p-benzoquinone
Benzoyl bromide
Benzyl phenylacetate
Benzyl acetate
Benzyl alcohol
Benzyl chloride
Benzyl formate
Benzyl isobutyrate
Benzyl cyanide
Benzyl propionate
Benzylamine
Biphenyl
BorneolBromine1-bromo-2,2-dimethylpropane
1-bromo-2-chloroethane
1-bromo-2-methylpentane
Bromoacetone
Bromoacetylene
Bromobenzene
1-bromobutane,sec-butyl bromide
Bromocyclohexane
Bromoethane

C8H8O2
AsH3
C7H6O
C6H6
C6H5SHC7H6O2C7H5N
C6H4O2C6H4O2
C7H5BrO
C15H14O2
C9H10O2C7H8O
C7H7ClC8H8O2
C11H14O2
C8H7N
C10H12O2
C7H9N
C12H10
C10H18O
Br2
C5H11BrC2H4BrCl
C6H13BrC3H5BrO
C2HBr
C6H5BrC4H9BrC4H9BrC6H11BrC2H5Br176/204

CAS number
123-11-5
7784-42-1
8052-42-4
100-52-7
71-43-2
108-98-5
65-85-0
100-47-0
583-63-1
106-51-4
618-32-6
102-16-9
140-11-4
100-51-6
100-44-7
104-57-4
103-28-6
140-29-4
122-63-4
100-46-9
92-52-4
507-70-07726-95-6
630-17-1
107-04-025346-33-2
598-31-2
593-61-3
108-86-1
109-65-9
78-76-2
108-85-0
74-96-4

Conversion
factor
(10.6 eV)
0.4
2.5
1
0.9
0.46
0.7
0.7
0.7
1
1
2
0.5
0.6
1.3
0.48
0.8
0.5
1
0.5
0.6
0.4
0.8
15
2
8
2
1
4
0.3
1
1.5
3
5

Conversion
factor
(10.0 eV)
0.9
0.54
0.8
0.8
1.6
0.7
0.6
0.32
14
1.6
-

12. Appendix

Gas name (displayed name)Bromoethanol, 2Bromoethyl methyl ether, 2Bromoform
Bromopentane, 1Bromopropane, 1Bromopyridine, 3Bromopyridine, 4Bromotrimethylsilane
But-2-ynal
But-3-ynal
Butadiene diepoxide, 1,3Butadiene, 1,3Butane, nButanedione, 2,3Butanoic acid
Butanol, 1Butanol, 2Buten-3-ol, 1Butene, 1Butene, 2Butene, cis-2Butene, trans-2Butenoic acid, 3Butoxyethanol, 2Butoxyethoxyethanol
Butoxyethylacetate, 2Butyl acetate
Butyl acetate, secButyl acetate, tertButyl acrylate
Butyl butyrate
Butyl chloroformate
Butyl cyclohexan-1-ol, 4- tert-

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaEthylene bromohydrin
2-bromoethyl methyl ether
Bromoform
1-bromopentane
Normal propyl bromide
3-bromopyridine
4-bromopyridine
Bromotrimethylsilane
2-butynal
3-butyn-1-one
1,3-butadiene diepoxide
Butadiene
Normal butane
2,3-butanedione
Butyric acid
Normal butyl alcohol
2-Butanol
1-buten-3-ol
1-butene
2-butenecis-2-butene
trans-2-butene
Crotonic acid
Ethylene glycol monobutyl ether
Diethylene glycol monobutyl ether
Ethylene glycol monobutyl ether acetate
Butyl acetatesec-butyl acetate
tert-butyl acetate
n-butyl acrylate
Butyl butyrate
Butyl chloroformate
4-tert-butyl cyclohexan-1-ol
177/204

C2H5BrO
C3H7BrO
CHBr3
C5H11BrC3H7BrC5H4BrN
C5H4BrN
C3H9BrSi
C4H4O
C4H4O
C4 H 6 O 2
C4H6
C4H10
C4H6O2C4H8O2
C4H10OC4H10O
C4H8O
C4H8
C4H8
C4H8
C4H8
C4H6O2
C6H14O2
C8H18O3
C8H16O3
C6H12O2
C6H12O2
C6H12O2
C7H12O2
C8H16O2
C5H9ClO2
C10H20O

CAS number
540-51-2
6482-24-2
75-25-2
110-53-2
106-94-5
626-55-1
1120-87-2
2857-97-8
1119-19-3
52844-23-2
1464-53-5
106-99-0
106-97-8
431-03-8
107-92-6
71-36-3
78-92-2
598-32-3
106-98-9
107-01-7
590-18-1
624-64-6
107-93-7
111-76-2
112-34-5
112-07-2
123-86-4
105-46-4
540-88-5
141-32-2
109-21-7
592-34-7
98-52-2

Conversion
factor
(10.6 eV)
2
2.5
2.8
2
1.3
2
2
2
3
1.5
4
0.8
44
0.4
5
4
3.0
1.2
1.5
1.3
1.3
1.3
2
1.1
1.0
3
2.4
2.4
2
1.5
1.8
3.2
1.4

Conversion
factor
(10.0 eV)
3.5
70
0.8
0.87
25
8
3
12
5.5
1.65
-

12. Appendix

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (displayed name)
Butyl cyclohexyl acetate, 2- tertButyl ether, nButyl glycidyl ether
Butyl iodide
Butyl isocyanate
Butyl lactate
Butyl mercaptan, nButyl mercaptan, tertButyl methacrylate
Butyl propionate, nButylamine, nButylamine, secButylamine, tertButylbenzene
Butylbenzene, secButylbenzene, tertButylene carbonate, 1,2Butylphenol, o-secButyn-1-ol, 2Butyn-2-one
Butyraldehyde
Butyrolactone, gammaButyronitrile
Butyryl chloride
Camphene
Camphor
Carbon disulfide
Carbon suboxide
Carbon tetrabromide
Carbon tetrachloride
Carbonyl sulfide
CareneCarvacrol
Carvone, R-

Gas name (alias)

Formula2-tert-butyl cyclohexyl acetate
Dibutyl ether
Butyl glycidyl ether
Butyl iodide
n-butyl isocyanate
Butyl lactate
n-butyl mercaptan
tert-butyl mercaptan
n-Butyl methacrylate
Butyl propionate
Monobutylamine
sec-butylamine
tert-butylamine
Butylbenzene
sec-butylbenzene
tert-butylbenzene
1,2-butylene carbonate
o-sec-butylphenol
2-butyn-1-ol
3-butyn-2-one
Normal butyl aldehyde
γ-butyrolactone

C12H22O2
C8H18OC7H14O2
C4H9I
C5H9NOC7H14O3
C4H10S
C4H10SC8H14O2
C7H14O2
C4H11N
C4H11N
C4H11N
C10H14
C10H14
C10H14C5H8O3
C10H14O
C4H6O
C4H4O
C4H8O
C4H6O2C4H7N
C4H7ClO
C10H16
C10H16O
CS2
C3O2
CBr4
CCl4
COS
C10H16
C10H14O
C10H14O

Butyryl chloride(+/-)-camphene(+/-)-camphor
Carbon disulfide
Carbon suboxide
Carbon tetrabromide(+)-3-carene
Carvacrol
l-carvone
178/204

CAS number
88-41-5
142-96-1
2426-08-6
542-69-8
111-36-4
138-22-7
109-79-5
75-66-1
97-88-1
590-01-2
109-73-9
513-49-5
75-64-9
104-51-8
135-98-8
98-06-64437-85-8
89-72-5
764-01-2
1423-60-5
123-72-8
96-48-0
141-75-3
565-00-4
76-22-2
75-15-0504-64-3
558-13-4

13466-78-9
499-75-2
6485-40-1

Conversion
factor
(10.6 eV)
0.8
0.7
2
1
2.5
2.5
0.5
0.4
1
1.8
1
0.9
0.9
0.5
0.4
0.4
2
0.9
1.5
3
1.6
15
3
0.5
0.4
1.4
10
3
0.5
0.8
1

Conversion
factor
(10.0 eV)
1.10
4
1.5
0.45
0.4
0.4
1.9
0.4
1.3
1.5

12. Appendix

Gas name (displayed name)
Caryophyllene
Chloramine
Chlorine
Chloro-1,1-difluoroethene, 2Chloro-1-fluoroethane, 1Chloro-2-fluoroethane, 1Chloro-2-propanone, 1Chloroacetaldehyde
Chlorobenzene
Chlorobutane, 1Chlorobutane, 2Chlorocyclohexane
Chloroethyl methyl ether, 2Chloroethane
Chloroform
Chloromethane
Chloromethoxyethane
Chloroprene
Chloropyridine, 2Chlorostyrene, oChlorotoluene, mChlorotoluene, oChlorotoluene, pChlorotrifluoroethylene
Cinnamic aldehyde
Cinnamyl acetate
Cinnamyl alcohol
CitralCitronellal
Citronellol
Citronellol acetate
Citronellol formate
Citronellyl isobutyrate

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

Formula(Z)-4,11,11-trimethyl-8methylenebicyclo[7.2.0]undec-4-ene
Chloramine
2-chloro-1,1-difluoroethylene

Chloroacetone
Chloroacetaldehyde
Monochlorobenzene
n-butyl chloride
2-chlorobutane
Chlorocyclohexane
2-chloroethyl methyl ether

Chloromethoxyethane
Chloroprene
2-chloropyridine
o-chlorostyrenem-chlorotoluene
Chlorotoluene
p-chlorotoluene
Chlorotrifluoroethylene
Cinnamic aldehyde
Cinnamyl acetate
Cinnamyl alcohol
CitralCitronellal(+/-)-Citronellol
Citronellol acetate
Citronellol formate
Citronellyl isobutyrate
179/204

CAS number

Conversion
factor
(10.6 eV)

Conversion
factor
(10.0 eV)

C15H2413877-93-5

0.4

-

ClH2N
Cl2
C2HClF2C2H4ClF
C2H4ClF
C3H5ClO
C2H3ClO
C6H5ClC4H9ClC4H9Cl
C6H11Cl
C3H7ClO
C2H5ClCHCl3
CH3Cl
C3H7ClO
C4H5ClC5H4ClN
C8H7ClC7H7ClC7H7ClC7H7ClC2ClF3C 9 H 8O
C11H12O2
C9H10OC10H16O
C10H18O
C10H20OC12H22O2
C11H20O2
C14H26O2

