PT0E-2160

Portable Gas Detector
SC-9000
Operating Manual(PT0-211)

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
1-3-1 Detection target gases and product model ............................................................................... 7
1-3-2 F sensor combination patterns ................................................................................................. 9
1-4 DANGER, WARNING, CAUTION, and NOTE.................................................................................. 11
1-5 Checking standards and explosion-proof specifications ................................................................... 122.

Important Safety Information .................................................................................................................... 13
2-1 Danger information .......................................................................................................................... 13
2-2 Warnings ......................................................................................................................................... 15
2-3 Precautions ...................................................................................................................................... 17
2-4 Safety information ............................................................................................................................ 19

3.

Product Configuration .............................................................................................................................. 22
3-1 Main unit and accessories ............................................................................................................... 22
3-1-1 Main unit ................................................................................................................................. 22
3-1-2 Accessories ............................................................................................................................ 23
3-1-3 Optional accessories .............................................................................................................. 24
3-2 Part names and functions ................................................................................................................ 26
3-2-1 Main unit and battery unit ....................................................................................................... 26
3-2-2 Control panel .......................................................................................................................... 27
3-2-3 LCD display ............................................................................................................................ 28

4.

Alarm Functions ....................................................................................................................................... 29
4-1 Gas alarm types............................................................................................................................... 29
4-2 Gas alarm setpoints ......................................................................................................................... 29
4-3 Gas alarm patterns .......................................................................................................................... 33
4-4 Fault alarm patterns ......................................................................................................................... 36
4-5 Outside operating temperature range warning ................................................................................. 37

5.

Usage Instructions ................................................................................................................................... 38
5-1 Usage note ...................................................................................................................................... 38
5-2 Removing and attaching the battery unit and charging .................................................................... 39
5-2-1 Removing and attaching the battery unit................................................................................. 39
5-2-2 Charging the lithium ion battery unit (BUL-9000) .................................................................... 41
5-2-3 Replacing the dry battery unit (BUD-9000) ............................................................................. 43
5-3 Connecting the sampling probe ....................................................................................................... 45
5-4 Turning on the power ....................................................................................................................... 46
5-5 Performing fresh air adjustment in detection mode .......................................................................... 51
5-6 Gas detection .................................................................................................................................. 53
5-6-1 Detecting gas concentration ................................................................................................... 54
5-6-2 Basic operating flow in detection mode................................................................................... 55
5-6-3 Confirmation beep operation .................................................................................................. 56
5-7 Recording gas concentration logs (snap logger) .............................................................................. 57
5-8 Stopping the pump........................................................................................................................... 58
5-9 Turning off the power ....................................................................................................................... 59

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Contents

6.

Settings (Display Mode) ........................................................................................................................... 60
6-1 Display mode items ......................................................................................................................... 60
6-2 Switching to display mode ............................................................................................................... 63
6-3 Checking settings ............................................................................................................................ 64
6-3-1 Clearing the PEAK value ........................................................................................................ 64
6-3-2 Displaying the snap logger (gas concentration/alarm status) .................................................. 65
6-3-3 Displaying adjustment records ................................................................................................ 66
6-3-4 Displaying bump test records ................................................................................................. 67
6-3-5 Displaying alarm setpoints ...................................................................................................... 68
6-4 Display mode settings ...................................................................................................................... 70
6-4-1 Setting the user ID .................................................................................................................. 70
6-4-2 Setting the station ID .............................................................................................................. 71
6-4-3 Setting a Bluetooth® device connection .................................................................................. 72
6-4-4 Setting the buzzer volume ...................................................................................................... 73
6-4-5 Switching display language to English (ATEX/IECEx model) .................................................. 74
6-4-6 Switching display language to Japanese (Japan Ex model) ................................................... 75

7.

Settings (User Mode) ............................................................................................................................... 76
7-1 User mode display items.................................................................................................................. 76
7-2 Switching to user mode.................................................................................................................... 78
7-3 Gas alarm settings ........................................................................................................................... 79
7-3-1 Setting alarm setpoints ........................................................................................................... 79
7-3-2 Setting alarm type................................................................................................................... 82
7-3-3 Setting alarm pattern .............................................................................................................. 84
7-3-4 Resetting alarm setpoints ....................................................................................................... 85
7-3-5 Enabling/disabling the alarm function ..................................................................................... 86
7-4 Other user mode settings................................................................................................................. 87
7-4-1 Setting the buzzer................................................................................................................... 87
7-4-2 Setting the date and time ........................................................................................................ 88
7-4-3 Setting the display language................................................................................................... 89
7-4-4 Displaying version information ................................................................................................ 90

8.

Maintenance ............................................................................................................................................ 92
8-1 Maintenance intervals and items...................................................................................................... 92
8-2 Performing gas adjustment .............................................................................................................. 94
8-2-1 Preparation for gas adjustment ............................................................................................... 94
8-2-2 Performing fresh air adjustment .............................................................................................. 98
8-2-3 Setting span adjustment ....................................................................................................... 100
8-2-4 Performing span adjustment ................................................................................................. 103
8-3 Performing bump tests ................................................................................................................... 105
8-4 Performing alarm tests ................................................................................................................... 107
8-5 Cleaning procedure ....................................................................................................................... 108
8-6 Parts replacement.......................................................................................................................... 109
8-6-1 Periodic replacement parts ................................................................................................... 109
8-6-2 Replacing the sampling probe dust filter ............................................................................... 111

9.

Storage and Disposal............................................................................................................................. 112
9-1 Procedures for storage or when not in use for extended periods ................................................... 112
9-2 Procedures for use after storage.................................................................................................... 113
9-3 Product disposal ............................................................................................................................ 113

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Contents

10.

Troubleshooting ..................................................................................................................................... 114
10-1 Product abnormalities .................................................................................................................... 114
10-2 Reading abnormalities ................................................................................................................... 118

11.

Product Specifications ........................................................................................................................... 119
11-1 Main unit specifications .................................................................................................................. 119
11-2 Sensor specifications ..................................................................................................................... 121

12.

Appendix................................................................................................................................................ 124
12-1 Data logger function ....................................................................................................................... 124
12-2 Zero suppression function.............................................................................................................. 126
12-3 Zero follower function .................................................................................................................... 127
12-4 List of interference gases for electrochemical type sensors ........................................................... 128
12-5 Radio law certification .................................................................................................................... 137
12-6 Warranty policy .............................................................................................................................. 139

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1. Product Overview

1-1 Introduction

1

Product Overview
1-1 Introduction
Thank you for purchasing the SC-9000 Portable Gas Detector (“the 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 related programs:
 RK Link dedicated portable gas detector app*1 Operating Manual (PT9E-022)
 SW-9000 Series Data Logger Management Program*2 Operating Manual (PT0E-208)
 MT-9000 Series Configuration Program*3 Operating Manual (PT0E-209)*1: Can be installed on a smartphone from Google Play or App Store free of charge.
*2: Can be installed on a PC from the separately sold CD-ROM.
*3: Can be installed on a PC from the RIKEN KEIKI website.

RIKEN KEIKI accepts no liability for accidents or damage resulting from use of the product, whether within or
outside the warranty period.
Be sure to check the warranty policy described in ‘12-6 Warranty policy’.
The product includes Bluetooth® functionality. If the function is enabled (selected at the time of purchase),
turning the setting on allows communication with a smartphone on which the RK Link dedicated portable gas
detector app has been installed.
Google Play is a trademark of Google LLC.
App Store is a service mark of Apple Inc.
Bluetooth® is a registered trademark of Bluetooth SIG, Inc. and is used by RIKEN KEIKI under license.

1-2 Intended use
The product is a multi-gas gas detector capable of detecting up to three different toxic gases in air.
The toxic gases that can be detected by the product include ammonia (NH3), chlorine (Cl2), and silane (SiH4),
commonly used in semiconductor plants.
The alarm function triggers an alarm if the gas concentration reaches or exceeds the alarm setpoints.
Note that the detection results provided by the product do not constitute a guarantee with respect to life orsafety.
Check the specifications before use to confirm that correct gases will be detected 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 type

Toxic gas sensor

ESF sensor

Detection principle

Electrochemical type

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Sensor model
ESF-B242 (NH3)
ESF-C930 (Cl2)
ESF-B249 (O3)
ESF-A24E2 (HCl)
ESF-A24D (HCN) Japan Ex model
ESF-B248 (HF) Japan Ex model
ESF-B248X (HF) ATEX/IECEx model
ESF-A24D (PH3)
ESF-B248 (F2)
ESF-A24D (SiH4)
ESF-A24D2 (NO)ESF-AA20 (NO2)
ESF-A24D (SO2)
ESF-A24E2 (HBr)
ESF-B24A (ClF3)
ESF-A24D (Si2H6)

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.

1-3-1 Detection target gases and product model
The SC-9000 alphanumeric product codes are categorized as follows:

E
①

②

③

④

⑤

⑥

⑦

⑧

⑨

⑩

⑪

Explosion-proof
specifications
Bluetooth® functionality
Battery typeF sensor (F3)
F sensor (F2)
F sensor (F1)
Product model①: Product model
Code

Details

E

SC-9000② to ⑦: F sensors (F1/F2/F3)
Code

Details

Code

Details00

N/A (dummy sensor)

EA

ESF-B248X (HF) ATEX/IECEx model

E1

ESF-B242 (NH3)EB

ESF-A24D (PH3)

E2

ESF-C930 (Cl2)EC

ESF-B248 (F2)E3

ESF-B249 (O3)ED

ESF-A24D (SiH4)

E4

ESF-A24E2 (HCl)EE

ESF-A24D2 (NO)

E5

‒

EF

ESF-AA20 (NO2)E6

ESF-A24D (HCN) Japan Ex modelEG

ESF-A24D (SO2)

E7

‒

EH

ESF-A24E2 (HBr)

E8

‒

EI

ESF-B24A (ClF3)

E9

ESF-B248 (HF) Japan Ex model

EJ

ESF-A24D (Si2H6)* Some restrictions apply to the available F sensor (F1/F2/F3) combinations. (Refer to ‘1-3-2 F sensor combination patterns’.)

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1. Product Overview

1-3 Checking the detection target gases and product model⑧: Battery type
CodeSpecifications

L

Lithium ion battery unit BUL-9000

D

Dry battery unit BUD-9000⑨: Bluetooth® functionality
Code

Specifications

0

Bluetooth® not supported

1

Bluetooth® supported⑩⑪: Explosion-proof specifications
Code

Specifications

00

Japan Ex50

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

EE1E2EDL0 00

E00E400D1 50

E00ECEBL1 00

SC-9000

SC-9000

SC-9000

F1

ESF-B242 (NH3)

N/A

N/A

F2

ESF-C930 (Cl2)

ESF-A24E2 (HCl)ESF-B248 (F2)F3

ESF-A24D (SiH4)

N/A

ESF-A24D (PH3)

BUL-9000

BUD-9000

BUL-9000

Not supported

Supported

SupportedJapan ExATEX/IECEx

Japan Ex

Product model
F sensor
Battery type
Bluetooth® functionality
Explosion-proof
specifications

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1. Product Overview

1-3 Checking the detection target gases and product model

1-3-2 F sensor combination patterns
The F sensor combination patterns are determined as follows:
1. Select the number of sensors from 1, 2, or 3.
2. Select from group A and/or group B sensors listed in <Sensor groups>.
3. Select the gas type combination for the F sensors to be mounted in each slot from those listed for F1, F2,
and F3 in <Combination pattern table>.
4. For combinations in which gas types can be swapped, arrange the F1, F2, and F3 sensors in the orderindicated in <Sensor code order>.
Example 1: When the following gas types are selected for pattern 7
F1: SO2, F2: Si2H6, F3: NO
Sensors of the selected gas types can be installed in any of slots F1, F2, and F3, so the slots
are determined in accordance with the sequence specified in <Sensor code order>. The
combination pattern will therefore be as follows:
F1: NO (EE), F2: SO2 (EG), F3: Si2H6 (EJ)The codes in parentheses are the sensor codes.

Example 2: When the following gas types are selected for pattern 8
F1: Si2H6, F2: HF, F3: NO
HF must be mounted in slot F2, and SiH4. NO can both be used in either slots F1 or F3. The
combination pattern will therefore be as follows in accordance with the sequence specified in<Sensor code order>:F1: NO (EE), F2: HF (E9), F3: Si2H6 (EJ)The codes in parentheses are the sensor codes.

<Sensor groups>Group

DetailsA

ESF-A24E2 (HCl), ESF-A24D (HCN) Japan Ex model, ESF-A24D (PH3),
ESF-A24D (SiH4), ESF-A24D2 (NO), ESF-AA20 (NO2), ESF-A24D (SO2),
ESF-A24E2 (HBr), ESF-A24D (Si2H6)

B

ESF-B242 (NH3), ESF-C930 (Cl2), ESF-B249 (O3), ESF-B248 (HF) Japan Ex model,
ESF-B248X (HF) ATEX/IECEx model, ESF-B248 (F2), ESF-B24A (ClF3)<Combination pattern table>
Number of
Numbersensors inofPatterneach group
sensorsA
B

Sensor slot
F1

1

‒

1

‒

‒

1

2

‒

2

‒

3

‒

1 type4

2 types1

1

2

HCl/HCN*2/
PH3/SiH4/NO/NO2/
SO2/HBr/Si2H6
NH3/Cl2/O3/HF/F2/
ClF3
HCl/HCN*2/
PH3/SiH4/NO/NO2/
SO2/HBr/Si2H6
NH3

‒
5

‒

F2

6

Cl2/O3/HF/F2/ClF3
NH3
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Cl2/O3/HF/F2/ClF3

F3‒‒
HCl/HCN*2/
PH3/SiH4/NO/NO2/
SO2/HBr/Si2H6
HCl/HCN*2/
PH3/SiH4/NO/NO2/
SO2/HBr/Si2H6
HCl/HCN*2/
PH3/SiH4/NO/NO2/
HBr/Si2H6‒

1. Product Overview

Numberofsensors

3 types*1

1-3 Checking the detection target gases and product model

Number ofsensors ineach group
A
B

Sensor slot
Pattern

3

‒

7

2

1

8

1

2

9

F1

F2

F3

HCN*2/
PH3/SiH4/NO/
NO2/SO2/Si2H6
HCN*2/
PH3/SiH4/NO/
NO2/Si2H6

HCl/HCN*2/
PH3/SiH4/NO/NO2/
SO2/HBr/Si2H6

NH3

Cl2/O3/HF/F2/ClF3

HCl/HCN*2/
PH3/SiH4/NO/NO2/
SO2/HBr/Si2H6
HCl/HCN*2/
PH3/SiH4/NO/NO2/
HBr/Si2H6
HCl/HCN*2/
PH3/SiH4/NO/NO2/
HBr/Si2H6*1: Three-sensor types cannot be configured with three group B sensors.
*2: Japan Ex model<Sensor code order>
Code

Sensor

E1

NH3

E2

Cl2

E3

O3

E4

HCl

E5

‒

E6

HCN (Japan Ex model)

E7

‒

E8

‒

E9

HF (Japan Ex model)

EA

HF (ATEX/IECEx model)

EB

PH3

EC

F2

ED

SiH4

EE

NO

EF

NO2

EG

SO2

EH

HBr

EI

ClF3

EJ

Si2H6

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Cl2/O3/HF/F2/ClF3

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 serious

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

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
location

Ex marking/CE marking
location

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

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Typical nameplate for ATEX/IECEx models

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 is guaranteed.
For information on the operating temperature range, refer to ‘11-1 Main unit 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 when evaluated in conjunction with this unit and when used inconjunction with a certified main unit.
The main unit to which the battery unit can be connected is the SC-9000.
 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 is guaranteed.
For information on the operating temperature range, refer to ‘11-1 Main unit 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 is guaranteed.
For information on the operating temperature range, refer to ‘11-1 Main unit specifications’ and ‘11-2
Sensor specifications’.
Gas outlet
 Toxic gas may be discharged from the gas outlet. Never breathe in this air.

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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 (GAS IN) or
outlet (GAS OUT) of the product. Be careful to avoid excessive pressure during use.
 Do not connect the sampling probe directly to locations pressurized above atmospheric pressure. Doingso may result in damage to the internal piping.
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 result in
discoloration or damage to the fabric.
If contact occurs, rinse the area immediately with plenty of water.
Fresh air adjustment in surrounding atmosphere When fresh air adjustment is performed in the surrounding atmosphere, check the air for cleanness
before starting. The presence of miscellaneous or interference gases will make it impossible to adjust
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 detection will not be possible if a battery low voltage alarm occurs. If the alarm occurs during use,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 detection will not be possible, 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.
 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.

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2. Important Safety Information

2-2 Warnings

 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.

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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 to waterfrom a faucet or shower as water may get in the product if it is subjected to water pressure. Note that 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 detection.
 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 IP66/68 rating (IPx8 implies no water ingress whensubmerged underwater at a depth of 2 m for one hour) does not mean that the product is capable ofdetecting gas while or after being subjected to such environmental conditions. Be sure to remove any
dust or water before use.
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 forming inside theproduct or sampling probe.
 Condensation forming inside the product or sampling probe may cause clogging or gas adsorption,
which may prevent accurate gas detection. 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 highvoltage devices).
Verify that the flow confirmation icon is rotating.
 Accurate gas detection is not possible if the flow confirmation icon is not rotating. Check to confirm thatthe suction is operating correctly.
Verify that the operating status icon is blinking.
 Gas cannot be detected correctly if the operating status icon is not blinking. (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
detection.

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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 and waterproof
performance.
Sensors 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.
 Due to the way they operate, electrochemical type sensors may exhibit positive or negative sensitivity togases other than the detection target gas. In environments where interference gases are present, thereading may differ from the actual concentration of the detection target gas present. Note that false
alarms or M OVER alarms may be triggered, especially at high concentrations. (Refer to ‘12-4 List ofinterference gases for electrochemical type sensors’.) Due to the way the sensor operates, 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 turning on
the power before performing gas adjustment.
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 usage 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 tocheck pump suction (by running the product for approximately three minutes). Grease inside the pump
motor may solidify and prevent operation if the product is not operated for extended periods.
 After an extended period of storage, be sure to perform fresh air adjustment before resuming use. For
information on readjustment including fresh air adjustment, contact RIKEN KEIKI.
 Do not use the product in locations where miscellaneous gases are present.
 Take care when using the product in locations where interference gases are present. (Refer to ‘12-4 Listof interference gases for electrochemical type sensors’.)

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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 is capable of detecting up to three different gas types.
When the gas concentration exceeds the alarm setpoint, an LCD display, LED, and piezoelectric buzzer will
be activated to alert.
Up to three F sensors can be mounted for detecting toxic gases.
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 SC-9000 features a single built-in pumpfor simultaneous detection using all of the sensors installed in the product.

<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. Use with three Panasonic NCR18650GA
batteries arranged in a parallel.
 BUD-9000 is specified to use dry batteries. Japan Ex models use six Toshiba LR6 batteries. ATEX/IECEx
models can use either six Toshiba LR6 or six Duracell MN1500 batteries. The six batteries are used in two
sets of three in series.
 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 shall not
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>Explosion-proof class
Main unit:

Ex ia IIC T4 Ga

BUL-9000 lithium ion battery unit:

Ex ia IIC T4 Ga

BUD-9000 dry battery unit:

Ex ia IIC T4 Ga

Compliant explosion-proofing guidelines
Main unit:

JNIOSH-TR-46-1:2020

BUL-9000 lithium ion battery unit:

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

BUD-9000 dry battery unit:

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

19 / 140

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 Main unit specifications’ and ‘11-2
Sensor specifications’.

<ATEX/IECEx models>Explosion-proof class

Ambient temperature

Battery type

-40 °C ≤ Ta ≤ +60 °C

BUL-9000-40 °C ≤ Ta ≤ +60 °C

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

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

BUD-9000
MN1500 (Duracell)

Ex ia IIC T4 Ga
II 1 G Ex ia IIC T4 Ga
Ex ia IIC T4 Ga
II 1 G Ex ia IIC T4 Ga
Ex ia IIC T4 Ga
II 1 G Ex ia IIC T4 Ga
Ex ia IIC T3 Ga
II 1 G Ex ia IIC T3 Ga

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

WARNING Do not attempt to disassemble or modify the product.
 The product is explosion-proof. With the exception of specified components, it cannot be disassembled
or modified.
 If the enclosure is damaged it shall be repaired before further use.
 The sensor must not be exposed to ultraviolet light or used in equipment in which it is not fully enclosed.

SC-9000 (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 shall not exceed 5.7 Vdc.

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2. Important Safety Information

2-4 Safety information

SC-9000 (with BUD-9000)
 Do not replace battery unit in a hazardous location.
 Do not replace dry batteries in a hazardous location.
 For Japan Ex models, be sure to use alkaline AA batteries, type LR6 manufactured by Toshiba. For
ATEX/IECEx models, be sure to use alkaline AA batteries, type LR6 manufactured by Toshiba or
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: Last digit of year of manufacture (0 to 9)
B: Manufacturing month (1 to 9, XYZ for Oct. to Dec.)
C: Manufacturing lot
D: Serial number
E: Factory code

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/

21 / 140

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’.

Main unit

Battery unit

22 / 140

3. Product Configuration

3-1 Main unit and accessories

3-1-2 Accessories
Part name

Remarks

Sampling probe(Approx. 94 cm)

Part No.:4733 9406 00 (sampling probe)

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) on ATEX/IECEx models.
Part No.: 2594 1435 00

AA alkaline batteries(×6)

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

23 / 140

3. Product Configuration

3-1 Main unit and accessories

3-1-3 Optional accessories
Part name

Remarks

Dry battery unit
(BUD-9000)

Either the dry battery unit or lithium ion
battery is provided, but additional units canbe purchased if required.
Part No. (BUD-9000) :4777 9603 60 (Japan Ex model)
4777 9605 10 (ATEX/IECEx model)

Lithium ion battery
unit (BUL-9000)

Part No. (BUL-9000) :4777 9602 90 (Japan Ex model)
4777 9604 30 (ATEX/IECEx model)

Filter cylinder
retaining belt

Used to attach the filter cylinder to the gas
detector. Used only when a sensor requiring
a filter cylinder is installed.
Part No.: 4777 9444 20

Waist belt/
Waist belt attachment

Allow the gas detector to be worn close to
the body.
Use with the shoulder strap isrecommended to avoid dropping the gas
detector.
Part No.:4775 5653 40 (Waist belt)
4775 9853 10 (Waist belt attachment)

Sampling probe
holder(for sampling probe)

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

Adapter plug
(AU/Type O)

Part No.: 2594 1434 20

Adapter plug
(UK/Type BF)

Part No.: 2594 1436 70

LCD protective film
Set of 5

Part No.: 4777 9025 70

24 / 140

3. Product Configuration

3-1 Main unit and accessories

Part name

Remarks

Aluminum storage
case

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

Data logger
management
programPart No.:
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 andconfiguration program are installed.
Part No.: 2440 2728 90

25 / 140

3. Product Configuration

3-2 Part names and functions

3-2 Part names and functions
3-2-1 Main unit and battery unit
1

6
2
3

5

4

No.

Name

Functions1

Control panel

Contains the buttons and LCD for operating the product.

2

Gas inlet (GAS IN)

Draws in the gas. Used to connect the sampling probe.

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.)

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. Product Configuration

3-2 Part names and functions

3-2-2 Control panel
2

No.

1

7

3
4

8

5

9

6

10

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 detection is not inprogress.

4

Buzzer sound opening

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

Performs fresh air adjustment in detection 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 detection mode. Also resets alarms.
Used to select items and adjust numerical values (down) in display
mode and user mode.

7

Gas nameplate

Nameplate indicating the detection target gas name.

8

Alarm LED array (right)

The lamps flash red when an alarm occurs and detection is not inprogress (when the power is turned on or in user mode).

9

DISP/ESC button

Selects display mode.
Selects display items in display mode.

10

POWER/ENTER button

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

27 / 140

3. Product Configuration

3-2 Part names and functions

3-2-3 LCD display
1 2 3

4

5 6 7 8

9
10
11

No.