10599-90-3

2
1.5
1
3
0.36
10
8
4
2.6
4
1.3
1
0.4
0.5
0.5
0.39
1
0.4
0.4
0.4
1
0.9
1
1.5
1.5
0.9

0.5
20
0.3
3.4
-

359-10-4

78-95-5
107-20-0
108-90-7
109-69-3
78-86-4
542-18-7
627-42-9

3188-13-4
126-99-8
109-09-1
2039-87-4
108-41-8
95-49-8
106-43-4
79-38-9
104-55-2
21040-45-9
104-54-1
5392-40-5
106-23-026489-01-0
150-84-5
105-85-1
97-89-2

12. Appendix

Gas name (displayed name)Coumarin
Creosote
Cresol, mCresol, oCresol, pCresyl acetate, pCresyl ethyl ether, pCresyl methyl ether
Crotonaldehyde
Crotonyl alcohol
CumeneCycloalkanes
Cyclobutanone
Cyclobutene
Cycloheptane
Cyclohex-2-enedione, 1,4Cyclohexane
Cyclohexanethiol
Cyclohexanol
Cyclohexanone
Cyclohexene
Cyclohexyl acetate
Cyclohexylamine
Cyclooctadiene
Cyclopentadiene
Cyclopentane
Cyclopentanone
Cyclopentene
Cyclopentene-1,3-dione, 4Cyclopropylamine
Cymene, pDecahydronaphthalene
Decanal12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaCoumarin
Creosotem-cresolo-cresolp-cresolp-cresyl acetatep-cresyl ethyl ether
p-cresyl methyl ether
Crotonaldehyde
Crotonyl alcohol
CumeneCycloalkanes
Cyclobutanone
Cyclobutene
Cycloheptane
2-cyclohexene-1,4-dione
Cyclohexane
Cyclohexanethiol
Cyclohexanol
Cyclohexanone
Cyclohexene
Cyclohexyl acetate
Cyclohexylamine
Cyclooctadiene
Cyclopentadiene
Cyclopentane
Cyclopentanone
Cyclopentene
4-cyclopentene-1,3-dione
Cyclopropylamine
p-cymene
Decahydronaphthalenen-decanal

C9H6O2

180/204

CAS number

C7H8O
C7H8O
C7H8O
C9H10O2
C9H12OC8H10O
C4 H 6O
C4 H 8O
C9H1291-64-58021-39-4
108-39-4
95-48-7
106-44-5
140-39-6
622-60-6
104-93-8
4170-30-3
6117-91-5
98-82-8

C4H6O
C4H6
C7H14
C6H6O2
C6H12
C6H12SC6H12OC6H10O
C6H10
C8H14O2
C6H13N
C8H12
C5H6
C5H10
C5H8O
C5H8
C5H4O2C3H7N
C10H14
C10H18
C10H20O

1191-95-3
822-35-5
291-64-5
4505-38-8
110-82-7
1569-69-3
108-93-0
108-94-1
110-83-8
622-45-7
108-91-829965-97-7
542-92-7
287-92-3
120-92-3
142-29-0
930-60-9765-30-0
99-87-6
91-17-8
112-31-2

Conversion
factor
(10.6 eV)
0.4
1.0
2.2
1.1
1.1
1
0.8
0.8
1
0.8
0.32
1.5
1.2
3
1.1
1
1.2
0.5
2.9
1.1
0.8
1.2
1
1
0.8
12.0
0.7
1.5
1
0.8
0.35
0.9
0.9

Conversion
factor
(10.0 eV)
1.5
1.5
1.5
3.3
2.7
1.20
1.4
0.9
1.0
140
1.7
-

12. Appendix

Gas name (displayed name)DecaneDecyne, 1Desfluorane
Diacetone alcohol
Diazine, 1,2Diazine, 1,3Dibromoacetylene
Dibromochloromethane
Dibromocyclohexane, 1,2Dibromocyclopentane
Dibromodichloromethane
Dibromoethane, 1,2Dibromoethene, 1,1Dibromoethene, 1,2Dibromomethane
Dichloro-1,1-difluoroethane, 1,2Dichloro-1,2-difluoroethane, 1,2Dichloro-1,2-difluoroethene, 1,2Dichloro-1-fluoroethane, 1,1Dichloro-1-fluoroethane, 1,2Dichloro-1-propene, 2,3Dichloro-2,2,-difluoroethene, 1,1Dichloroacetylene
Dichlorobenzene, oDichlorobenzene, pDichloroethane, 1,1Dichloroethane, 1,2Dichloroethene, 1,1Dichloroethene, 1,2Dichloroethene, cis-1,2Dichloroethene, trans-1,2Dichloromethane
Dichloromethylamine
Dichloropropane, 1,2-

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaNormal decane
1-decyne

C10H22
C10H18C3H2F6O
C6H12O2C4H4N2C4H4N2
C2Br2
CHBr2Cl
C6H10Br2C5H8Br2
CBr2Cl2
C2H4Br2
C2H2Br2
C2H2Br2
CH2Br2C2H2Cl2F2
C2H2Cl2F2
C2Cl2F2C2H3Cl2F
C2H3Cl2F
C3H4Cl2
C2Cl2F2
C2Cl2
C6H4Cl2
C6H4Cl2
C2H4Cl2
C2H4Cl2
C2H2Cl2
C2H2Cl2
C2H2Cl2
C2H2Cl2
CH2Cl2CH3Cl2N
C3H6Cl2

Diacetone alcohol
1,2-diazine
1,3-diazine
Dibromoacetylene
Dibromochloromethane
1,2-dibromocyclohexane
1,2-dibromocyclopentane
Dibromodichloromethane
Ethylene dibromide
1,1-dibromoethene
1,2-dibromoethene
Dibromomethane

1,2-dichloro-1,2-difluoroethene

2,3-dichloro-1-propene
1,1-dichloro-2,2-difluoroethene
Dichloroacetyleneo-dichlorobenzene
p-dichlorobenzene

1,1-dichloroethylene
1,2-dichloroethylene
cis-1,2-dichloroethenetrans-1,2-dichloroethene
DichloromethaneN,N-dichloro-N-methylamine

181/204

CAS number
124-18-5
764-93-2
123-42-2
289-80-5
289-95-2
624-61-3
124-48-1
5401-62-7
33547-17-0
594-18-3
106-93-4
593-92-0
540-49-8
74-95-3

598-88-9

78-88-6
79-35-67572-29-4
95-50-1
106-46-7

75-35-4
540-59-0
156-59-2
156-60-5
75-09-2
7651-91-4

Conversion
factor
(10.6 eV)
0.9
1.3
0.8
3
3
1.5
10
3
3
4
2
1.5
1.5
1.2
2
1.4
1
5
0.5
0.5
1
0.36
0.8
0.36
39
2
-

Conversion
factor
(10.0 eV)
4.2
0.83
0.84
0.5
0.5
0.29
-

12. Appendix

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (displayed name)

Gas name (alias)

Dicyclohexylamine
Dicyclopentadiene
Diesel fuelDiethoxyethane, 1,1Diethyl carbonate
Diethyl ether
Diethyl maleate
Diethyl malonate
Diethyl phthalate
Diethyl sulfate
Diethyl sulfide
Diethyl sulfone
Diethylacetylene
Diethylaminopropylamine, 3Diethylene glycol monoethyl ether
Diethylenetriamine
Diethylhydroxylamine
Diethylsilane
Diglycidyl ether
Dihydroeugenol
Dihydrojasmone
Dihydromyrcenol
Dihydroxybenzene, 1,2Dihydroxybenzene, 1,3Diiodomethane
Diisobutyl ketone
Diisobutylene
Diisopropyl ether
Diisopropylbenzene
Diketene
Dimethoxybenzene, 1,4Dimethoxyethane, 1,2Dimethoxymethane

Dicyclohexylamine
Dicyclopentadiene
Diesel fuelAcetalDiethyl carbonate
Diethyl ether
Maleic acid diethyl ester
Diethyl malonate
Diethyl phthalate
Diethyl sulfate
Diethyl sulfide
Diethyl sulfone
3-hexyne
3-diethylaminopropylamine
Diethylene glycol monoethyl ether
Diethylenetriamine
Diethylhydroxylamine
Diethylsilane
Diglycidyl ether
Dihydroeugenol
Dihydrojasmone
Dihydromyrcenol
Catechol
Resorcinol
Diiodomethane
Diisobutyl ketone
2,4,4-trimethyl-1-pentene
Isopropyl ether
Diisopropylbenzene
Diketenep-dimethoxybenzene
Ethylene glycol dimethyl ether
Dimethoxymethane

FormulaC12H23N
C10H12
C6H14O2
C5H10O3
C4H10OC8H12O4
C7H12O4
C12H14O4
C4H10SO4
C4H10S
C4H10O2S
C6H10
C7H18N2
C6H14O3
C4H13N3
C4H11NOC4H12Si
C6H10O3
C10H14O2
C11H18O
C10H20OC6H6O2C6H6O2
CH2I2
C9H18O
C8H16
C6H14OC12H18C4H4O2
C8H10O2
C4H10O2C3H8O2
182/204

CAS number
101-83-7
77-73-668334-30-5
105-57-7
105-58-8
60-29-7
141-05-9
105-53-3
84-66-2
64-67-5352-93-2
597-35-3
928-49-4
104-78-9
111-90-0
111-40-03710-84-7
542-91-6
2238-07-5
2785-87-7
1128-08-1
18479-58-8
120-80-9
108-46-3
75-11-6
108-83-8
107-39-1
108-20-3
25321-09-9
674-82-8
150-78-7
110-71-4
109-87-5

Conversion
factor
(10.6 eV)
0.8
0.9
0.8
0.9
1.5
0.9
2
4.0
1
3
0.6
2
2
1.2
0.6
0.9
2
2
3
0.4
0.6
0.8
1
1
1.2
0.8
0.6
0.7
0.4
2.2
1.3
1.2
1.4

Conversion
factor
(10.0 eV)
1.0
0.5
3
1.5
0.7
0.9
0.95
1.2
13

12. Appendix

Gas name (displayed name)
Dimethyl carbonate
Dimethyl disulfide
Dimethyl ether
Dimethyl phthalate
Dimethyl sulfate
Dimethyl sulfoxide
Dimethylacetamide N,NDimethylacetylene
Dimethylaminoethanol, 2Dimethylaniline, NNDimethylboron bromide
Dimethylbutyl acetate
Dimethylbutyl acetate, 1,3Dimethylcycloheptane, 1,2Dimethylcyclohexane,1,2Dimethylcyclopentane
Dimethylethylamine, NNDimethylformamide
Dimethylhydrazine, 1,1Dimethyloctan-1-ol, 3,7Dimethyloctan-3-ol, 3,7Dimethylpentane, 2,4Dimethylsilane
Dimethylthiophosphoryl chloride
Di-n-butylamine
Di-n-propylamine
Dioxane, 1,4Dioxolane
Dipentene
Diphenyl ether
Dipropyl ether
Dipropylene glycol
Disilane

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaDimethyl carbonate
Dimethyl disulfide
Dimethyl ether
Dimethyl phthalate

C3H6O3C2H6S2C2H6O
C10H10O4
C2H6O4S
C2H6OS
C4H9NO
C4H6
C4H11NO
C8H11NC2H6BBr
C8H16O2
C8H16O2
C9H18
C8H16
C7H14
C4H11NC3H7NOC2H8N2
C10H22O
C10H22O
C7H16
C2H8SiC2H6ClO2PS
C8H19N
C6H15NC4 H 8 O 2C3 H 6 O 2
C10H16
C12H10OC6H14OC6H14O3
Si2H6

Dimethyl sulfoxide
N,N-dimethylacetamide
2-butyne
N,N-dimethylethanolamine
N,N-dimethylaniline
Dimethylboron bromide
4-methyl-2-pentyl acetatetrans-1,2-dimethylcycloheptane
Dimethylcyclohexane
1α,2α-dimethylcyclopentane
N,N-dimethylethylamine
N.N-dimethylformamide
Dimethylhydrazine
3,7-dimethyloctan-1-ol
Tetrahydrolinalool
2,4-dimethylpentane
Dimethylsilane
Dimethylthiophosphoryl chloride
Dibutylamine
Di-n-propylamine
Dioxane1,3-dioxolane
d-limonene
Diphenyl ether
Dipropyl ether
Dipropylene glycol
Disilane
183/204

CAS number
616-38-6
624-92-0
115-10-6
131-11-3
67-68-5
127-19-5
503-17-3
108-01-0
121-69-7
5158-50-9
108-84-913151-50-3
583-57-3
1192-18-3
598-56-1
68-12-2
57-14-7
106-21-8
78-69-3
108-08-7
1111-74-6
2524-03-0
111-92-2
142-84-7
123-91-1
646-06-0
138-86-3
101-84-8
111-43-3
110-98-5
1590-87-0

Conversion
factor
(10.6 eV)
2.0
0.2
1.3
1
1
1.3
1
1.5
0.6
4
1.6
1.3
0.8
1.2
3
0.8
1
1.2
1.2
1.0
2
1
0.9
1
1.5
1.8
0.9
0.8
0.8
4
2

Conversion
factor
(10.0 eV)
32
0.5
0.9
1.7
1.1
4
1.5
1.7
4.5
0.8
1.7
-

12. Appendix

Gas name (displayed name)
Disulfur dibromide
Di-tert-butyl-p-cresol
Divinylbenzene
Divinylbenzene, 1,3Dodecene
Epichlorohydrin
Epoxypropyl isopropyl ether, 2,3Estragole
EthaneEthanol
Ethanolamine
Ethoxy-2-methylpropane, 1Ethoxy-2-propanol, 1Ethoxy-butane, 2Ethoxyethanol, 2Ethoxyethyl acetate, 2Ethyl 2,2,2-trifluoroethyl ether
Ethyl 2-methylbutyrate
Ethyl acetate
Ethyl acetoacetate
Ethyl acrylate
Ethyl benzoate
Ethyl butyrate
Ethyl chloroformate
Ethyl cyanoacrylate
Ethyl decanoate
Ethyl formate
Ethyl hexanoate
Ethyl hexanol, 2Ethyl hexyl acrylate, 2Ethyl iodide
Ethyl isopropyl ketone
Ethyl lactate

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaDisulfur dibromide
2,6-di-tert-butyl-p-cresol
Divinylbenzene
1,3-divinylbenzene
n-dodecane
Epichlorohydrin
Glycidyl isopropyl ether
4-allylanisole
Ethyl alcohol
Monoethanolamine
1-ethoxy-2-methylpropane
Propylene glycol monoethyl ether
2-ethoxy-butane
Ethylene grycol monoethyl ether
Ethylene glycol monoethyl ether acetate
Ethyl 2,2,2-trifluoroethyl ether
Ethyl DL-2-methylbutyrate
Ethyl acetate
Ethyl acetoacetate
Ethyl acrylate
Ethyl benzoate
Ethyl butyrate
Carbonochloridic acid ethyl ester
Ethyl 2-cyanoacrylate
Ethyl decanoate
Ethyl formate
Ethyl caproate
2-ethyl hexanol
2-ethyl hexyl acrylate
Ethyl iodide
2-methyl-3-pentanone
Ethyl lactate
184/204

Br2S2
C15H24O
C10H10
C10H10C12H26C3H5ClO
C6H12O2
C10H12O
C2H6
C2H6O
C2H7NOC6H14OC5H12O2
C6H14OC4H10O2
C6H12O3C4H7F3OC7H14O2
C4 H 8 O 2
C6H10O3C5H8O2
C9H10O2
C6H12O2C3H5O2Cl
C6H7O2N
C12H24O2
C3H6O2
C8H16O2
C8H18OC11H20O2
C2H5I
C6H12OC5H10O3CAS number
13172-31-1
128-37-0
1321-74-0
108-57-6
112-40-3
106-89-8
4016-14-2
140-67-0
64-17-5
141-43-5
627-02-1
1569-02-4
19316-73-5
110-80-5
111-15-9461-24-5
7452-79-1
141-78-6
141-97-9
140-88-5
93-89-0
105-54-4
541-41-3
7085-85-0
110-38-3
109-94-4
123-66-0
104-76-7
103-11-7
75-03-6565-69-5
97-64-3

Conversion
factor
(10.6 eV)
1.5
0.3
0.4
0.3
0.8
3.4
1.1
0.7
8.7
3
0.8
2
0.8
2
3
5
2
3.6
3
2
0.9
1
83
1.5
1.8
29.8
2.6
1.5
1
1.2
0.8
3

Conversion
factor
(10.0 eV)
0.4
0.25
30
1.1
5
1.8
40
15
3.3
3.3
0.30
5

12. Appendix

Gas name (displayed name)
Ethyl mercaptan
Ethyl methacrylate
Ethyl methyl carbonate
Ethyl morpholine, 4Ethyl octanoate
Ethyl perfluorobutyl ether
Ethyl phenyl acetate
Ethyl propanoate
Ethyl propionate
Ethyl tert-butyl ether
Ethyl-2-methyl benzene, 1Ethyl-3-ethoxypropionate
Ethylacetylene
Ethylamine
Ethylbenzene
Ethylcyclohexane
Ethylene
Ethylene carbonate
Ethylene cyanohydrin
Ethylene glycol
Ethylene glycol diacetate
Ethylene glycol monopropyl ether
Ethylene oxide
Ethylenediamine
Ethyleneimine
Ethylhexanal, 2Ethylhexanoic acid, 2Ethylhexenal, 2Eucalyptol
Eugenol
Eugenol methyl ether
Fenchol
Ferrocene
Fluoro-2-propanone, 1-12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaEthyl mercaptan
Ethyl methacrylate
Ethyl methyl carbonate
N-ethyl morpholine
Ethyl caprylate

C2H6S
C6H10O2
C4 H 8O 3
C6H13NO
C10H20O2
C6H5F9O
C10H12O2
C5H10O2
C5H10O2
C6H14O
C9H12
C7H14O3
C4H6
C2H7N
C8H10
C8H16
C2H4
C 3 H 4O 3
C3H5NOC2H6O2
C6H10O4
C5H12O2
C2H4O
C2H8N2C2 H 5 N
C8H16OC8H16O2
C8H14OC10H18O
C10H12O2
C11H14O2
C10H18O
C10H10Fe
C3H5FO

Ethyl phenyl acetate
Ethyl propanoate
Ethyl tert-butyl ether
2-ethyltoluene
Ethyl-3-ethoxypropionate
Ethylacetylene
Monoethylamine
Ethyl benzene
Ethylcyclohexane
Ethylene
Ethylene carbonate
Ethylene glycol
Ethylene glycol diacetate
2-propoxyethanol
Ethylene oxide
Ethylenediamine
Ethyleneimine
2-ethylhexanal
2-ethylhexanoic acid2-ethyl hexanol
1,8-cineole
Eugenol
Eugenol methyl ether
Fenchyl alcohol
Ferrocene

185/204

CAS number
75-08-1
97-63-2
623-53-0
100-74-3
106-32-1
101-97-3
105-37-3
637-92-3
611-14-3
763-69-9
107-00-6
75-04-7
100-41-4
1678-91-7
74-85-1
96-49-1
107-21-1
111-55-7
2807-30-9
75-21-8
107-15-3
151-56-4
123-05-7
149-57-5
645-62-5
470-82-6
97-53-0
93-15-2
1632-73-1
102-54-5

Conversion
factor
(10.6 eV)
0.56
1.5
1.5
0.6
2.3
1.2
2
0.6
0.45
3
3
1
0.5
1
8
3
20
4
3
15
0.8
2
1.5
2.0
1.3
0.6
0.4
0.4
0.4
0.8
-