12

Name

Functions1

Operating status icon

Indicates the detection mode operating status. 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 suction status in detection 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 name of the detection target gas.
The gas names displayed will vary depending on the sensors
installed.

10

Gas concentration display

Displays the detected gas concentration.

11

Gas concentration bar display

The segmented detection range (full scale) displays gas
concentrations as bars. It indicates concentrations as ratios of the fullscale.

12

Units display

Displays units (ppm) according to sensor specifications.

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 LED and buzzer operate
every four seconds here.
 The buzzer volume icon indicates as follows:: High volume: Low volume

28 / 140

4. Alarm Functions

4-1 Gas alarm types

4

Alarm Functions
4-1 Gas alarm types
A gas alarm is triggered instantly if the concentration of the detected gas reaches or exceeds the alarm
setpoints shown in the following tables. (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:
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

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4. Alarm Functions

4-2 Gas alarm setpoints

Hydrogen chloride
HCl

Hydrogen cyanide
HCN*

Sensor model

ESF-A24E2

ESF-A24D

Explosion-proof
specifications

Japan Ex and
ATEX/IECEx

Japan Ex

Display range

0 – 6.00 ppm

0 – 15.0 ppm

Detection range

0 – 6.00 ppm

0 – 15.0 ppm

Detection
target gas

Item

Resolution

Alarm
setpoints*

0.05 ppm

0.1 ppm

First alarm

2.00 ppm

5.0 ppm

Second alarm

4.00 ppm

10.0 ppm

TWA

OFF

OFF

STEL

OFF

4.7 ppm

OVER

6.00 ppm

15.0 ppm

M OVER-0.60 ppm

-1.5 ppm

Not included in the ATEX/IECEx model lineup. Due to export restrictions, this cannot be installed in products exported outside
Japan.

Detection
target gas

Item
Sensor model

Hydrogen fluoride
HF*1

Hydrogen fluoride
HF*2

Phosphine
PH3

ESF-B248

ESF-B248X

ESF-A24D

Explosion-proof
specifications

Japan ExATEX/IECEx

Japan Ex and
ATEX/IECEx

Display range

0 – 1.50 ppm

0 – 1.50 ppm

0 – 1.00 ppm

Detection range

0 – 1.50 ppm

0 – 1.50 ppm

0 – 1.00 ppm

0.01 ppm

0.01 ppm

0.01 ppm

0.50 ppm

0.50 ppm

0.30 ppm

Resolution
First alarm
Alarm
setpoints

Second alarm

1.00 ppm

1.00 ppm

0.60 ppm

TWA

0.50 ppm

0.50 ppm

OFF

STEL

OFF

OFF

OFF

OVER

1.50 ppm

1.50 ppm

1.00 ppm

M OVER-0.15 ppm

-0.15 ppm

-0.10 ppm

*1: Due to export restrictions, this cannot be installed in products exported outside Japan.
*2: Due to export restrictions, concentrations of 0.0 – 0.4 ppm are indicated as 0.0 ppm.

30 / 140

4. Alarm Functions

4-2 Gas alarm setpoints

Detection
target gas

Item

Fluorine
F2

SilaneSiH4

Nitrogen monoxide
NO

Sensor model

ESF-B248

ESF-A24D

ESF-A24D2

Explosion-proof
specifications

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Display range

0 – 3.00 ppm

0 – 15.0 ppm

0 – 100 ppm

Detection range

0 – 3.00 ppm

0 – 15.0 ppm

0 – 100 ppm

0.02 ppm

0.1 ppm

1 ppm

First alarm

1.00 ppm

5.0 ppm

25 ppmSecond alarm

Resolution

Alarm
setpoints

2.00 ppm

10.0 ppm

50 ppmTWA

OFF

5.0 ppm

25 ppm

STEL

OFF

OFF

OFF

OVER

3.00 ppm

15.0 ppm

100 ppm

M OVER-0.30 ppm

-1.5 ppm-10 ppm

Nitrogen dioxide
NO2

Sulfur dioxide
SO2Hydrogen bromide
HBr

Detection
target gas

Item
Sensor model

ESF-AA20

ESF-A24D

ESF-A24E2

Explosion-proof
specifications

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Display range

0 – 15.0 ppm

0 – 6.00 ppm

0 – 6.00 ppm

Detection range

0 – 15.0 ppm

0 – 6.00 ppm

0 – 6.00 ppm

0.1 ppm

0.05 ppm

0.05 ppm

First alarm

5.0 ppm

2.00 ppm

2.00 ppm

Second alarm

4.00 ppm

Resolution

Alarm
setpoints

10.0 ppm

4.00 ppm

TWA

OFF

OFF

OFF

STEL

OFF

OFF

OFF

OVER

15.0 ppm

6.00 ppm

6.00 ppm

M OVER-1.5 ppm-0.60 ppm

-0.60 ppm

Chlorine trifluoride
ClF3

Disilane
Si2H6

Detection
target gas

Item
Sensor model

ESF-B24A

ESF-A24D

Explosion-proof
specifications

Japan Ex and
ATEX/IECEx

Japan Ex and
ATEX/IECEx

Display range

0 – 0.300 ppm

0 – 15.0 ppm

Detection range

0 – 0.300 ppm

0 – 15.0 ppm

Resolution

Alarm
setpoints

0.002 ppm

0.1 ppm

First alarm

0.100 ppm

5.0 ppm

Second alarm

0.200 ppm

10.0 ppm

TWA

OFF

OFF

STEL

OFF

OFF

OVER

0.300 ppm

15.0 ppm

M OVER-0.030 ppm-1.5 ppm

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4. Alarm Functions

4-2 Gas alarm setpoints

NOTE
 The alarm setpoints indicated for the first alarm (WARNING), second alarm (ALARM), TWA alarm, and

STEL alarm in the tables above can be changed (or disabled). (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.

32 / 140

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.
First alarm

Second alarm

TWA alarm

STEL alarm

OVER alarm

M OVER alarm

Buzzersounding

Alarm type

Repeatedalternatingstrong and weak
beeps at about
1-second
intervals“Beep, beep”

Repeatedalternatingstrong and weak
beeps at about
0.5-second
intervals“Beep, beep,
beep, beep”

Repeatedalternatingstrong and weak
beeps at about
1-second
intervals“Beep, beep”

Repeatedalternatingstrong and weak
beeps at about
1-second
intervals“Beep, beep”

Repeatedalternatingstrong and weak
beeps at about
0.5-second
intervals“Beep, beep,
beep, beep”

Repeatedintermittent
beeps at about
1-second
intervals:“Beep, beep”

Alarm LEDarray
flashing

Repeated
flashing at about
1-second
intervals

Repeated
flashing at about
0.5-second
intervals

Repeated
flashing at about
1-second
intervals

Repeated
flashing at about
1-second
intervals

Repeated
flashing at about
0.5-second
intervals

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

First alarm setpoint

Time

Alarm buzzer andlamps<Alarm pattern (L-LL)>: 1-second interval: 0.5-second interval
ResetFirst alarm setpoint
Concentration

Second alarm setpoint

Time

Alarm buzzer andlamps

33 / 140

4. Alarm Functions

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

Reset
Second alarm setpoint

Concentration

First alarm setpoint

Time

Alarm buzzer andlamps

34 / 140

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 detection range is exceeded (over scale), [OVER] appears alternately in the units display area, and[OVER] blinks in the gas concentration display area.
<Display example ([NH3]: First alarm triggered)><Display example ([NH3]: Over scale)>

Alarm type

First
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.

35 / 140

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”)
 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.

36 / 140

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 productis used outside the continuous use environment operating temperature range 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 will be alerted by the audible buzzer andflashing alarm lamp.
Alarm type
Condition
BuzzerAlarm lamp

Outside operating temperature range warning
Less than one hour outside range

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.

Not available

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

37 / 140

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 result in inability to detect gas concentrations
correctly.
Check the following before starting gas concentration detection:
 Confirm that the battery level is sufficient.
 Check to confirm that the sampling tube is not bent or damaged.
 Check to confirm that the filter inside the sampling probe is not contaminated or clogged.
 Check to confirm that the sampling probe is correctly connected to the main unit.
 Product model and specifications
 Gas alarm setpoints

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.

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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 get inthrough the gaps. Water may also get in if minute foreign matter is trapped between the battery unit andthe 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 illustrates the lithium ion
battery unit.

3

4

Main unit

Attach a new battery unit.
Note the connection terminals and protrusions
to ensure 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 detection. 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 is wet.
 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 water andresult 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 detection.
 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 from thelithium ion battery unit charging jack, then close thejack 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 getin through the gaps. Water may also get in if minute foreign matter is trapped between the cover and themain 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 water andresult 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 sampling probe

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

CAUTION Do not use a sampling probe other than that specified by RIKEN KEIKI.
 If the sampling probe is bent or the tip is clogged, correct detection will become impossible, and thereading may be lower than the actual gas concentration.
Check that the sampling probe is not bent and the tip is not obstructed when using the product.
 The sampling probe tip contains a dust filter to prevent foreign matter from being drawn into thesampling probe. If foreign matter is sucked in, replace the dust filter. (Refer to ‘8-6-2 Replacing thesampling probe dust filter’.)1

Insert the sampling probe into the gas inlet (GAS IN)
on the main unit.
Pull the sampling probe to confirm that it does not comeloose.
To detach the sampling probe, pull out while pressing thering on the gas inlet.

Gas inlet(GAS IN)

Samplingprobe

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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 detection 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 detection mode. (Approx. 40 seconds)<Display example>

Date and time display

Battery voltage display

Alarm type display

Maintenance notification display** Japan Ex model: Maintenance notification 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

Detection mode
The buzzer blips twice and the productswitches to detection 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 detecting gas concentrations after turning on the power.
(Refer to ‘5-5 Performing fresh air adjustment in detection mode’.)NOTE If an abnormality is detected in the F sensor, [FAIL] will appear, and a sensor 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 detection 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. Detection will start with
the incorrect clock time and date.
 In modes other than detection 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 communicationmode.
 To enter communication mode, press the RESET/▼ and DISP/ESC buttons simultaneously while thedate 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.
 To enter communication mode, press the RESET/▼ and DISP/ESC buttons simultaneously while thebattery 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.
Maintenance notification display (Japan Ex model)
 With the Japan Ex model, the number of days remaining until one year (365 days) after the last

adjustment date is displayed. The buzzer sounds and [PLEASE CAL] is displayed on the LCD display 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 an ATEX/IECEx model(enabled by default), the adjustment expiration and number of days remaining until the adjustment
expiration are displayed. 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 to proceed
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 to proceed
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.

Full scale display
 Displays the full-scale value of the detection target gas.

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.

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 detected values over a periodof 60 seconds divided by 15. The value is refreshed every 60 seconds.

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5. Usage Instructions

5-4 Turning on the power

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 detected values overa 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 entering detection mode. Pressing the POWER/ENTER button
performs fresh air adjustment. To skip fresh air adjustment, press the
DISP/ESC button.
The product enters detection mode when automatic fresh air
adjustment ends.
For information on fresh air adjustment, refer to ‘5-5 Performing fresh
air adjustment in detection mode’.

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5. Usage Instructions

5-5 Performing fresh air adjustment in detection mode

5-5 Performing fresh air adjustment in detection mode
Perform fresh air adjustment before detecting gas concentrations.

WARNING When fresh air adjustment is performed in the surrounding atmosphere, check the air for cleanness
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.

CAUTION Perform fresh air adjustment in an environment that meets all of the following conditions:・ Under conditions of pressure, temperature, and humidity similar to those in the 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.
 If the fresh air adjustment during detection function is disabled, fresh air adjustment is not possible.
Modify the setting for the fresh air adjustment during detection function using the configuration program
which can be installed from the RIKEN KEIKI website.

1

Hold down the ▲/AIR button in detection 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 detection mode once fresh air adjustment has
been successfully completed.

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5. Usage Instructions

5-5 Performing fresh air adjustment in detection mode

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

5-6 Gas detection

5-6 Gas detection
DANGERGas outlet
 Toxic gas may be discharged from the gas outlet. Never breathe in this air.