Conversion
factor
(10.0 eV)
0.55
1.6
6
0.5
0.6
1.3
9
10
16
-

12. Appendix

Gas name (displayed name)
Fluorobenzene
Fluorobenzoic acid, 4Formamide
Formaldehyde
Formic acid
Furan
FurfuralFurfuryl alcohol
Furfuryl mercaptan
Gasoline
Geranial
Geraniol
Geranyl acetate
GermaneGlutaraldehyde
GlycidolGlycidyl methacrylate
Glycolaldehyde
GlyoxalGuaiacolHalothane
Heptan-2-one
Heptan-3-one
HeptaneHeptanol
Heptene, 1Heptylcyclopentan-1-one, 2Heptyne, 1Hex-1-en-3-ol
Hexachlorodisilane
Hexachloroethane
Hexafluoropropylene
Hexamethyldisilazane, 1,1,1,3,3,3-.
Hexamethyldisiloxane

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaFluorobenzene
4-fluorobenzoic acid
Formamide

C6 H 5 F
C7H5FO2
CH3ON
CH2O
CH2O2
C4H4O
C 5 H 4O 2
C5 H 6O 2
C5H6OS

Furan
FurfuralFurfuryl alcohol
Furfuryl mercaptan
Gasoline
Geranial
Geraniol
Geranyl acetate
GermaneGlutaraldehyde

C10H16O
C10H18OC12H20O2
GeH4
C5H8O2C3H6O2
C7H10O3C2H4O2C2H2O2C7H8O2
CF3CHBrCl
C7H14OC7H14O
C7H16
C7H16O
C7H14
C12H22O
C7H12
C6H12O
Cl6Si2C2Cl6
C3F6
C6H19NSi2
C6H18OSi2

Glycidyl methacrylate
Hydroxyacetaldehyde
GlyoxalGuaiacolMethyl amyl ketone
3-heptanone
Normal heptane
Heptanol
1-heptene
2-heptylcyclopentanone
1-heptyne
1-hexen-3-ol
Hexachlorodisilane

Hexamethyldisilazane
Hexamethyldisiloxane
186/204

CAS number
462-06-6
456-22-4
75-12-7

110-00-9
98-01-1
98-00-0
98-02-2
8006-61-9
141-27-5
106-24-1
105-87-3
7782-65-2
111-30-8
106-91-2
141-46-8
107-22-2
90-05-1
110-43-0
106-35-4
142-82-553535-33-4
592-76-7
137-03-1
628-71-7
4798-44-1
13465-77-5

999-97-3
107-46-0

Conversion
factor
(10.6 eV)
0.8
2
2
0.4
0.82
2
0.5
0.8
0.6
0.7
1.2
10
0.9
1.2
5.0
1
0.8
0.7
0.8
1.6
1.7
0.9
0.8
2
0.9
8
1
0.3

Conversion
factor
(10.0 eV)
0.83
1
0.97
0.81
11
1.1
-

12. Appendix

Gas name (displayed name)
Hexamethylene diisocyanate
Hexan-2-one
HexaneHexanoic acid
Hexanol
Hexene, 1Hexenyl acetate, cis-3Hexenyl butyrate, cis-3Hexylaldehyde
Hydrazine
Hydrogen iodide
Hydrogen selenide
Hydrogen sulfide
Hydrogen telluride
Hydroxybutanal, 3Hydroxycitronellal
Hydroxyethyl acrylate
Hydroxylamine
Hydroxypropyl acrylate, 2Indene
IndoleIodineIodobenzene
Iodoethene
Iodoform
Iodomethane
Isoalkanes, C10-C13
Isoamyl acetate
Isoamyl salicilate
Isoamylene
Isobornyl acetate
Isobutane
Isobutanol

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaHexamethylene diisocyanate
Methyl n-butyl ketone
Normal hexane
n-Caproic acid
Normal hexyl alcohol
1-hexenecis-3-hexenyl acetate
cis-3-hexenyl butyrate
Hexylaldehyde
Hydrazine
Hydrogen iodide
Hydrogen selenide
Hydrogen sulfide
Hydrogen telluride
3-hydroxybutanal
Hydroxycitronellal
2-hydroxyethyl acrylate
Hydroxylamine
2-hydroxypropyl acrylate
IndeneIndoleIodineIodobenzene
Iodoethene
Iodoform
Methyl iodide
Isoalkanes (C10-C13)
Isoamyl acetate
Isoamyl salicilate
Isoamylene
Isobornyl acetate
Isobutane
Isobutyl alcohol

C8H12N2O2
C6H12O
C6H14
C6H12O2
C6H14O
C6H12
C8H14O2
C10H18O2
C6H12O
H4 N 2
HI
H2Se
H2S
H2Te
C4H8O2
C10H20O2
C5H8O3
H3NO
C6H10O3
C9H8
C8H7N
I2
C6 H 5 I
C2 H 3 I
CHI3CH3I
C7H14O2
C12H16O3
C5H10
C12H20O2
C4H10
C4H10O
187/204

CAS number
822-06-0
591-78-6
110-54-3
142-62-1
111-27-3
592-41-6
3681-71-8
16491-36-4
66-25-1
302-01-2
10034-85-2
7783-07-5
7783-06-4
7783-09-7
107-89-1
107-75-5
818-61-1
7803-49-8
999-61-1
95-13-6
120-72-97553-56-2
591-50-4
593-66-8
75-47-8
74-88-4
68551-17-7
123-92-2
87-20-7
513-35-9
125-12-2
75-28-5
78-83-1

Conversion
factor
(10.6 eV)
1.5
0.8
2.6
3
2
0.9
1.5
1.5
0.6
3
5
2
4
1.5
2.0
1
1.2
2
1.5
0.5
0.4
0.2
0.2
1.2
1.5
0.4
1
1.6
1
1
0.4
8
3.5

Conversion
factor
(10.0 eV)
0.7
13
7
1.1
1.2
1.8
0.4
0.1
6
0.86
13

12. Appendix

Gas name (displayed name)
Isobutyl acetate
Isobutyl acrylate
Isobutylbenzene
Isobutylene
Isobutylene epoxide
Isobutyraldehyde
Isobutyric acid
Isodecanol
Isoeugenol
Isoflurane
Isoheptane
Isojasmone
Isomenthone
Isononanal
Isononanol
Isooctane
Isooctanol
Isopentane
Isopentene
Isopentanol
Isophorone
Isophorone diisocyanate
Isoprene
Isopropanol
Isopropanolamine
Isopropoxyethanol, 2Isopropyl acetate
Isopropyl chloroformate
Isopropyl mercaptan
Isopropyl nitrite
Isopropylamine
Isopropylaminoethanol, 2Isopropylcyclohexane12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaIsobutyl acetate
Isobutyl acrylate
Isobutylbenzene
Isobutylene
Isobutylene oxide
Isobutyraldehyde
Isobutyric acid
Isodecyl alcohol
Isoeugenol

C6H12O2
C7H12O2
C10H14
C4H8
C4H8O
C4H8O
C 4 H 8O 2
C10H22O
C10H12O2
C3H2ClF5O
C7H16
C11H18O
C10H18O
C9H18O
C9H20O
C8H18
C8H18O
C5H12
C5H10
C5H12OC9H14OC12H18N2O2
C5H8
C3H8O
C3H9NOC5H12O2
C5H10O2C4H7O2Cl
C3H8S
C3H7NO2
C3H9N
C5H13NO
C9H18

2-methylhexane
Dihydro isojasmone(+/-)-Isomenthone
3,5,5-trimethylhexanaldehyde
3,5,5-trimethyl-1-hexanol
2,3,4-trimethylpentane
Isooctanol
Isopentane
2-methyl-1-butene
Isophorone
Isophorone diisocyanate
Isoprene
Isopropyl alcohol
Monoisopropanolamine
Ethylene glycol monoisopropyl ether
Isopropyl acetate
Isopropyl chloroformate
2-propanethiol
Isopropyl nitrite
Isopropylamine
2-isopropylaminoethanol
Isopropylcyclohexane
188/204

CAS number
110-19-0
106-63-8
538-93-2
115-11-7
558-30-5
78-84-2
79-31-225339-17-7
97-54-1
591-76-4
95-41-01196-31-2
5435-64-3
3452-97-9
565-75-3
26952-21-6
78-78-4
563-46-2
78-59-1
4098-71-9
78-79-5
67-63-0
78-96-6
109-59-1
108-21-4
108-23-6
75-33-2
541-42-4
75-31-0
109-56-8
696-29-7

Conversion
factor
(10.6 eV)
2.3
1.3
0.4
1
3
1.2
4
0.9
0.4
1.2
0.7
0.6
9.0
1.5
0.74
1.7
4.0
0.8
0.8
0.6
0.8
4.4
1.5
1.5
2.2
1.6
0.56
4
1.2
2
0.9

Conversion
factor
(10.0 eV)
10
5
0.4
1
15
1.4
3.2
1.0
25
1.5
8
1
1.1

12. Appendix

Gas name (displayed name)
Isothiazole
Isovaleraldehyde
Isovaleric acid
Isoxazole
JasmalJasmone, cisJet Fuel JP-4
Jet Fuel JP-5
Jet Fuel JP-8
Kerosene
KeteneLinalool oxide
Linalyl acetate
Maleic anhydride
MethanolMentholMenthone
Mercaptoacetic acid
Metaldehyde
Methacrylamide
Methacrylic acid
Methacrylonitrile
Methanol
Methoxy-1-butanol, 3Methoxy-1-propanol, 2Methoxy-2,2-dimethylpropane
Methoxybutyl acetate, 3Methoxyethane
Methoxyethanol, 2Methoxyethene
Methoxyethoxyethanol, 2Methoxyethyl acetate
Methoxyethyl acetate, 2Methoxyethyl ether, 2-

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaIsothiazole
Isovaleraldehyde
Isovaleric acid
Isoxazole
1,3-nonanediol acetate
cis-Jasmone
JP-4
JP-5
JP-8
Kerosene
Ketene2,2,6-trimethyl-6-vinyltetrahydropyran-3-ol
Linalyl acetate
Maleic anhydride
MentholMenthone
Thioglycolic acid
Metaldehyde
Methacrylamide
Methacrylic acid
Methacrylonitrile
Methyl alcohol
3-methoxy-1-butanol
2-methoxy-1-propanol
Methoxy-2,2-dimethylpropane
Methoxybutyl acetate
Ethyl methyl ether
Ethylene glycol monomethyl ether
Methyl vinyl ether
Diethylene glycol monomethyl ether
Ethylene glycol monoethyl ether acetate
Diethylene glycol dimethyl ether
189/204

C3H3NS
C5H10OC5H10O2C3H3NOC11H22O3
C11H16O

C2H2O
C10H18O2
C12H20O2
C 4 H 2O 3
CH4O
C10H20OC10H18O
C2H4O2S
C8H16O4C4H7NOC4H6O2
C4H5N
CH4O
C5H12O2
C4H10O2
C6H14OC7H14O3C3H8O
C3H8O2C3H6O
C5H12O3
C5H10O3
C5H10O3
C6H14O3CAS number
288-16-4
590-86-3
503-74-2
288-14-2
1322-17-4
488-10-8

8008-20-6
463-51-4
14049-11-7
115-95-7
108-31-6
1490-04-6
89-80-5
68-11-1
108-62-3
79-39-0
79-41-4
126-98-7
67-56-1
2517-43-3
1589-47-5
1118-00-94435-53-4
540-67-0
109-86-4
107-25-5
111-77-3
110-49-6
111-96-6

Conversion
factor
(10.6 eV)
3
1.3
3.0
6
1.4
0.5
0.8
0.7
0.7
0.8
3
0.6
0.9
2
0.5
0.4
1
2.0
2.0
2.3
5
200
3
2
0.7
2
1.0
2.7
1
1.4
2.7
0.8

Conversion
factor
(10.0 eV)
1.5
25
0.7
0.6
0.6
0.7
-

12. Appendix

Gas name (displayed name)Methoxymethylethoxy-2-propanol
Methoxypropan-2-ol, 1Methoxypropane, 2Methoxypropyl acetate
Methyl 2-methylpropanoate
Methyl acetate
Methyl acetoacetate
Methyl acrylate
Methyl anthranilate
Methyl benzoate
Methyl bromide
Methyl cyanoacrylate
Methyl dimethylacrylate
Methyl ethyl ketone
Methyl ethyl ketone peroxides
Methyl heptyne carbonate
Methyl ionone
Methyl isobutyl ketone
Methyl isocyanate
Methyl isopropyl ketone
Methyl isothiocyanate
Methyl mercaptan
Methyl methacrylate
Methyl perfluorobutyl ether
Methyl phenyl acetate
Methyl propargyl ether
Methyl propionate
Methyl propynoate
Methyl salicylate
Methyl sulfide
Methyl tert-butyl ether
Methyl thiocyanate
Methyl thioglyconate

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaDipropylene glycol methyl ether
Propyleneglycol monomethy lether
2-methoxypropane
Prolylene glycol monomethyl ether acetate
Methyl isobutyrate
Methyl acetate
Methyl acetoacetate
Methyl acrylate
Methyl anthranilate
Methyl benzoate
Methyl bromide
Methyl 3,3-dimethylacrylate
Methyl ethyl ketone
Methyl ethyl ketone peroxides
Methyl-2-octinoat
Methyl ionone
Methyl isobutyl ketone
Methyl isocyanate
Methyl isopropyl ketone
Methyl isothiocyanate
Methyl mercaptan
Methyl methacrylate
Methyl phenyl acetate
Methyl propargyl ether
Methyl propionate
Methyl propynoate
Methyl salicylate
Dimethyl sulfide
Methyl tert-butyl ether
Methyl thiocyanate
Methyl thioglyconate
190/204

C7H16O3
C4H10O2
C4H10OC6H12O3
C5H10O2C3H6O2C5H8O3C4H6O2C8H9NO2
C8 H 8 O 2
CH3Br
C5H5O2N
C6H10O2
C4H8O
C8H18O6
C9H14O2
C14H22OC6H12OC2H3NOC5H10OC2H3NSCH4S
C5H8O2C5H3F9O
C9H10O2
C4H6O
C4H8O2C4H4O2C8H8O3C2H6S
C5H12OC2H3NSC3H6O2S

CAS number
34590-94-8
107-98-2
598-53-8
108-65-6
547-63-7
79-20-9
105-45-3
96-33-3
134-20-3
93-58-3
74-83-9924-50-5
78-93-3
1338-23-4
111-12-6
1335-46-2
108-10-1
624-83-9
563-80-4
556-61-6
74-93-1
80-62-6
101-41-7
627-41-8
554-12-1
922-67-8
119-36-8
75-18-3
1634-04-4
556-64-92365-48-2

Conversion
factor
(10.6 eV)
1.3
2
0.9
1.2
2
5.2
3
3.4
0.4
1.2
1.9
2.5
0.8
0.8
1.3
0.4
0.8
5
0.8
0.6
0.7
1.6
0.4
2
1.5
10
0.8
0.5
0.8
2
1

Conversion
factor
(10.0 eV)
2.7
2.1
80
2
1.01
0.96
0.6
2.1
36
0.7
1.02
-

12. Appendix

Gas name (displayed name)Methyl undecanal, 2Methyl vinyl ketone
Methyl-1-butene, 3Methyl-2-butanol, 3Methyl-2-hexenoic acid, trans-3Methyl-2-propen-1-ol, 2Methyl-2-pyrrolidinone, NMethyl-5-hepten-2-one, 6Methylamine
Methylbutan-1-ol, 3Methylbutanal, 2Methylbutanol
Methylbutyric acid, 2Methylchloroformate
Methylcyclohexane
Methylcyclohexanol
Methylcyclohexanol, 4Methylcyclohexanone, 2Methylcyclopentane
Methylenepentane, 3Methylheptan-3-one, 5Methylhexan-2-one, 5Methylhydrazine
Methylpent-3-en-2-one, 4Methylpentan-2-ol, 4Methylpentane, 2Methylpentane, 3Methylpentane-2,4-diol, 2Methylpropanoyl chloride, 2Methylpyrrole, NMethylstyrene
Methylthiopropional, 3Mineral oil

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

Formula2-methyl undecanal
Methyl vinyl ketone
3-methyl-1-butene
3-methyl-2-butanoltrans-3-methyl-2-hexenoic acid
β-Methallyl alcohol
N-methyl-2-pyrrolidinone
6-methyl-5-hepten-2-one
Monomethylamine
Isoamyl alcohol
2-methylbutyraldehyde
2-methylbutanol
DL-2-methylbutyric acid

C12H24O
C4H6O
C5H10
C5H12OC7H12O2
C4H8O
C5H9NOC8H14O
CH5N
C5H12OC5H10OC5H12OC5H10O2C2H3O2Cl
C7H14
C7H14OC7H14OC7H12O
C6H12
C6H12
C8H16OC7H14O
CH6N2
C6H10OC6H14O
C6H14
C6H14
C6H14O2C4H7ClO
C5 H 7 N
C9H10
C4H8OS

Methylcyclohexane
Methylcyclohexanol
4-methylcyclohexanol
2-methylcyclohexanone
Methylcyclopentane
2-ethyl-1-butene
5-methylheptan-3-one
Methyl isoamyl ketone
Monomethylhydrazine
Mesityl oxide
4-methylpentan-2-ol
2-methylpentane
3-methylpentane
2-methylpentane-2,4-diol
Isobutyrylchlorid
1-methylpyrrole
Vinyltoluene
3-methylthiopropional
Mineral oil
191/204

CAS number
110-41-8
78-94-4
563-45-1
598-75-4
27960-21-0
513-42-8
872-50-4
110-93-0
74-89-5
123-51-3
96-17-3
137-32-6
116-53-0
108-87-2
25639-42-3
589-91-3
583-60-8
96-37-7760-21-4
541-85-5
110-12-3
60-34-4
141-79-7
108-11-2
107-83-5
96-14-0
107-41-5
79-30-1
96-54-8
25013-15-4
3268-49-3
8042-47-5

Conversion
factor
(10.6 eV)
1.1
0.6
0.8
3.3
1.5
1.1
0.9
0.8
1.4
3
1.5
1.5
3.5
1.1
2.4
2.4
1
1.5
0.8
0.8
0.8
1.3
0.7
2.8
1.5
1.5
4
6
0.5
0.5
2
0.8

Conversion
factor
(10.0 eV)
1.6
0.76
10
1.3
20
1
0.88
0.91
0.66
3
34
24
0.8
0.5
0.7

12. Appendix

Gas name (displayed name)Mineral spirits
Monoisobutanolamine
Morpholine
MyrceneNaphtha, hydrotreated heavy
Naphthalene
Naphthol methyl ether, 2Neopentane
Neopentyl alcohol
Nitric oxide
Nitrobenzene
Nitroethane
Nitrogen dioxide
Nitromethane
Nitropropane, 2N-Methylolacrylamide
NonaneNonanol (mixed isomers)
Nonene (mixed isomers)
Nonene, 1Norbornadiene, 2,5Octamethyltrisiloxane
OctaneOctanol (mixed isomers)
Octene (mixed isomers)
Octene, 1Oxalyl bromide
Oxydiethanol, 2,2Paraffin wax, fume
Paraffins, normal
Paraldehyde
Pentacarbonyl iron
Pentan-2-one
Pentan-3-one

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaMineral spirits
2-amino-2-methyl-1-propanol
Morpholine
MyrceneHydrotreated heavy naphtha
Naphthalene
β-naphthyl methyl ether
Neopentane
2,2-dimethyl-1-propanol
Nitrogen monoxide
Nitrobenzene

C4H11NOC4H9NOC10H16
CnH(2n+2)
C10H8
C11H10O
C5H12
C5H12ONO
C6H5NO2C2H5NO2
NO2
CH3NO2C3H7NO2C4H7NO2
C9H20
C9H20O
C9H18
C9H18
C7H8
C8H24O2Si3
C8H18
C8H18O
C8H16
C8H16
C2Br2O2
C4H10O3

Nitrogen dioxide

N-(hydroxymethyl)acrylamide
Nonanen-nonanol
Nonene1-nonene
Bicyclo[2.2.1]hepta-2,5-diene
Octamethyltrisiloxane
Normal octane
1-octanol
Octene1-octene
Oxalyl bromide
Diethylene glycol
Paraffin wax
Normal paraffins
Paraldehyde
Pentacarbonyl iron
2-pentanone
Diethyl ketone

C6H12O3FeC5O5C5H10OC5H10O
192/204

CAS number
64475-85-0
124-68-5
110-91-8
123-35-3
64742-48-9
91-20-3
93-04-9463-82-1
75-84-3
10102-43-9
98-95-3
10102-44-0