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 (GASIN) or outlet (GAS OUT). Be careful to avoid excessive pressure during use.
 Do not connect the sampling probe directly to locations pressurized above atmospheric pressure. Doingso may result in damage to the internal piping.
 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 detection will not be possible if a battery low voltage alarm occurs. If the alarm occurs during use,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 detection.
 When detecting gas, connect the sampling probe provided to avoid the effects of airborne dust.
 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.
 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.
 Due to the way they operate, electrochemical type sensors may exhibit positive or negative sensitivity togases other than the detection target gas. In environments where interference gases are present, thereading may differ from the actual concentration of the detection target gas present. Note that false
alarms or M OVER alarms may be triggered, especially at high concentrations. (Refer to ‘12-4 List ofinterference gases for electrochemical type sensors’.) Due to the way the sensor operates, 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 turning on
the power before performing gas adjustment.

NOTE
 The gas concentration reading for ESF (electrochemical type) sensors is refreshed once every second.

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5. Usage Instructions

5-6 Gas detection

5-6-1 Detecting gas concentration
Detect gas concentrations in detection mode.
Hold the tip of the sampling probe close to the detection area.
The product sucks in the detection target gas, and the detection results are displayed on the LCD display.

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.

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5. Usage Instructions

5-6 Gas detection

5-6-2 Basic operating flow in detection mode
<Detection 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

5-6 Gas detection

5-6-3 Confirmation beep operation
The confirmation beep is a function that provides audible notification upon bump test expiration or after theoccurrence of a gas alarm when the product is operating normally.
The buzzer and LEDs operate at preset intervals while detection is in progress.

NOTE
 The confirmation beep operates only in detection mode and display mode.
 If a gas alarm has occurred, the gas alarm takes precedent.
 The confirmation beep operation can be modified using the configuration program which can beinstalled from the RIKEN KEIKI website.
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 span
adjustment has expired with the bump test expiration function enabled or when the bump
test has expired with the bump test expiration function enabled. 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.

 [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 forall 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 span adjustment has expired with thebump test expiration function enabled or when the bump test has expired with the bump
test expiration function enabled. The buzzer and LEDs continue to operate even when
the product is restarted until span adjustment or bump testing has been performed for allof the installed sensors.

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5. Usage Instructions

5-7 Recording gas concentration logs (snap logger)

5-7 Recording gas concentration logs (snap logger)
Up to 256 user-specified gas concentration values can be recorded while detection is in progress.
If more 256 data items are recorded, the oldest data is overwritten.
1

Press the ▲/AIR and DISP/ESC buttons
simultaneously on the detection mode screen.
The record number, station ID, record date and time, andcurrent 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 the detection
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 detection mode
screen, then repeat the process.
 The recorded data can be checked on the REC DATA DISP screen in display mode. (Refer to ‘6-3-2

Displaying the snap logger (gas concentration/alarm status)’.)57 / 140

5. Usage Instructions

5-8 Stopping the pump

5-8 Stopping the pump
1

Hold down the RESET/▼ button on the detection
mode screen (for approximately five seconds).
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 to restart.

The detection mode screen is displayed.

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5. Usage Instructions

5-9 Turning off the power

5-9 Turning off the power
CAUTION If the concentration display does not return to zero after detection ends, allow the product to stand inclean 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
is in 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

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

STEL

Displays the STEL value for 15-minute periodprior to the current time (or since the power was
turned on).
The STEL value refers to the sum of 15 piecesof average value data for detected values overa period of 60 seconds divided by 15.
The value is refreshed every 60 seconds.
[----] is displayed when the STEL value is aninvalid concentration.

TWA

Displays the TWA value for 8-hour period prior
to the current time (or since the power was
turned on).
The TWA value refers to the value obtained byintegrating average value data for detectedvalues over a period of 60 seconds and thendividing 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 aninvalid concentration.

6-3-1 Clearing the PEAK
value

USER ID

Set the user ID.

6-4-1 Setting the user ID

Set the station ID.

6-4-2 Setting the station
ID

STATION ID

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6. Settings (Display Mode)LCD display

6-1 Display mode items

Details

Reference

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

6-3-2 Displaying the snap
logger (gas concentration/
alarm status)

Displays the date on which gas adjustment was
performed for each sensor.
This is displayed for ATEX/IECEx models withthe adjustment expiration function 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

REC DATA DISPCAL DATABUMP DATA

DATE
Displays the current date and time andtemperature (°C).
The temperature is the product internal
temperature. This differs from the actual
ambient temperature.
GAS NAME
Displays the detection target gas names andcalibration gas names.

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

6-3-5 Displaying alarm
setpoints

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

6-4-3 Setting a Bluetooth®
device connection

BLUETOOTH

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6. Settings (Display Mode)LCD display

6-1 Display mode items

Details

Reference

BUZZER VOLUME

Selects the buzzer volume setting.

6-4-4 Setting the buzzer
volumeReturns the display language to English.
This appears if a language other than English
has been set with an ATEX/IECEx model.

6-4-5 Switching display
language to English(ATEX/IECEx model)

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

6-4-6 Switching display
language to Japanese(Japan Ex model)

LANGUAGE CHANGE
TO ENGLISH

TO JAPANESE

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6. Settings (Display Mode)

6-2 Switching to display mode

6-2 Switching to display mode1

Press the DISP/ESC button on the detection mode
screen.

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

・・・The product returns to detection mode once the display
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 todetection 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 detected since the power 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 configuration program which can beinstalled from the RIKEN KEIKI website will prevent clearing of the PEAK value. (The default setting isenabled.)1

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

2

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

3

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

The PEAK value is cleared and the display returns to thescreen 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 thedetection mode screen to display the REC DATADISP 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 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 button 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
 The adjustment records are displayed for ATEX/IECEx models with the adjustment expiration function

enabled (default setting is enabled).

1

Press the DISP/ESC button several times on thedetection 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.

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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 thedetection mode screen to display the BUMP DATA
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.

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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 thedetection 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] → …

4

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

To [FULL SCALE]

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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’.)69 / 140

6. Settings (Display Mode)

6-4 Display mode settings

6-4 Display mode settings
6-4-1 Setting the user ID
Set the user ID.
The user ID is used to identify individual users.
1

Press the DISP/ESC button several
times on the detection 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 configuration program which canbe installed from the RIKEN KEIKI website, this setting item will no longer appear in display mode. (Thedefault setting is enabled.)

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6. Settings (Display Mode)

6-4 Display mode settings

6-4-2 Setting the station ID
Set the station ID.
The station ID is used to identify detection points.
1

Press the DISP/ESC button several
times on the detection 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 configuration program which

can be installed from the RIKEN KEIKI website, 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

6-4-3 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
installed. The default setting is [OFF].

NOTE The Bluetooth® device connection setting is retained even when the power is turned off.
 The Bluetooth® function is an option (specified at the time of ordering).
 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 Bluetooth® function is disabled in [Disp mode item] of the configuration program which can beinstalled from the RIKEN KEIKI website, this setting item will no longer appear in display mode. (Thedefault setting is enabled.)

1

Press the DISP/ESC button several
times on the detection 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

6-4-4 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 setting function is disabled in [Disp mode item] of the configuration program which

can be installed from the RIKEN KEIKI website, 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 detection mode screen
to display the BUZZER VOLUME
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

6-4-5 Switching display language to English (ATEX/IECEx model)
Returns the display language to English.

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

does not appear in display mode in other cases.
 The display language setting is retained even when the power is turned off.
 The display language should be set using [LANGUAGE] in user mode. (Refer to ‘7-4-3 Setting thedisplay language’.) If the return to English function is disabled in [Disp mode item] of the configuration program which canbe installed from the RIKEN KEIKI website, this setting item will no longer appear in display mode. (Thedefault setting is enabled.)

1

Press the DISP/ESC button several
times on the detection 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

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

NOTE This can be set if a language other than Japanese has been set with a Japan Ex model. The item does

not appear in display mode in other cases.
 The display language setting is retained even when the power is turned off.
 The display language should be set using [LANGUAGE] in user mode. (Refer to ‘7-4-3 Setting thedisplay language’.) If the return to Japanese function is disabled in [Disp mode item] of the configuration program which

can be installed from the RIKEN KEIKI website, 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 detection 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 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 TEST

Performs a bump test.

8-3 Performing bumptests

Performs fresh air adjustment and span
adjustment.

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

GAS CAL

ALARM SETTINGBUZZER SETTINGDATE
The internal clock date (year, month, day) andtime (hours and minutes) can be set.

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7-4-2 Setting the date
and time

7. Settings (User Mode)LCD display

7-1 User mode display items

Details

Reference

LANGUAGE

Set the screen display language.

7-4-3 Setting thedisplay language

Displays the version information for the modules
mounted in the product.

7-4-4 Displaying
version information

VERSION

START MEASURE

Switches to the detection 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. Pressthe ▲/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. The password can be changed using the configuration program which
can be installed from the RIKEN KEIKI website.

<Switching from user mode to detection 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 detectionmode.

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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.
Detection target
gas

Resolution

ESF-B242

Ammonia (NH3)0.5 ppm

ESF-C930

Chlorine (Cl2)0.01 ppm

Ozone (O3)0.005 ppm

Sensor

ESF-B249

ESF-A24D(Japan Ex model)
ESF-B248(Japan Ex model)
ESF-B248X(ATEX/IECEx model)

Hydrogen chloride(HCl)
Hydrogen cyanide(HCN)
Hydrogen fluoride(HF)
Hydrogen fluoride(HF)

ESF-A24D

Phosphine (PH3)0.01 ppm

ESF-B248

Fluorine (F2)0.02 ppm

Silane (SiH4)

0.1 ppm

ESF-A24E2

ESF-A24D
ESF-A24D2
ESF-AA20
ESF-A24D
ESF-A24E2
ESF-B24A

Nitrogen monoxide(NO)
Nitrogen dioxide(NO2)
Sulfur dioxide (SO2)
Hydrogen bromide(HBr)
Chlorine trifluoride(ClF3)

ESF-A24D

Disilane (Si2H6)

Setting range
lower limit( ): recommended range

0.05 ppm
0.1 ppm
0.01 ppm
0.01 ppm

1 ppm
0.1 ppm
0.05 ppm
0.05 ppm
0.002 ppm
0.1 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)
0.9 ppm(5.0 ppm or more)
0.09 ppm(0.50 ppm or more)
0.09 ppm(0.50 ppm or more)
0.06 ppm(0.30 ppm or more)
0.18 ppm(1.00 ppm or more)
0.9 ppm(5.0 ppm or more)
6 ppm(25 ppm or more)
0.9 ppm(5.0 ppm or more)
0.35 ppm(2.00 ppm or more)
0.35 ppm(2.00 ppm or more)
0.018 ppm
(0.100 ppm or more)
0.9 ppm(5.0 ppm or more)

Setting range
upper limit
75.0 ppm
1.50 ppm
0.600 ppm
6.00 ppm
15.0 ppm
1.50 ppm
1.50 ppm
1.00 ppm
3.00 ppm
15.0 ppm
100 ppm
15.0 ppm
6.00 ppm
6.00 ppm
0.300 ppm
15.0 ppm

NOTE Set the alarm setpoints as follows: First alarm ≤ second alarm (first alarm ≥ second alarm for L-H alarmtype)
 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 [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 in increments

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].

NOTE
 The sensors installed in the product perform optimally with [H-HH]. Do not set to [L-LL] or [L-H].
 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].
The sensors installed in the product perform optimallywith [H-HH]. Do not set to [L-LL] or [L-H].

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7. Settings (User Mode)

5

7-3 Gas alarm settings

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

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 resetting to the default settings, press the
DISP/ESC button.

4

Press the POWER/ENTER button.
To cancel recording the default settings, 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 sound, andwarning sound all sound.) [ALL OFF]:The buzzer does not sound except for certain system abnormalities (ROM, RAM,and FRAM). (Button operation tone, alarm sound, and warning sound do not sound.) [BUTTON TONE OFF]: Only the button operation tone is disabled. (Alarm sound and warning sound bothsound.)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], then press
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 Setting the date and time
Set the internal clock date (year, month, day) and time (hours and minutes).
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 item of
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

7-4-3 Setting the display language
Set the screen display language. The default setting is [JAPANESE] for Japan Ex models. The default setting
is [ENGLISH] for ATEX/IECEx models.
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

7-4-4 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® function) version
 PID table version

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

calculated.
 While the R sensor and PID table version information screens are displayed, no R sensors or PID

sensors are installed in the product.