924-42-5
111-84-2
143-08-827215-95-8
124-11-8
121-46-0
107-51-7
111-65-9
111-87-525377-83-7
111-66-0
15219-34-8
111-46-6
8002-74-2
64771-72-8
123-63-7
13463-40-6
107-87-9
96-22-0

Conversion
factor
(10.6 eV)
0.8
1.6
2
0.5
1.0
0.4
0.5
3.0
2.0
8
1.7
10
2.0
1.3
1.2
0.8
0.55
0.6
0.3
1.3
1.5
0.9
0.58
5
2.0
1
1
2.0
1
0.8
0.8

Conversion
factor
(10.0 eV)
0.7
2
0.4
4.7
0.70
7
1.1
4.8
1.03
0.75

12. Appendix

Gas name (displayed name)Pentanal
Pentandione, 2,4Pentane
Pentanoic acidPentanol, 2Pentanol, 3Pentene, 1Pentylcyclopentan-1-one, 2Pentylcyclopentane
Pentyne, 1Peracetic acid
Perfluorobutadiene
Perfluoro-tert-butylamine
Petroleum ether
Phellandrene
Phenethyl methyl ether, 2Phenol
Phenoxyethanol, 2Phenyl chloroformate
Phenyl ethyl isobutyrate, 2Phenyl propene, 2Phenyl-2,3-epoxypropyl ether
Phenylacetaldehyde
Phenylacetic acidPhenylcyclohexane
Phenylethyl acetate, 1Phenylethyl alcohol, 2Phosphine
Picoline, 3Pine oil
Pinene, αPinene, βPiperazine

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

FormulaPentanal
2,4-pentandione
Normal pentane
Pentanoic acid
2-pentanol
3-pentanol
1-pentene
2-pentylcyclopentan-1-one
Pentylcyclopentane
1-pentyne
Peracetic acid
Hexafluoro-1,3-butadiene
Perfluoro-tert-butylamine
Petroleum ether
p-mentha-1,5-diene2-phenethyl methyl ether
Phenol2-phenoxyethanol
Phenyl chloroformate
2-phenyl ethyl isobutyrate
α-methylstyrene
Glycidyl phenyl ether
Phenylacetaldehyde
Phenylacetic acidPhenylcyclohexane
1-phenylethyl acetate
β-phenyl ethyl alcohol
Phosphine
β-picoline
Pine oil
α-pinene
β-pinene
Piperazine anhydrous

C5H10O
C5 H 8O 2
C5H12
C5H10O2
C5H12OC5H12O
C5H10
C10H18O
C10H20
C5H8
C2H4O3
C4F6
C4H2F9N
C10H16
C9H12O
C6H6O
C8H10O2C7H5ClO2
C12H16O2
C9H10
C9H10O2
C8H8O
C8H8O2
C12H16
C10H12O2
C8H10O
PH3
C6H7N
C10H16
C10H16
C4H10N2
193/204

CAS number
110-62-3
123-54-6
109-66-0
109-52-4
6032-29-7
584-02-1
109-67-1
4819-67-4
3741-00-2
627-19-0
79-21-0685-63-2
2809-92-9
8032-32-4
99-83-23558-60-9
108-95-2
122-99-6
1885-14-9
103-48-0
98-83-9
122-60-1
122-78-1
103-82-2
827-52-1
93-92-5
60-12-87803-51-2
108-99-6
8002-09-3
80-56-8
127-91-3
110-85-0

Conversion
factor
(10.6 eV)
1.2
0.8
5
4
1.5
1.5
1.3
1
1.1
3
2
3
5
0.9
0.8
0.6
1.2
0.5
1.1
1.5
0.4
0.8
0.7
1
0.4
0.7
1.2
2
0.9
1
0.27
0.27
0.8

Conversion
factor
(10.0 eV)
1.75
0.85
52
16
3.5
1.00
1.1
10
0.4
0.8
0.48
0.59
-

12. Appendix

Gas name (displayed name)
Piperidine
Piperylene
Prop-2-yn-1-ol
Propadiene
Propan-1-ol
Propanamide
PropanePropane-1,2-diol
Propanolamine
Propargyl chloride
Propen-1-imine, 2Propene
Propiolic acid
Propionaldehyde
Propionic acid
Propionitrile
Propoxy-2-propanol, 1Propyl acetate, nPropyl benzene
Propyl benzene, 2Propyl butanoate
Propyl formate
Propyl iodide
Propylamine, n-12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

105-66-8
110-74-7
107-08-4
107-10-8

Conversion
factor
(10.6 eV)
0.9
0.7
2.9
1
4.8
2
3
1.5
2
2
1.4
8
1.7
8
1.1
2.5
0.5
2.3
10
1
1

Conversion
factor
(10.0 eV)
0.8
1.0
40
2
1.6
17
0.55
2.7
-

C9H12

74296-31-4

0.45

-

C4H6O3
C7H14O3C3H6O
C3H7N
C3H7NO3C3H4
C4H4N2
C5H5N

108-32-7
98516-30-4
75-56-975-55-8

2
1.2
2.7
1.3
4
3
0.8

0.87

FormulaPiperidine
1,3-pentadiene
2-propyn-1-ol
Propadiene
Normal propyl alcohol
Propanamide
Propylene glycol
3-amino-1-propanol
Propargyl chloride
2-propen-1-imine
Propylene
Propiolic acid
Propionaldehyde
Propionic acid
Propylene glycol monopropyl ether
n-propyl acetate
1-phenylpropan

Propyl butanoate
Propyl formate
Propyl iodide
Normal propylamine
Propylbenzene
Propylbenzene (all isomers)(all isomers)
Propylene carbonate
Propylene carbonate
Propylene glycol ethyl ether acetate Propylene glycol monoethyl ether acetate
Propylene oxide
Propylene oxide
Propyleneimine
Propyleneimine
Propylnitrate, nPropyne
Methylacetylene
Pyrazine
Pyrazine
Pyridine
Pyridine
194/204

C5H11NC5 H 8
C3H4O
C3H4
C3H8O
C3H7NO
C3H8
C3 H 8 O 2
C3H9NOC3H3ClC3H5N
C3H6C3H2O2C3H6O
C3H6O2C3H5NOC6H14O2
C5H10O2C9H12C9H12C7H14O2C4H8O2C3H7I
C3 H 9 N

CAS number
110-89-4
504-60-9
107-19-7
463-49-0
71-23-8
79-05-0
57-55-6
156-87-6
624-65-7
73311-40-7
115-07-1
471-25-0
123-38-6
79-09-4
1569-01-3
109-60-4
103-65-1

74-99-7
290-37-9
110-86-1

12. Appendix

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (displayed name)

Gas name (alias)

FormulaPyridinol, 4Pyridylamine, 2Pyrrole
Pyrrolidine
Pyruvaldehyde
Rose oxide, cisSec-amyl acetate
Sevoflurane
StibineStyreneSulfur dioxide
Terpineol, αTerpinolene
Terpinyl acetate, αTert-amyl methyl ether
Tert-butanol
Tert-butyl bromide
Tert-butyl formate
Tetrachloroethane, 1,1,1,2Tetrachloroethane, 1,1,2,2Tetrabromoethane, 1,1,2,2Tetracarbonylnickel
Tetrachloroethylene
Tetrachloropyridine, 2,3,5,6Tetraethyl orthosilicate
Tetraethyllead
Tetrafluoroethylene
Tetrahydrofuran
Tetrahydronaphthalene
Tetrahydropyran
Tetrahydrothiophene
Tetramethyl orthosilicate
Tetramethyl succinonitrile
Tetramethylbenzene (all isomers)

4-hydroxypyridine
2-aminopyridine
PyrrolePyrrolidine
Methylglyoxal
4-methyl-2-(2-methyl-1-propenyl)tetrahydropyran
sec-amyl acetate
StibineStyreneα-terpineol
Terpinolene
Terpinyl acetate
2-methyl-2-methoxybutane
tert-butyl alcohol
2-bromo-2-methylpropane
tert-butyl formate

1,1,2,2-tetrabromoethane
Nickel carbonyl
Perchloroethylene
2,3,5,6-tetrachloropyridine
Tetraethoxysilane
Tetrafluoroethylene
Tetrahydrofuran
Tetrahydronaphthalene
Tetrahydropyran
Tetrahydrothiophene
Tetramethoxysilane
Tetramethyl succinonitrile
1,2,4,5-tetramethylbenzene
195/204

C5H5NOC5H6N2C4H5N
C4H9N
C3H4O2
C10H18O
C7H14O2C3H3F7O
SbH3
C8H8
SO2
C10H18O
C10H16
C12H20O2
C6H14OC4H10OC4H9Br
C5H10O2C2H2Cl4
C2H2Cl4
C2H2Br4
NiC4O4
C2Cl4
C5HCl4N
C8H20O4Si
C8H20Pb
C2F4
C4H8O
C10H12
C5H10O
C4H8S
C4H12O4Si
C8H12N2
C10H1479-27-6
13463-39-3
127-18-4
2402-79-1
78-10-4

Conversion
factor
(10.6 eV)
3
0.8
0.6
0.4
0.7
0.8
2
1.5
0.35
0.8
0.59
1.2
0.8
2.6
1.5
8
2
1
0.44
1
2

Conversion
factor
(10.0 eV)
20
0.52
0.9
2.8
1.6
0.33
3

116-14-3
109-99-9
119-64-2
142-68-7
110-01-0
681-84-5
3333-52-6
95-93-2

15
0.8
0.4
3
0.6
2.0
1
0.3

0.5
-

CAS number
626-64-2
504-29-0
109-97-7
123-75-1
78-98-8
16409-43-1
626-38-0
7803-52-3
100-42-5
98-55-5
586-62-9
80-26-2
994-05-8
75-65-0507-19-7
762-75-4