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 zeroafter drawing in clean air. If the reading is not zero,check to confirm that no miscellaneous gases arepresent, 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 filter is 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. 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 the table in ‘12-6 Warranty policy’.

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8. Maintenance

8-1 Maintenance intervals and items

 The dustproof and waterproof construction IP66/68 rating (IPx8 implies no water ingress whensubmerged underwater at a depth of 2 m for one hour) does not mean that the product is capable ofdetecting gas while or after being subjected to such environmental conditions. Be sure to remove any
dust or water before use.

<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 battery levels.

Concentration display
check

Check to confirm that the concentration reading is zero using zero gas.
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.
Parts are replaced if cracked or damaged.

Product operation check

Operates the buttons to check functions and parameters.

Consumable part
replacement

Replaces degraded components such as sensors and filters.

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8. Maintenance

8-2 Performing gas adjustment

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

CAUTION Due to the way the sensor operates, 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)<Gas supply method>
Connect the gas sampling bag as shown below to draw in the calibration gas, then adjust once the reading
has risen. For information on the calibration gas type and calibration gas introduction time, refer to<Recommended calibration gas concentration and introduction time>.
Gas inlet(GAS IN)

Sampling probeGas
samplingbag

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Gas outlet(GAS OUT)

8. Maintenance

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

Detection target gas

Calibration gas

ESF-B242
ESF-C930

Ammonia (NH3)
Chlorine (Cl2)

ESF-B249

Ozone (O3)

ESF-A24E2

Hydrogen chloride (HCl)

ESF-A24D(Japan Ex model)

Hydrogen cyanide (HCN)ESF-B248(Japan Ex model)

Hydrogen fluoride (HF)

ESF-B248X(ATEX/IECEx model)

Hydrogen fluoride (HF)

ESF-A24D

Phosphine (PH3)

ESF-B248

Fluorine (F2)

ESF-A24D
ESF-A24D2
ESF-AA20
ESF-A24D

Silane (SiH4)
Nitrogen monoxide (NO)
Nitrogen dioxide (NO2)
Sulfur dioxide (SO2)

ESF-A24E2

Hydrogen bromide (HBr)

ESF-B24A

Chlorine trifluoride (ClF3)

Ammonia (NH3)
Chlorine (Cl2)
Ozone (O3)orchlorine (Cl2)
Hydrogen chloride (HCl)Hydrogen cyanide(HCN)orphosphine (PH3)
Hydrogen fluoride (HF)orchlorine (Cl2)
Hydrogen fluoride (HF)orchlorine (Cl2)
Phosphine (PH3)
Fluorine (F2)orchlorine (Cl2)
Silane (SiH4)
Nitrogen monoxide (NO)
Nitrogen dioxide (NO2)
Sulfur dioxide (SO2)
Hydrogen bromide (HBr)orhydrogen chloride (HCl)
Chlorine trifluoride (ClF3)
orchlorine (Cl2)

ESF-A24D

Disilane (Si2H6)

Disilane (Si2H6)

Calibration gas
concentration
40 ppm0.80 ppm

Gas introductiontime
120 seconds
120 seconds

Depends on
calibration gas*1

120 seconds

3.2 ppm

120 seconds

Depends on
calibration gas*2

120 seconds

Depends on
calibration gas*3

120 seconds

Depends on
calibration gas*3

120 seconds

0.48 ppm

120 seconds

Depends on
calibration gas*4

120 seconds

8.0 ppm
40 ppm8.0 ppm
3.20 ppm

120 seconds
60 seconds
60 seconds
120 seconds

Depends on
calibration gas*5

120 seconds

Depends on
calibration gas*6

120 seconds

Depends on
calibration gas*7

120 seconds*1: The gas concentration for the ESF-B249 (O3) differs depending on the calibration gas used. Perform gas adjustment using
either of the 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 for the ESF-A24D (HCN) differs depending on the calibration gas used. Perform gas adjustment using
either of the following gas concentrations:
When using hydrogen cyanide (HCN) (actual gas):
8 ppm
When using phosphine (PH3) (replacement gas):
8 ÷ (conversion factor) ppm*3: The gas concentration for the ESF-B248 (HF) and ESF-B248X (HF) differs depending on the calibration gas used. Perform
gas adjustment using either of the following gas concentrations:
When using hydrogen fluoride (HF) (actual gas):0.80 ppm
When using chlorine (Cl2) (replacement gas):0.80 ÷ (conversion factor) ppm*4: The gas concentration for the ESF-B248 (F2) differs depending on the calibration gas used. Perform gas adjustment using
either of the following gas concentrations:1.60 ppm
When using fluorine (F2) (actual gas):
When using chlorine (Cl2) (replacement gas):1.60 ÷ (conversion factor) ppm*5: The gas concentration for the ESF-A24E2 (HBr) differs depending on the calibration gas used. Perform gas adjustment using
either of the following gas concentrations:
When using hydrogen bromide (HBr) (actual gas):
3.20 ppm
When using hydrogen chloride (HCl) (replacement gas): 3.20 ÷ (conversion factor) ppm*6: The gas concentration for the ESF-B24A (ClF3) differs depending on the calibration gas used. Perform gas adjustment using
either of the following gas concentrations:
When using chlorine trifluoride (ClF3) (actual gas):0.16 ppm
When using chlorine (Cl2) (replacement gas):0.16 ÷ (conversion factor) ppm*7: The gas concentration for the ESF-A24D (Si2H6) differs depending on the calibration gas used. Perform gas adjustment using
either of the following gas concentrations:
When using disilane (Si2H6) (actual gas):
8.0 ppm
When using silane (SiH4) (replacement gas):
8.0 ÷ (conversion factor) ppm

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8. Maintenance

8-2 Performing gas adjustment

NOTE
 The recommended calibration gas concentrations are the same as above for the bump test, too.
 The recommended calibration gas concentrations are shown here. If the calibration gas concentration

used differs, alter the concentration setting and perform gas adjustment.

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 toxic gases. 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 are used.
 Perform gas adjustment in an environment as close as possible to the gas detection environment.
 Calibration gases include hazardous toxic gases. Always perform adjustment in an exhaust booth orrecover 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 using a replacement gas, set the calibration gas concentration to the replacement gas
concentration  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 ‘12-4 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][SPAN CAL][CYLINDER A] to [CYLINDER F][START MEASURE][SETTING CAL-P][CYL SETTING][SPAN GAS SELECT] (when a sensor allowing adjustment using replacement gas 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], then press

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.
 The product can enter detection 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 modeends, and the product enters detection mode after performing the same operation as when the power isturned on.

WARNING Return to detection mode manually once gas adjustment ends. The product does not returnautomatically to detection mode from user mode.

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8. Maintenance

8-2 Performing gas adjustment

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

The display returns to the screen in Step 2.

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8. Maintenance

8-2 Performing gas adjustment

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, thesensor is likely to be faulty. Contact RIKEN KEIKI.

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8. Maintenance

8-2 Performing gas adjustment

8-2-3 Setting span adjustment
The cylinders, calibration gas concentration, and calibration gas can be set for span adjustment.

<Set 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.
Cylinders A to F can be set.
The default cylinder settings are as follows:
Sensor slot
F1
F2
F3

Default cylinder setting
D
E
C

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 thecylinder, 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.

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8. Maintenance

8-2 Performing gas adjustment

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

<Set 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.

Sensor

Detection target gas

Resolution

Setting range
lower limit

Setting range
upper limit
75.0 ppm

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-A24D(Japan Ex model)

Hydrogen cyanide (HCN)

0.1 ppm

0.9 ppm

15.0 ppm

ESF-B248(Japan Ex model)

Hydrogen fluoride (HF)

0.01 ppm

0.09 ppm

1.50 ppm

ESF-B248X(ATEX/IECEx model)

Hydrogen fluoride (HF)

0.01 ppm

0.09 ppm

1.50 ppm

ESF-A24D

Phosphine (PH3)0.01 ppm

0.06 ppm

1.00 ppm

ESF-B248

Fluorine (F2)0.02 ppm

0.18 ppm

3.00 ppm

ESF-A24D

Silane (SiH4)

0.1 ppm

0.9 ppm

15.0 ppm

ESF-A24D2

Nitrogen monoxide (NO)

1 ppm

6 ppm

100 ppm

ESF-AA20

Nitrogen dioxide (NO2)0.1 ppm

0.9 ppm

15.0 ppm
6.00 ppm

ESF-A24D

Sulfur dioxide (SO2)0.05 ppm

0.35 ppm

ESF-A24E2

Hydrogen bromide (HBr)

0.05 ppm

0.35 ppm

6.00 ppm

ESF-B24A

Chlorine trifluoride (ClF3)

0.002 ppm

0.018 ppm

0.300 ppm

ESF-A24D

Disilane (Si2H6)

0.1 ppm

0.9 ppm

15.0 ppm

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[SETTING CAL-P], then press the POWER/ENTER
button.

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8. Maintenance

8-2 Performing gas adjustment

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.

[END] appears, and 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.
 Span adjustment should be performed using the calibration gas concentration indicated in ‘8-2-1

Preparation for gas adjustment’.

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8. Maintenance

8-2 Performing gas adjustment

8-2-4 Performing span adjustment
Gas adjustment can be performed for gas types selected from cylinders A to F. Prepare the gases for gas
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 ‘12-4 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.
 The calibration gas concentration, cylinders, and calibration gas can be set for span adjustment. (Referto ‘8-2-3 Setting span adjustment’.) When the automatic start after successful adjustment function is enabled and the cylinder setting is A

only, detection will start automatically after a successful span adjustment.
The automatic start after successful adjustment function setting can be changed using the configuration
program which can be installed from the RIKEN KEIKI website.

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 or 120 seconds, then press the
POWER/ENTER button.
For information on the gas introduction time, refer to‘8-2-1 Preparation for gas adjustment’.

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.
 The product can enter detection 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 detection 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.
 When the automatic start after successful bump test function is enabled and the cylinder setting is A
only, detection will start automatically after a successful bump test.
The automatic start after successful bump test function setting can be changed using the configuration
program which can be installed from the RIKEN KEIKI website.
 The default settings for bump test execution conditions are as follows:・ Test time: 30 seconds
・ Tolerance (%): 50 %・ Adjustment time: 90 seconds
・ Bump adjustment: ON
 The following bump test execution conditions can be changed using the configuration program which
can be installed from the RIKEN KEIKI website.
・ Tolerance (%): Threshold for checking the calibration gas
Calibration concentration ± (Calibration concentration  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 event of
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 end.
Press the ▲/AIR or RESET/▼ button to toggle the result
display.
・ Bump test and gas adjustment results
The bump test result is displayed on the left side of theconcentration display area, and the gas adjustment
result is 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 detection mode manually once the bump test ends. The product does not return automaticallyto detection 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 thedetection 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 periodically.

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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>
Name

Recommended
maintenanceinterval

Recommended
replacement
interval

Quantity(per unit)

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

6 months

6 months to
1 year

×1

Internal filter
Part No.: 4181 5452 30

Dust filter (internal filter)*

6 months

6 months to
1 year

×1

Internal filter
Part No.: 4777 4495 90

Tubes (internal piping)*-

3 to 8 years

1 set

Rubber seals*-

3 to 6 years

1 set

6 months

1 to 2 years

×1

Lithium ion battery unit (BUL-9000)-

500 charge/
discharge
cycles×1

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

AA alkaline batteries

-

-

×6

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

Pump unit (RP-11)**

Remarks

A function check by a qualified service engineer is required after parts replacement. To ensure safety and the stable operationof the product, request checking by a qualified service engineer. Contact RIKEN KEIKI.