12. Appendix

Gas name (displayed name)
Tetramethylbutane, 2,2,3,3Tetramethylgermane
Tetramethylguanidine, N,N,N',N'
Tetramethylsilane
Thioacetic acidThiocarbonyl fluoride
Thiocyanogen
Thioformaldehyde trimer
Thiophene
Thiophosgene
ThymolTitanium-n-propoxide
TolueneToluene-2,4-diisocyanate
Toluenesulfonyl chloride, pToluidine, oTolylaldehyde, pTriazine, 1,3,5Tributyl phosphate
Tributylamine
Trichlorobenzene, 1,2,4Trichloro-2-fluoroethane, 1,1,2Trichloroethane, 1,1,1Trichloroethane, 1,1,2Trichloroethylene
Trichloropropane 1,2,3Trichlorotrifluoroethane, 1,1,1Trichlorotrifluoroethane, 1,1,2Triethyl phosphate
Triethyl silane
Triethylamine
Triethylbenzene
Triethylene aluminum
Trifluoroethane, 1,1,2-

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

Formula2,2,3,3-tetramethylbutane
Tetramethylgermane
1,1,3,3-tetramethylguanidine
Tetramethylsilane
Thioacetic acid
Difluoromethanethione
Thiocyanogen1,3,5-trithiane
Thiophene
Thiophosgene
ThymolTitanium (IV) propoxide
TolueneToluene-2,4-diisocyanate
p-toluenesulfonyl chloride
o-toluidine
p-tolylaldehyde
1,3,5-triazine
Tributyl phosphate
Tributylamine
1,2,4-trichlorobenzene

C8H18
C4H12Ge
C5H13N3
C4H12SiC2H4OSCSF2
C2S2N2C3H6S3C4 H 4 S
CSCl2
C10H14O
C12H28O4Ti
C7H8
C9H6N2O2
C7H7SO2Cl
C7 H 9 N
C8 H 8 O
C3H3N3
C12H27O4P
C12H27N
C6H3Cl3
C2H2Cl3F
C2H3Cl3
C2H3Cl3
C2HCl3C3H5Cl3
C2Cl3F3
C2Cl3F3
C6H15O4P
C6H16Si
C6H15NC12H18
C6H15AlC2H3F3Trichloroethylene

Triethyl phosphate
Triethyl silane
Triethylamine
Triethylbenzene
Triethylene aluminum

196/204

CAS number
594-82-1
865-52-1
80-70-6
75-76-3
507-09-5
420-32-6
505-14-6
291-21-4
110-02-1
463-71-8
89-83-83087-37-4
108-88-3
584-84-9
98-59-995-53-4
104-87-0
290-87-9
126-73-8
102-82-9
120-82-1

79-01-6

78-40-0
617-86-7
121-44-8
25340-18-5
97-93-8

Conversion
factor
(10.6 eV)
1
2
0.6
2
2
6
8
1.5
0.4
1
0.7
3
0.5
1.6
3
0.5
0.8
6
5
1.2
0.6
0.7
3.5
2
0.9
0.35
1
-

Conversion
factor
(10.0 eV)
0.5
0.60
0.6
0.5
0.8
1.1
-

12. Appendix

Gas name (displayed name)
Trifluoroethanol, 2,2,2Trifluoroethene
Trifluoroethyl methyl ether, 2,2,2Trifluoroiodomethane
Trimethoxymethane
Trimethoxyvinylsilane
Trimethylamine
Trimethylbenzene mixtures
Trimethylbenzene, 1,3,5Trimethylborate
Trimethylcyclohexane, 1,2,4Trimethylene oxide
Trimethylsilane
Trioxane
Turpentine
TVOC
Undecane
Vanillin
Vinyl acetate
Vinyl bromide
Vinyl chloride
Vinyl ethyl ether
Vinyl fluoride
Vinyl-2-pyrrolidinone, 1Vinylcyclohexene
Vinylene carbonate
Vinylidene difluoride
Vinylsilane
Xylene mixed isomers
Xylene, mXylene, oXylene, pXylidine, all

12-5 Volatile organic compound (VOC) conversion gas list

Gas name (alias)

Formula

Trifluoroethene
2,2,2-trifluoroethyl methyl ether
Trifluoroiodomethane
Methyl orthoformate
Vinyltrimethoxysilane
Trimethylamine
Trimethylbenzene (isomer mixtures)
Trimethylbenzene
Trimethylborate
1,2,4-trimethylcyclohexane
Trimethylene oxide
Trimethylsilane
1,3,5-trioxane
Turpentine oil
Total volatile organic compounds
Normal undecane
Vanillin
Vinyl acetate
Vinyl bromide
Vinyl chloride
Vinyl ethyl ether
Vinyl fluoride
N-vinyl-2-pyrrolidone
Vinylcyclohexene
Vinylene carbonate
Vinylidene fluoride monomer
Vinylsilane
Xylenem-xyleneo-xylenep-xylene
Xylidine (mixtures)
197/204

CAS number

C2H3F3O
C2HF3C3H5F3O
CF3I
C4H10O3
C5H12O3Si
C3H9N
C9H12
C9H12
C3H9BO3C9H18
C3H6O
C3H10SiC3H6O3
C10H16359-11-5
460-43-5
2314-97-8
149-73-5
2768-02-7
75-50-3
25551-13-7
108-67-8
121-43-7
2234-75-5
503-30-0
993-07-7
110-88-3
9005-90-7

C11H24C8H8O3C4H6O2C2H3BrC2H3Cl
C4H8O
C2H3F
C6H9NO
C8H12
C3H2O3C2H2F2C2H6Si
C8H10
C8H10
C8H10
C8H10
C8H11N

1120-21-4
121-33-5
108-05-4
593-60-2
75-01-4
109-92-2
75-02-5
88-12-0
100-40-3
872-36-6
75-38-77291-09-0
1330-20-7
108-38-3
95-47-6
106-42-3
1300-73-8

Conversion
factor
(10.6 eV)
5
10
2
1
1.0
0.5
0.3
0.4
1
1
1.5
1
2
0.6
1
0.9
1
1.1
1.5
2.1
0.6
2
0.9
0.7
1
5
1.5
0.40
0.4
0.6
0.4
0.7

Conversion
factor
(10.0 eV)
10
0.5
0.3
0.5
1
3.1
1.77
0.9
1.9
0.95
3.3
0.7
5
0.59
0.53
0.6
0.59
0.6

12. Appendix

12-6 List of interference gases for electrochemical type sensors

12-6 List of interference gases for electrochemical type sensors
This is a list of interference gases for electrochemical type oxygen sensors and toxic gas sensors.
The values indicated here are representative values measured in a laboratory environment using new
sensors and filters. Note that the condition of the sensors and filters and environmental factors at the site
such as temperature and humidity will affect susceptibility to interference. These figures may differ from theactual values. Use them as reference values to identify the presence of interference gases and the degreeof interference influence.

CAUTION A false alarm may occur with measurements performed in an environment where strong interference
gases are present.

<ESR-X13P (O2)>
Gas name

Chemical formula

Gas concentration

HydrogenCarbon monoxide
Sulfur dioxide
Hydrogen sulfide

H2
CO
SO2
H2S

2 vol%
2,980 ppm
1,010 ppm
292 ppm

Reading-2.8 % O2
0.2 % O2
0.3 % O2
0.1 % O2

MethaneIsobutane

CH4
HC (i-C4H10)

50 vol%50 vol%-0.03 % O2
-0.14 % O2

<ESR-A13i (H2S)>
Gas name

Chemical formula

Gas concentration

Sulfur dioxideSO225.0 ppm

Reading

Hydrogen chloride

HCl

3.2 ppm

0.0 ppm

AmmoniaNH3

38.6 ppm

0.0 ppm
0.0 ppm

0.0 ppm

Ozone

O3

0.48 ppm

Chlorine

Cl2

2.0 ppm

0.0 ppm

MethaneCH4

1.26 vol%0.0 ppm

Isobutane

HC (i-C4H10)

0.45 vol%0.0 ppm

Isobutylene

C4H8

1,000 ppm

0.1 ppm

Gas name

Chemical formula

Gas concentration

HydrogenH2

100 ppm

Sulfur dioxide

SO230 ppm0 ppm

Hydrogen sulfide

H2S

30 ppm0 ppm

Hydrogen chloride

HCl

11.7 ppm-1 ppmHydrogen cyanide

HCN

1.8 ppm-1 ppmAmmoniaNH3

255 ppm

1 ppm

Ozone

O3

1.8 ppm

0 ppm<ESR-A13P (CO)>Reading
11 ppmChlorine

Cl2

0.8 ppm

0 ppm

MethaneCH3

1.25 vol%0 ppm

Isobutane

HC (i-C4H10)

0.45 vol%-1 ppm198/20412. Appendix

12-6 List of interference gases for electrochemical type sensors<ESF-A24R2 (H2S)>
Gas name

Chemical formula

Gas concentration

Carbon monoxideCO3,020 ppm

Reading

Carbon dioxide

CO2

20 vol%-1 ppmSulfur dioxide

SO2

100 ppm

20 ppm-2 ppm

182 ppm

Hydrogen chloride

HCl

15 ppmAmmoniaNH3

400 ppm

1 ppm

Ozone

O3

1.1 ppm-1 ppmChlorine

Cl2

5.0 ppm

1 ppm<ESF-B242 (NH3)>
Gas name

Chemical formula

Gas concentration

Carbon dioxide

CO22,500 ppm

Reading
1.8 ppm

Sulfur dioxide

SO2

10 ppm-5.3 ppm

Hydrogen sulfide

H2S

3.0 ppm-2.5 ppm

Hydrogen chloride

HCl

3.2 ppm-2.6 ppm

Ozone

O3

2.2 ppm

4.5 ppm

ChlorineCl2

1.6 ppm-0.8 ppm<ESF-C930 (Cl2)>
Gas name

Chemical formula

Gas concentration

Carbon monoxideCO2,970 ppm

Reading
0.00 ppm

Carbon dioxide

CO22,500 ppm

0.01 ppm-0.04 ppm

Hydrogen sulfide

H2S

8.0 ppm

Hydrogen chloride

HCl

15 ppm

0.02 ppm

Hydrogen cyanideHCN

7.8 ppm-0.01 ppm

AmmoniaNH3

75 ppm

-0.02 ppm

Ozone

O3

2.4 ppm

0.24 ppm

MethaneCH4

100 vol%-0.02 ppm

<ESF-B249 (O3)>
Gas name

Chemical formula

Gas concentration

Carbon monoxideCO2,950 ppm

Reading
0.00 ppm

Carbon dioxide

CO22,500 ppm

0.02 ppm

Sulfur dioxide

SO20.50 ppm

0.01 ppm

Hydrogen sulfide

H2S

1.0 ppm-0.04 ppm

Hydrogen chloride

HCl

15 ppm

0.58 ppm

AmmoniaNH3

75 ppm-0.06 ppm

ChlorineCl2

1.5 ppm

2.01 ppm

MethaneCH450,000 ppm

0.00 ppm

199/20412. Appendix

12-6 List of interference gases for electrochemical type sensors<ESF-A24E2 (HCl)>
Gas name

Chemical formula

Gas concentration

Carbon monoxideCO2,950 ppm

Reading
0.07 ppm

Carbon dioxide

CO250,000 ppm-0.02 ppm

Sulfur dioxide

SO2

10 ppm0.34 ppm

Hydrogen sulfide

H2S

1.6 ppm

1.14 ppm

AmmoniaNH3

400 ppm-0.19 ppm

Ozone

O3

2.4 ppm-0.05 ppm

ChlorineCl2

2.5 ppm

0.40 ppm

MethaneCH4

25,000 ppm-0.01 ppm

<ESF-A24D4 (SO2)>
Gas name

Chemical formula

Gas concentration

Reading

Carbon monoxideCO3,020 ppm

16.4 ppm

Carbon dioxide

CO2

20 vol%0.1 ppm

Hydrogen sulfide

H2S

1,010 ppm

0.7 ppm

Hydrogen chloride

HCl

15 ppm0.1 ppm

AmmoniaNH3

400 ppm-0.1 ppm-0.8 ppm

Ozone

O3

1.1 ppm

Chlorine

Cl2

5.0 ppm

0.1 ppm

MethaneCH4

100 vol%-0.1 ppm<ESF-A24D (HCN) Japan Ex model>
Gas name

Chemical formula

Gas concentration

Reading

Carbon monoxideCO3,040 ppm

15.5 ppm

Carbon dioxide

CO2

20 vol%0.3 ppm

Sulfur dioxide

SO2

6.0 ppm

20.4 ppm

Hydrogen sulfide

H2S

1.0 ppm

3.6 ppm

Hydrogen chloride

HCl

15 ppm16.1 ppm

AmmoniaNH3

400 ppm

0.3 ppm

Ozone

O3

1.8 ppm-8.5 ppm

ChlorineCl2

1.5 ppm-2.9 ppm

MethaneCH4

100 vol%

0.4 ppm

200/20412. Appendix

12-7 Radio law certification

12-7 Radio law certification
This product is certified as complying with radio laws in individual countries and regions as follows.
The following actions are prohibited by radio laws. The user and/or retailer may be subject to punishment if
prohibited actions are committed.
 Use in countries or regions in which radio law certification has not been obtained
 Sale in countries or regions in which radio law certification has not been obtained Disassembly or modification of the product Removal of certification labels from the product
If this product is used aboard marine vessels, the radio laws of the country bordering the territorial waters
shall apply. In such cases, use shall be prohibited in countries or regions in which radio law certification has
not been obtained.
Check to confirm that industrial, scientific, and medical equipment (e.g., microwave ovens), on-premises
radio stations for mobile identification used in plant manufacturing lines (radio stations requiring a license),and specified low-power radio stations are not operated in the frequency band (2.4 GHz) used by the
product. If the product causes radio interference to a radio station for mobile identification, take measures toeliminate radio interference—for example, using the product in a different location or stopping radio
emissions.
Wireless specifications
Wireless
Protocol:communication
Version:Frequency:
Modulation:
Output:Radio lawcertification(Country/region)
Radio Act
(Japan)Bluetooth Low Energy
Ver. 4.2
2,402 MHz to 2,480 MHz
FSK
Maximum 6 dBm

Details

This product contains radio equipment certified to comply with technical standards inaccordance with the Radio Act. Accordingly, a radio station license is not required
when using this product.

Construction design certification number: 001-A07864
Wireless frequency: 2,402 MHz to 2,480 MHz
Maximum wireless output: 6 dBm
RE Directive(EU countries)

FCC compliance(United States)

We declare that this equipment complies with the basic requirements of Directive
2014/53/EU and other relevant provisions. Connect to the network with radio waves offrequency 2.4 GHz band and maximum output 6 dBm.
This device complies with part 15 of the FCC Rules. Operation is subject to thefollowing two conditions: (1) This device may not cause harmful interference, and (2)this device must accept any interference received, including interference that may
cause undesired operation.
FCC CAUTION
Changes or modifications not expressly approved by the party responsible forcompliance could void the user’s authority to operate the equipment.

201/20412. Appendix

12-7 Radio law certification

Note: This equipment has been tested and found to comply with the limits for a ClassA digital device, pursuant to part 15 of the FCC Rules. These limits are designed toprovide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and canradiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interferencein which case the user will be required to correct the interference at his own expense.

IC compliance(Canada)This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment and meets the FCC radio frequency (RF) Exposure
Guidelines. This equipment has very low levels of RF energy that is deemed tocomply without testing of specific absorption rate (SAR).
This device complies with Industry Canada’s license-exempt RSSs. Operation is
subject to the following two conditions:This device may not cause interference; andThis device must accept any interference, including interference that may cause
undesired operation of the device.
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux
appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions
suivantes:
l’appareil ne doit pas produire de brouillage;
l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique subi, même si lebrouillage est susceptible d’en compromettre le fonctionnement.
This equipment complies with IC radiation exposure limits set forth for an uncontrolledenvironment and meets RSS-102 of the IC radio frequency (RF) Exposure rules. Thisequipment has very low levels of RF energy that is deemed to comply without testingof specific absorption rate (SAR).

ACMA(Australia)

Cet équipement est conforme aux limites d’exposition aux rayonnements énoncées
pour un environnement non contrôlé et respecte les règles d’exposition auxfréquences radioélectriques (RF) CNR-102 de l’IC. Cet équipement émet une énergie
RF très faible qui est considérée comme conforme sans évaluation du débit
d’absorption spécifique (DAS).
Model: GX-9000, GX-9000H

202/20412. Appendix

12-8 Limited Warranty and Limitation Liability

12-8 Limited Warranty and Limitation Liability
RIKEN KEIKI CO., LTD. (RIKEN) warrants the product to be free from defects in material and workmanshipunder normal use and service for a period of the number of years to be listed in “Table: List of warranty
years”, beginning on the date of shipment to the buyer. This warranty extends only to the sale of new andunused products to the original buyer. RIKEN’s warranty obligation is limited, at RIKEN’s option, to repair or
replacement of a defective product that is returned to a RIKEN KEIKI Quality control center located in Japan
within the warranty period. In no event shall RIKEN’s liability hereunder exceed the purchase price actually
paid by the buyer for the Product.
This warranty does not include:a) fuses, disposable batteries or the routine replacement of parts due to the normal wear and tear of the
product arising from use;b) any product which in RIKEN’s opinion, has been misused, altered, neglected or damaged, by accident or
abnormal conditions of operation, handling or use;c) any damage or defects attributable to repair of the product by any person other than an authorized
dealer, or the installation of unapproved parts on the product; or
The obligations set forth in this warranty are conditional on:a) proper storage, installation, calibration, use, maintenance and compliance with the product manual
instructions and any other applicable recommendations of RIKEN;b) the buyer promptly notifying RIKEN of any defect and, if required, promptly making the product available
for correction. No goods shall be returned to RIKEN until receipt by the buyer of shipping instructions
from RIKEN; andc) the right of RIKEN to require that the buyer provide proof of purchase such as the original invoice, bill ofsale or packing slip to establish that the product is within the warranty period.
THE BUYER AGREES THAT THIS WARRANTY IS THE BUYER’S SOLE AND EXCLUSIVE REMEDY AND
IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TOANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
RIKEN SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR BASED ON
CONTRACT, TORT OR RELIANCE OR ANY OTHER THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion orlimitation of incidental or consequential damages, the limitations and exclusions of this warranty may not
apply to every buyer. If any provision of this warranty is held invalid or unenforceable by a court ofcompetent jurisdiction, such holding will not affect the validity or enforceability of any other provision.
Contacting RIKEN KEIKI
Email us at: intdept@rikenkeiki.co.jp
Visit RIKEN KEIKI website at: https://www.rikenkeiki.com/
JAPAN: +81-3-3966-1113

203/20412. Appendix

12-8 Limited Warranty and Limitation Liability

Table: List of warranty years
Product warranty
3 years
Sensor warranty
Sensor model

Detection target gas

Warranty period

NCF-6322P

Methane (CH4), isobutane (HC (i-C4H10)), hydrogen (H2),acetylene (C2H2)

3 years

TEF-7520P

Methane (CH4), isobutane (HC (i-C4H10)), hydrogen (H2)

3 years

IRF-4341

Methane (CH4)

3 years

IRF-4345

Isobutane (HC (i-C4H10))

3 years

IRF-4443

Carbon dioxide (CO2)

3 years

ESR-X13P

Oxygen (O2)

3 years

ESR-A13i

Hydrogen sulfide (H2S) low concentration

3 years

ESR-A13P

Carbon monoxide (CO)

3 years

ESF-A24R2

Hydrogen sulfide (H2S) high concentration

3 years

ESF-B242

Ammonia (NH3)2 years

ESF-C930

Chlorine (Cl2)

3 years

ESF-B249

Ozone (O3)

1 yearESF-A24E2

Hydrogen chloride (HCl)

3 years

ESF-A24D4

Sulfur dioxide (SO2)

3 years

ESF-A24D (Japan Ex model)

Hydrogen cyanide (HCN)

3 years

PIF-001

Volatile organic compounds (VOC, 10.6 eV, ppb)

1 year

PIF-002

Volatile organic compounds (VOC, 10.6 eV, ppm)

1 year

PIF-003

Volatile organic compounds (VOC, 10.0 eV, ppm)

1 year

204/204

Revision history
Issue

Revision details

Issue date

0First issue2023/11/6

1

Cl2 sensor model changed to ESF-C930, 3-1 Aluminum trunkcase added, DoC updated

2024/3/6

2

2-4 Explosion-proofing guideline compliance corrected2024/3/14

3

DoC updated

2024/5/31