109 / 140

8. Maintenance

8-6 Parts replacement<Sensor replacement intervals>
Sensor model

Detection target gas

Display range

Recommended
sensorreplacement
interval

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-A24D(Japan Ex model)

Hydrogen cyanide (HCN)

0 – 15.0 ppm

3 years

ESF-B248(Japan Ex model)

Hydrogen fluoride (HF)

0 – 1.50 ppm

1 year

ESF-B248X(ATEX/IECEx model)

Hydrogen fluoride (HF)

0 – 1.50 ppm

1 yearESF-A24D

Phosphine (PH3)

0 – 1.00 ppm

3 years

ESF-B248

Fluorine (F2)

0 – 3.00 ppm

1 yearESF-A24D

Silane (SiH4)

0 – 15.0 ppm

3 years

ESF-A24D2

Nitrogen monoxide (NO)0 – 100 ppm

3 years

ESF-AA20

Nitrogen dioxide (NO2)

0 – 15.0 ppm

3 years
3 years

ESF-A24D

Sulfur dioxide (SO2)

0 – 6.00 ppm

ESF-A24E2

Hydrogen bromide (HBr)

0 – 6.00 ppm

3 years

ESF-B24A

Chlorine trifluoride (ClF3)

0 – 0.300 ppm

3 years

ESF-A24D

Disilane (Si2H6)0 – 15.0 ppm

3 years

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.

110 / 140

8. Maintenance

8-6 Parts replacement

8-6-2 Replacing the sampling probe dust filter
The sampling 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 connector on the sampling probe todetach it.
Connector

2

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

3

Rotate the connector to reattach it.
Rotate only by hand. Overtightening with a tool may
damage the plastic part.

NOTE
 Do not use filters other than those specified by RIKEN KEIKI.
 For more information on the replacement filters, refer to ‘8-6-1 Periodic replacement parts’.

111 / 140

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 and acceleratebattery deterioration.
 If the dry battery unit is stored on its own, remove the batteries before storing.

112 / 140

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 of storage.

CAUTION After an extended period of storage, 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 in blindness.
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.

113 / 140

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.

114 / 140

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 detection is possible in this state,
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
・ Ambient conditions significantly
outside the operating temperature
range

Contact RIKEN KEIKI.

083

・ Bluetooth® fault
・ Effects of abnormal noise

Gas detection 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.
115 / 140

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.

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.

Supply 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.

116 / 140

10. Troubleshooting

Symptom

A sensor abnormality is
indicated.

10-1 Product abnormalities

Cause

Action・ 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.

Indicates that more than one year has
Contact RIKEN KEIKI to request
elapsed since the last adjustment date.
maintenance.
(Japan Ex models only)[CAL DATE PAST] isdisplayed.

Indicates that the set gas adjustment
expiration date has passed.
(ATEX/IECEx models only)

Either perform gas adjustment yourself orcontact RIKEN KEIKI to request
maintenance.

[BUMP DATE PAST] isdisplayed.

Indicates that the set bump expiration
date has passed.

Perform a bump test.

117 / 140

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.

Dust filter clogging

Replace the dust filter.

Sampling probe bent or clogged

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.

118 / 140

11. Product Specifications

11-1 Main unit specifications

11

Product Specifications
11-1 Main unit specifications
Item
Concentration display
Detection target gas

Detection method
Suction flow rate
Display items
Display languages

Buzzer volume
Gas alarm indication
Gas alarm patternFault alarm/self-diagnosis
Fault alarm indication
Fault alarm pattern
Communication
specifications
Power source
Continuous operatingtime
Operatingtemperature range
Operating humidity
range
Operating pressure
range
Construction
Explosion-proof
construction
Explosion-proof classSpecifications
LCD digital (full dot)
Toxic gas (ammonia (NH3), chlorine (Cl2), ozone (O3), hydrogen chloride (HCl),hydrogen cyanide (HCN)*1, hydrogen fluoride (HF), fluorine (F2), silane (SiH4),
nitrogen monoxide (NO), nitrogen dioxide (NO2), sulfur dioxide (SO2), hydrogen
bromide (HBr), chlorine trifluoride (ClF3), disilane (Si2H6))
Pump suction type
Minimum 0.75 L/min (open flow rate)
Clock, battery level, operation status
Japanese, English, Korean, Chinese (simplified), Chinese (traditional), Vietnamese,
Italian, Spanish, Slovak, Czech, German, Turkish, French, Portuguese, Polish,
RussianApprox. 95 dB (mean value at 30 cm from source)
Lamp flashing, continuous modulating buzzer sounding, gas concentration readout
blinking
Self-latching, auto-reset
Flow rate abnormality, system abnormality, sensor abnormality, low battery voltage,
adjustment failure, clock abnormality
Lamp flashing, intermittent buzzer sounding, detail display
Self-latchingUSB 2.0 Type-C (for data logger/setting), Bluetooth® 4.2 (Bluetooth® Low Energy)
Dedicated lithium ion battery unit (BUL-9000) or
dedicated dry battery unit (AA alkaline batteries  6) (BUD-9000)*2
Lithium ion battery unit: Approx. 60 hours
Dry battery unit: Approx. 30 hours
At 25 °C, no alarm, no lighting-20 °C to +50 °C (no sudden fluctuations)
May vary depending on the sensors installed. (Refer to ‘11-2 Sensor specifications’.)
20 to 90 %RH (no condensation)
May vary depending on the sensors installed. (Refer to ‘11-2 Sensor specifications’.)
80 kPa to 120 kPa (80 kPa to 110 kPa for explosion-proof range)
Dustproof and waterproof construction equivalent to IP66/68*3, drop resistant to 1.5 m
Japan Ex (explosion-proof electrical equipment type certified) models: Intrinsicallysafe explosion-proof enclosure
ATEX/IECEx models: Inherently safe explosion-proof enclosure
Japan Ex (explosion-proof electrical equipment type certified) models: Ex ia IIC T4 Ga
II 1 G Ex ia IIC T4 Ga
ATEX models*4:
IECEx models*4:
Ex ia IIC T4 Ga

119 / 140

11. Product Specifications

11-1 Main unit specifications

Item
Certifications
External dimensions
WeightSpecifications

Approx. 158 (W)  85 (H)  132 (D) mm
Approx. 1.1 kg*1: Not included in the ATEX/IECEx model lineup. Due to export restrictions, this cannot be installed in products exported outside
Japan.
*2: Japan Ex models can use six Toshiba LR6 batteries.
ATEX/IECEx models can use either six Toshiba LR6 or six Duracell MN1500 batteries.
*3: IPx8 implies no water ingress when submerged underwater at a depth of 2 m for one hour.
*4: As follows for models with the dry battery unit using Duracell (MN1500) batteries:-20 °C to +40 °C: T4, -20 °C to +50 °C: T3

120 / 140

11. Product Specifications

11-2 Sensor specifications

11-2 Sensor specifications
Item

Detection
target gas

Sensor model
Explosion-proof
specifications
Display range
Detection range
Resolution
First alarm
Second alarm
Alarm
TWA
setpoints
STEL
OVER
Operating temperature
range
Operating humidity
range
Display accuracy (foridentical 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
Operating temperature
range
Operating humidity
range
Display accuracy (foridentical conditions)
Response time (T90)*

Ammonia
NH3

Chlorine
Cl2

Ozone
O3

ESF-B242

ESF-C930

ESF-B249

Japan Ex and ATEX/IECEx Japan Ex and ATEX/IECEx 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

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

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

0 °C to +50 °C

10 °C to +40 °C

30 to 80 %RH

30 to 80 %RH

30 to 80 %RH

Within ±7.5 ppm

Within ±0.15 ppm

Within ±0.06 ppm

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

Hydrogen cyanide
HCN*
ESF-A24D

0 °C to +40 °C-20 °C to +50 °C

20 to 90 %RH

20 to 90 %RH

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

Within ±0.6 ppm

Within ±1.5 ppm

46 seconds (typical)

33 seconds (typical)

Not included in the ATEX/IECEx model lineup. Due to export restrictions, this cannot be installed
in products exported outside Japan.

121 / 140

11. Product Specifications

11-2 Sensor specifications

Hydrogenfluoride
HF*1

Hydrogenfluoride
HF*2

Sensor model
Explosion-proof
specifications

ESF-B248

ESF-B248X

Japan ExATEX/IECEx

Display range
Detection range
Resolution
First alarm
Second alarm
Alarm
TWA
setpoints
STEL
OVER
Operating temperature
range
Operating humidity
range
Display accuracy (foridentical conditions)0 – 1.50 ppm
0 – 1.50 ppm
0.01 ppm
0.50 ppm
1.00 ppm
0.50 ppm
OFF1.50 ppm

Item

Detection
target gas

Response time (T90)

Phosphine
PH3

Fluorine
F2

ESF-A24D
Japan Ex and
ATEX/IECEx

ESF-B248
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
OFF1.50 ppm

0 – 1.00 ppm
0 – 1.00 ppm
0.01 ppm
0.30 ppm
0.60 ppm
OFFOFF
1.00 ppm

0 – 3.00 ppm
0 – 3.00 ppm
0.02 ppm
1.00 ppm
2.00 ppm
OFFOFF
3.00 ppm

0 °C to +40 °C

0 °C to +40 °C-20 °C to +50 °C

0 °C to +40 °C

30 to 80 %RH

30 to 80 %RH

20 to 90 %RH

30 to 80 %RH

Within ±0.15 ppm

Within ±0.15 ppm

Within ±0.10 ppm

Within ±0.30 ppm

85 seconds(typical)85 seconds(typical)

12 seconds(typical)

70 seconds(typical)*1: Due to export restrictions, this cannot be installed in products exported outside Japan.
*2: Due to export restrictions, concentrations of 0.0 – 0.4 ppm are indicated as 0.0 ppm.

SilaneSiH4

NitrogenmonoxideNO

Nitrogen dioxide
NO2

Sulfur dioxide
SO2

Sensor model
Explosion-proof
specifications

ESF-A24D
Japan Ex and
ATEX/IECEx

ESF-A24D2
Japan Ex and
ATEX/IECEx

ESF-AA20
Japan Ex and
ATEX/IECEx

ESF-A24D
Japan Ex and
ATEX/IECEx

Display range
Detection range
Resolution
First alarm
Second alarm
Alarm
TWA
setpoints
STEL
OVER
Operating temperature
range
Operating humidity
range
Display accuracy (foridentical conditions)0 – 15.0 ppm
0 – 15.0 ppm
0.1 ppm
5.0 ppm
10.0 ppm
5.0 ppm
OFF15.0 ppm

0 – 100 ppm
0 – 100 ppm
1 ppm
25 ppm50 ppm25 ppmOFF
100 ppm0 – 15.0 ppm
0 – 15.0 ppm
0.1 ppm
5.0 ppm
10.0 ppm
OFFOFF
15.0 ppm

0 – 6.00 ppm
0 – 6.00 ppm
0.05 ppm
2.00 ppm
4.00 ppm
OFFOFF
6.00 ppm-20 °C to +50 °C-20 °C to +50 °C-20 °C to +50 °C-20 °C to +50 °C

20 to 90 %RH

20 to 90 %RH

20 to 90 %RH

20 to 90 %RH

Within ±1.5 ppm

Within ±10 ppm

Within ±1.5 ppm

Within ±0.60 ppm

7 seconds (typical)

7 seconds (typical)

14 seconds(typical)

11 seconds(typical)

Item

Detection
target gas

Response time (T90)122 / 140

11. Product Specifications

11-2 Sensor specifications

Hydrogenbromide
HBr

Chlorine
trifluoride
ClF3

Disilane
Si2H6

Sensor model
Explosion-proof
specifications

ESF-A24E2
Japan Ex and
ATEX/IECEx

ESF-B24A
Japan Ex and
ATEX/IECEx

ESF-A24D
Japan Ex and
ATEX/IECEx

Display range
Detection range
Resolution
First alarm
Second alarm
Alarm
TWA
setpoints
STEL
OVER
Operating temperature
range
Operating humidity
range
Display accuracy (foridentical conditions)0 – 6.00 ppm
0 – 6.00 ppm
0.05 ppm
2.00 ppm
4.00 ppm
OFFOFF
6.00 ppm

0 – 0.300 ppm
0 – 0.300 ppm
0.002 ppm
0.100 ppm
0.200 ppm
OFFOFF
0.300 ppm

0 – 15.0 ppm
0 – 15.0 ppm
0.1 ppm
5.0 ppm
10.0 ppm
OFFOFF
15.0 ppm

0 °C to +40 °C

0 °C to +40 °C-20 °C to +50 °C

20 to 90 %RH

30 to 80 %RH

20 to 90 %RH

Within ±0.60 ppm

Within ±0.030 ppm

Within ±1.5 ppm

77 seconds(typical)

56 seconds(typical)

7 seconds (typical)

Item

Detection
target gas

Response time (T90)

CAUTION Never disassemble the sensor. Electrochemical type sensors contain hazardous electrolyte.
 Indication accuracy may be reduced when used in high-humidity or low-humidity environments.
 Indication accuracy may be reduced if the temperature varies significantly after adjustment at a high or
low temperature.
 The reading may fluctuate if the temperature, humidity, or pressure varies suddenly.
 Sensors will not operate if installed in the wrong direction. Forcibly installing sensors may damage thesensors and main unit. This may also cause the sensors to fail.

NOTE The alarm setpoints (including “OFF”) indicated in the tables above can be changed. (Refer to ‘7-3-1

Setting alarm setpoints.’)

123 / 140

12. Appendix

12-1 Data logger function

12

Appendix12-1 Data logger function
The product is equipped with a data logger function that records detection 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 detected concentration from the start of detection 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 arerecorded; if the alarm type is L-H, the average value, minimum value, and minimum value detection time arerecorded,
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

20 hours

30 hours

60 hours

180 hours

300 hours

600 hours

The standard interval is 5 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 detected 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.

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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. To enter communication mode, press the
RESET/▼ and DISP/ESC buttons simultaneously while the date and time or battery voltage isdisplayed at startup.
 A fault alarm will be triggered if no communication connection can be confirmed for a preset duration incommunication mode. If this occurs, either repeat the communication connection or turn off the power
for the product.

125 / 140

12. Appendix

12-2 Zero suppression function

12-2 Zero suppression function
Gas sensors are affected by environmental factors such as temperature and humidity. They are also
substantially affected by the interference of the detection target gas. Environmental and interference effects
may cause the product reading to fluctuate around zero.
The zero suppression function is designed to suppress notifications of reading fluctuations around zero. The
function suppresses reading fluctuations below the set value and displays zero instead.

NOTE The default setting is enabled. To disable the setting, use the configuration program which can beinstalled from the RIKEN KEIKI website 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 detection mode and displaymode.
 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 detection 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:
Sensor
ESF-B242
ESF-C930
ESF-B249
ESF-A24E2
ESF-A24D(Japan Ex model)
ESF-B248(Japan Ex model)
ESF-B248X(ATEX/IECEx model)
ESF-A24D
ESF-B248
ESF-A24D
ESF-A24D2
ESF-AA20
ESF-A24D
ESF-A24E2
ESF-B24A
ESF-A24D

Negative
Negative
suppression suppression
value
type
-5.0 ppm
Cut-off-0.08 ppm
Cut-off-0.030 ppm
Cut-off

Detection target
gas

Suppression
value

Suppression
type

Ammonia (NH3)
Chlorine (Cl2)
Ozone (O3)
Hydrogen chloride(HCl)
Hydrogen cyanide(HCN)
Hydrogen fluoride(HF)
Hydrogen fluoride(HF)
Phosphine (PH3)
Fluorine (F2)Silane (SiH4)
Nitrogen monoxide(NO)
Nitrogen dioxide(NO2)
Sulfur dioxide (SO2)
Hydrogen bromide(HBr)
Chlorine trifluoride(ClF3)
Disilane (Si2H6)

10.0 ppm
0.09 ppm
0.035 ppm

Cut-off
Cut-off
Cut-off

0.35 ppm

Cut-off-0.30 ppm

Cut-off

0.9 ppm

Cut-off-0.8 ppm

Cut-off

0.09 ppm

Cut-off-0.08 ppm

Cut-off

0.09 ppm

Cut-off-0.08 ppm

Cut-off

0.06 ppm
0.18 ppm
0.9 ppm

Cut-off
Cut-off
Cut-off-0.05 ppm
-0.16 ppm
-0.8 ppm

Cut-off
Cut-off
Cut-off

6 ppm

Cut-off-5 ppmCut-off

0.9 ppm

Cut-off-0.8 ppm

Cut-off

0.35 ppm

Cut-off-0.30 ppm

Cut-off

0.35 ppm

Cut-off-0.30 ppm

Cut-off

0.018 ppm

Cut-off-0.016 ppm

Cut-off

0.9 ppm

Cut-off-0.8 ppm

Cut-off

126 / 140

12. Appendix

12-3 Zero follower function

12-3 Zero follower function
The zero points for the sensors used in the product may fluctuate 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.
ESF 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 configuration program which can beinstalled from the RIKEN KEIKI website 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.

127 / 140

12. Appendix

12-4 List of interference gases for electrochemical type sensors

12-4 List of interference gases for electrochemical type sensors
The following tables list the interference gases for electrochemical type toxic gas sensors.
The values indicated here are representative values detected 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 astemperature and humidity will affect susceptibility to interference. These figures may differ from the actual
values. Use them as reference values to identify the presence of interference gases and the degree ofinterference influence.

CAUTION A false alarm may occur with detection performed in an environment where strong interference gases
are present.

<ESF-B242 (NH3)>
Gas name

Chemical formula

ChlorineCl2

Gas concentration
1.6 ppm

ReadingOzone

O3

2.2 ppm

4.5 ppm

Hydrogen chloride

HCl

3.2 ppm-2.6 ppm

Hydrogen cyanideHCN

7.8 ppm

1.0 ppm

Hydrogen fluoride

HF

6.0 ppm-5.0 ppm

Phosphine

PH3

2.6 ppm

0.0 ppm

Fluorine

F2

1.6 ppm-1.0 ppm-1.0 ppm-0.8 ppm

SilaneSiH4

7.1 ppm

Nitrogen monoxideNO101 ppm

0.0 ppm

Nitrogen dioxide

NO2

40 ppm-21.2 ppm
-5.3 ppm

Sulfur dioxide

SO2

10 ppmHydrogen bromide

HBr

15.0 ppm-2.0 ppm

Chlorine trifluoride

ClF3

1.6 ppm-5.0 ppm

Disilane

Si2H6

14.8 ppm

0.0 ppm

128 / 140

12. Appendix

12-4 List of interference gases for electrochemical type sensors<ESF-C930 (Cl2)>
Gas name

Chemical formula

Ammonia

NH3

Gas concentration
75 ppmReading-0.02 ppm

Ozone

O3

2.4 ppm

0.24 ppm

Hydrogen chloride

HCl

15 ppm

0.02 ppm

Hydrogen cyanideHCN

7.8 ppm-0.01 ppm

Hydrogen fluoride

HF

0.8 ppm-0.02 ppm

PhosphinePH3

2.5 ppm

0.00 ppm

Fluorine

F2

1.6 ppm

0.36 ppm

SilaneSiH4

7.1 ppm-0.02 ppm
-0.02 ppm

Nitrogen monoxideNO

10 ppmNitrogen dioxide

NO2

7.6 ppm

0.10 ppm

Sulfur dioxideSO2

3.2 ppm-0.03 ppm
-0.02 ppm

Hydrogen bromide

HBr

15 ppmChlorine trifluoride

ClF3

0.16 ppm

0.08 ppm

Disilane

Si2H6

15 ppm

-0.02 ppm

<ESF-B249 (O3)>
Gas name

Chemical formula

AmmoniaNH3

75 ppm-0.06 ppm

ChlorineCl2

1.5 ppm

2.01 ppm

Hydrogen chloride

HCl

15 ppm

0.58 ppm

Hydrogen cyanideHCN

5.1 ppm-0.06 ppm

Hydrogen fluoride

HF

6.0 ppm

0.22 ppm

PhosphinePH3

2.5 ppm

0.00 ppm

Fluorine

F2

0.32 ppm

0.15 ppm

SilaneSiH430 ppm

0.00 ppm

Nitrogen monoxideNO

100 ppm

0.02 ppm

Nitrogen dioxide

NO2

40 ppm0.65 ppm

Sulfur dioxide

SO20.50 ppm

0.01 ppm

Hydrogen bromide

HBr

3.2 ppm

0.08 ppm

Chlorine trifluoride

ClF3

0.16 ppm

0.10 ppm

Disilane

Si2H6

7.2 ppm

0.00 ppm

129 / 140

Gas concentration

Reading12. Appendix

12-4 List of interference gases for electrochemical type sensors<ESF-A24E2 (HCl)>
Gas name

Chemical formula

Gas concentration

Reading

AmmoniaNH3

400 ppm-0.19 ppm

ChlorineCl2

2.5 ppm

0.40 ppm

Ozone

O3

2.4 ppm-0.05 ppm

Hydrogen cyanide

HCN

6.9 ppm

0.03 ppm

Hydrogen fluoride

HF

6.0 ppm

0.39 ppm

PhosphinePH30.50 ppm

0.89 ppm

Fluorine

F2

6.0 ppm-0.16 ppm
0.08 ppm

SilaneSiH4

7.1 ppm

Nitrogen monoxideNO

10 ppm0.51 ppm

Nitrogen dioxide

NO2

7.6 ppm

0.21 ppm

Sulfur dioxide

SO2

10 ppm0.34 ppm

Hydrogen bromide

HBr

3.2 ppm

2.67 ppm

Chlorine trifluoride

ClF3

0.16 ppm

0.02 ppm

Disilane

Si2H6

15 ppm

1.57 ppm<ESF-A24D (HCN) Japan Ex model>
Gas name

Chemical formula

Gas concentration

AmmoniaNH3

400 ppm

Reading
0.3 ppm

ChlorineCl2

1.5 ppm-2.9 ppm

Ozone

O3

1.8 ppm-8.5 ppm

Hydrogen chloride

HCl

15 ppm16.1 ppm

Hydrogen fluoride

HF

9.0 ppm

0.5 ppm

Phosphine

PH3

1.0 ppm

14.0 ppm

Fluorine

F2

1.6 ppm-0.3 ppm

SilaneSiH4

14.4 ppm

168.1 ppm

Nitrogen monoxideNO101 ppm-3.1 ppm

Nitrogen dioxideNO2

15.0 ppm-66.5 ppm
20.4 ppm

Sulfur dioxide

SO2

6.0 ppm

Hydrogen bromide

HBr

6.0 ppm

1.0 ppm

Chlorine trifluoride

ClF3

0.16 ppm

0.2 ppm

Disilane

Si2H6

14.8 ppm

194.9 ppm

130 / 140

12. Appendix

12-4 List of interference gases for electrochemical type sensors<ESF-B248 (HF) Japan Ex model>
Gas name

Chemical formula

Ammonia

NH3

Gas concentration
75 ppmReading-0.06 ppm

Chlorine

Cl2

0.8 ppm

1.14 ppm

Ozone

O3

0.32 ppm

0.06 ppm

Hydrogen chloride

HCl

3.2 ppm

2.46 ppm

Hydrogen cyanideHCN

7.4 ppm

0.00 ppm

Phosphine

PH3

1.0 ppm

0.00 ppm

Fluorine

F2

1.6 ppm

1.61 ppm

SilaneSiH4

20 ppm

0.00 ppm

Nitrogen monoxideNO

100 ppm

0.00 ppm

Nitrogen dioxide

NO2

15 ppm

0.21 ppm

Sulfur dioxide

SO20.50 ppm

0.00 ppm

Hydrogen bromide

HBr

3.2 ppm

1.87 ppm

Chlorine trifluoride

ClF3

1.6 ppm

0.19 ppm

Disilane

Si2H6

7.2 ppm

0.00 ppm<ESF-B248X (HF) ATEX/IECEx model>
Gas name

Chemical formula

AmmoniaNH3

75 ppm-0.06 ppm

Chlorine

Cl2

0.8 ppm

1.14 ppm

Ozone

O3

0.32 ppm

0.06 ppm

Hydrogen chloride

HCl

3.2 ppm

2.46 ppm

Hydrogen cyanideHCN

7.4 ppm

0.00 ppm

Phosphine

PH3

1.0 ppm

0.00 ppm

Fluorine

F2

1.6 ppm

1.61 ppm

SilaneSiH4

20 ppm

0.00 ppm

Nitrogen monoxideNO

100 ppm

0.00 ppm

Nitrogen dioxide

NO2

15 ppm

0.21 ppm

Sulfur dioxide

SO20.50 ppm

0.00 ppm

Hydrogen bromide

HBr

3.2 ppm

1.87 ppm

Chlorine trifluoride

ClF3

1.6 ppm

0.19 ppm

Disilane

Si2H6

7.2 ppm

0.00 ppm

131 / 140

Gas concentration

Reading12. Appendix

12-4 List of interference gases for electrochemical type sensors<ESF-A24D (PH3)>
Gas name

Chemical formula

Gas concentration

AmmoniaNH3

250 ppm

Reading
0.00 ppm

Chlorine

Cl2

10 ppm-1.68 ppm
-0.96 ppm

Ozone

O3

3.1 ppm

Hydrogen chloride

HCl

15 ppm0.80 ppm

Hydrogen cyanideHCN

7.1 ppm

0.77 ppm

Hydrogen fluoride

HF

6.0 ppm

0.02 ppm

Fluorine

F2

10 ppm-0.30 ppm

SilaneSiH4

1.2 ppm

0.94 ppm

Nitrogen monoxideNO

100 ppm-0.08 ppm

Nitrogen dioxide

NO2

7.6 ppm-2.29 ppm

Sulfur dioxide

SO2

1.0 ppm

0.23 ppm

Hydrogen bromide

HBr

15 ppm0.77 ppm

Chlorine trifluoride

ClF3

0.16 ppm

0.08 ppm

Disilane

Si2H6

0.60 ppm

0.61 ppm

Gas name

Chemical formula

Gas concentration

Reading

AmmoniaNH3

75 ppm-0.06 ppm

Chlorine

Cl2

0.8 ppm

1.14 ppm

Ozone

O3

0.32 ppm

0.06 ppm

Hydrogen chloride

HCl

3.2 ppm

2.45 ppm

Hydrogen cyanideHCN

7.4 ppm

0.00 ppm

Hydrogen fluoride

HF

0.80 ppm

0.80 ppm

Phosphine

PH3

1.0 ppm

0.00 ppm

SilaneSiH4

20 ppm

0.00 ppm

Nitrogen monoxideNO

100 ppm

0.00 ppm

Nitrogen dioxide

NO2

15 ppm

0.21 ppm

Sulfur dioxide

SO20.50 ppm

0.00 ppm

Hydrogen bromide

HBr

3.2 ppm

1.86 ppm

Chlorine trifluoride

ClF3

1.6 ppm

0.19 ppm

Disilane

Si2H6

7.2 ppm

0.00 ppm<ESF-B248 (F2)>132 / 140

12. Appendix

12-4 List of interference gases for electrochemical type sensors<ESF-A24D (SiH4)>
Gas name

Chemical formula

Gas concentration

AmmoniaNH3

250 ppm

Reading
0.0 ppm

Chlorine

Cl2

10 ppm-2.1 ppm-1.2 ppm

Ozone

O3

3.1 ppm

Hydrogen chloride

HCl

15 ppm1.0 ppm

Hydrogen cyanideHCN

7.1 ppm

1.0 ppm

Hydrogen fluoride

HF

6.0 ppm

0.0 ppm

Phosphine

PH3

4.8 ppm

6.1 ppm

Fluorine

F2

10 ppm-0.4 ppm

Nitrogen monoxideNO

100 ppm-0.1 ppm

Nitrogen dioxide

NO2

7.6 ppm-2.9 ppm
2.9 ppm

Sulfur dioxide

SO2

10 ppmHydrogen bromide

HBr

15 ppm1.0 ppm

Chlorine trifluoride

ClF3

0.16 ppm

0.1 ppm

Disilane

Si2H6

7.3 ppm

9.4 ppm<ESF-A24D2 (NO)>Gas name

Chemical formula

Gas concentration

AmmoniaNH3

250 ppm

Reading
0 ppm

Chlorine

Cl2

10 ppm-5 ppm-2 ppmOzone

O3

2.9 ppm

Hydrogen chloride

HCl

15 ppm2 ppm

Hydrogen cyanideHCN

7.4 ppm

3 ppm

Hydrogen fluoride

HF

6.0 ppm

0 ppm

PhosphinePH3

20.1 ppm

2 ppm

Fluorine

F2

10 ppm0 ppm

SilaneSiH4

7.2 ppm

14 ppmNitrogen dioxideNO2

41.2 ppm

2 ppm

Sulfur dioxide

SO2

10 ppm7 ppm

Hydrogen bromide

HBr

15 ppm2 ppm

Chlorine trifluoride

ClF3

0.16 ppm

0 ppm

Disilane

Si2H6

7.3 ppm

20 ppm133 / 140

12. Appendix

12-4 List of interference gases for electrochemical type sensors<ESF-AA20 (NO2)>
Gas name

Chemical formula

Gas concentration

AmmoniaNH3

400 ppm

Reading
1.0 ppm

Chlorine

Cl2

0.8 ppm

0.2 ppm
4.60 ppm

Ozone

O3

2.55 ppm

Hydrogen chloride

HCl

4.8 ppm-6.1 ppm

Hydrogen cyanide

HCN

6.4 ppm-0.08 ppm

Hydrogen fluoride

HF

6.0 ppm-0.10 ppm

PhosphinePH32.56 ppm-8.11 ppm

Fluorine

F2

1.6 ppm

0.13 ppm

SilaneSiH4

8.0 ppm-2.1 ppm

Nitrogen monoxideNO101 ppm

0.68 ppm

Sulfur dioxide

SO2

10 ppm-0.2 ppm

Hydrogen bromide

HBr

15.0 ppm-4.44 ppm

Chlorine trifluoride

ClF3

1.6 ppm

0.93 ppm

Disilane

Si2H6

14.8 ppm-16.15 ppm

Gas name

Chemical formula

Gas concentration

Reading

AmmoniaNH3

250 ppm

0.01 ppm

Chlorine

Cl2

10 ppm

-7.39 ppm
-4.07 ppm

<ESF-A24D (SO2)>

Ozone

O3

2.9 ppm

Hydrogen chloride

HCl

15 ppm3.51 ppm

Hydrogen cyanide

HCN

6.9 ppm

3.09 ppm
0.08 ppm

Hydrogen fluoride

HF

6.0 ppm

PhosphinePH30.48 ppm

2.12 ppm

Fluorine

F2

10 ppm-1.31 ppm

SilaneSiH4

1.2 ppm

4.18 ppm

Nitrogen monoxideNO

100 ppm-0.35 ppm
-10.09 ppm

Nitrogen dioxide

NO2

7.6 ppm

Hydrogen bromide

HBr

15 ppm3.38 ppm

Chlorine trifluoride

ClF3

0.16 ppm

0.35 ppm

Disilane

Si2H6

0.60 ppm

2.68 ppm

134 / 140

12. Appendix

12-4 List of interference gases for electrochemical type sensors<ESF-A24E2 (HBr)>
Gas name

Chemical formula

Gas concentration

Reading

AmmoniaNH3

400 ppm-0.23 ppm

ChlorineCl2

2.5 ppm

0.48 ppm

Ozone

O3

2.4 ppm-0.06 ppm

Hydrogen chloride

HCl

3.2 ppm

3.84 ppm

Hydrogen cyanide

HCN

6.9 ppm

0.04 ppm
0.47 ppm

Hydrogen fluoride

HF

6.0 ppm

PhosphinePH30.50 ppm

1.07 ppm

Fluorine

F2

6.0 ppm-0.19 ppm
0.10 ppm

SilaneSiH4

7.1 ppm

Nitrogen monoxideNO

10 ppm0.61 ppm

Nitrogen dioxide

NO2

7.6 ppm

0.25 ppm

Sulfur dioxide

SO2

10 ppm

0.41 ppm

Chlorine trifluoride

ClF3

0.16 ppm

0.02 ppm

Disilane

Si2H6

15 ppm1.88 ppm<ESF-B24A (ClF3)>
Gas name

Chemical formula

Ammonia

NH3

Gas concentration
75 ppmReading-0.10 ppm

Chlorine

Cl2

0.16 ppm

0.27 ppm

Ozone

O3

0.34 ppm

0.10 ppm

Hydrogen chloride

HCl

3.2 ppm

3.05 ppm

Hydrogen cyanideHCN

5.1 ppm-0.06 ppm

Hydrogen fluoride

HF

1.6 ppm

1.16 ppm

PhosphinePH3

2.5 ppm

0.03 ppm

Fluorine

F2

1.6 ppm

2.23 ppm

SilaneSiH430 ppm

0.00 ppm

Nitrogen monoxideNO

100 ppm

0.35 ppm

Nitrogen dioxideNO2

2.2 ppm

0.08 ppm

Sulfur dioxide

SO20.50 ppm

0.02 ppm

Hydrogen bromide

HBr

3.2 ppm

2.08 ppm

Disilane

Si2H6

7.2 ppm

0.03 ppm

135 / 140

12. Appendix

12-4 List of interference gases for electrochemical type sensors<ESF-A24D (Si2H6)>
Gas name

Chemical formula

Gas concentration

AmmoniaNH3

250 ppm

Reading
0.0 ppm

Chlorine

Cl2

10 ppm-1.7 ppm-0.7 ppm

Ozone

O3

2.4 ppm

Hydrogen chloride

HCl

15 ppm0.8 ppm

Hydrogen cyanide

HCN

6.4 ppm

0.7 ppm

Hydrogen fluoride

HF

6.0 ppm

0.0 ppm

Phosphine

PH3

4.8 ppm

4.7 ppm

Fluorine

F2

10 ppm-0.3 ppm

SilaneSiH4

7.2 ppm

5.6 ppm

Nitrogen monoxideNO

100 ppm-0.1 ppm

Nitrogen dioxide

NO2

7.6 ppm-2.3 ppm

Sulfur dioxide

SO2

10 ppm2.2 ppm

Hydrogen bromide

HBr

15 ppm0.8 ppm

Chlorine trifluoride

ClF3

0.16 ppm

0.1 ppm

136 / 140

12. Appendix

12-5 Radio law certification

12-5 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), andspecified 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 to eliminate
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.

137 / 140

12. Appendix

12-5 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: SC-9000

138 / 140

12. Appendix

12-6 Warranty policy

12-6 Warranty policy
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 and unused
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 fromRIKEN; 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. RIKENSHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR BASED ON CONTRACT, TORTOR 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 of competentjurisdiction, 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

139 / 140

12. Appendix

12-6 Warranty policy

Table: List of warranty years
Product warranty
3 years
Sensor warranty
Sensor model

Detection target gas

ESF-B242

Ammonia (NH3)

Warranty period
2 years

ESF-C930

Chlorine (Cl2)

3 years

ESF-B249

Ozone (O3)

1 yearESF-A24E2

Hydrogen chloride (HCl)

3 years

ESF-A24D(Japan Ex model)

Hydrogen cyanide (HCN)

3 years

ESF-B248(Japan Ex model)

Hydrogen fluoride (HF)

1 year

ESF-B248X(ATEX/IECEx model)

Hydrogen fluoride (HF)

1 yearESF-A24D

Phosphine (PH3)

3 years

ESF-B248

Fluorine (F2)

1 yearESF-A24D

Silane (SiH4)

3 years

ESF-A24D2

Nitrogen monoxide (NO)

3 years

ESF-AA20

Nitrogen dioxide (NO2)

3 years
3 years

ESF-A24D

Sulfur dioxide (SO2)

ESF-A24E2

Hydrogen bromide (HBr)

3 years

ESF-B24A

Chlorine trifluoride (ClF3)

3 years

ESF-A24D

Disilane (Si2H6)

3 years

140 / 140

Revision history
Issue
0

Revision details
First issue (PT0-2160)

Issue dateJune 10, 2024