PT2E-2710

Smart transmitter/Gas Detector Head

SD-1DRI<ITRI Specifications>Operating Manual(PT2E-196)(PT2-196)

Operating Precautions
This detector is a gas detector that detects combustible gases, toxic gases in the air and triggers a gas
alarm.
The gas detector is a safety unit, not an analyzer or densitometer which performs quantitative/qualitative
analysis/measurement for gases.
Please fully understand the following points before using it, so that it can be used properly.
1.

This detector may be interfered by gases and vapors other than the gas to be detected.
Please note that the alarm may be triggered by interference. In addition, it may be fluctuated byenvironmental (temperature, humidity, etc.) changes in the installation site.

2.

The alarm must be set within a range where the performance of the detector can be ensured.
In facilities compliant with the High Pressure Gas Safety Act, an alarm setting below our standard
alarm setpoint may trigger a false alarm.

3.

This is a safety unit, not a control unit.
The alarm contact output of the detector must be used for an external alarm lamp/buzzer, while thealarm signal output must be used for an indicator or external recorder.
If these outputs are used to control other units, we shall not be responsible for any malfunctions.

4.

For maintenance of the detector, it must go through a regular maintenance, including replacement andadjustment of the regular replacement parts as specified in the operating manual. In addition, because
this is a safety unit, it is recommended that a regular maintenance and a gas calibration are performed
every six months in accordance with the regulations.

Operating Precautions<Contents>
1 Outline of the Product ......................................................................................................... 1
1-1. Preface .............................................................................................................................. 1
1-2. Purpose of use .................................................................................................................. 1
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE ............................................... 1
1-4. Method of confirmation for Standards and Explosion proof specification .......................... 22 Important Notices on Safety................................................................................................ 3
2-1. Danger cases .................................................................................................................... 3
2-2. Warning cases .................................................................................................................. 4
2-3. Precautions ....................................................................................................................... 5
2-4. Safety Information ............................................................................................................. 6
3 Product Components .......................................................................................................... 7
3-1. Gas detector and standard accessories ............................................................................ 7
3-2. Names and functions for each part ................................................................................... 8
3-3. Block diagram ................................................................................................................... 9
4 How to Use ......................................................................................................................... 10
4-1. Before using the detector .................................................................................................. 10
4-2. Precautions for installation points...................................................................................... 10
4-3. Precautions for system designing ..................................................................................... 11
4-4. How to install ..................................................................................................................... 13
4-5. Installation procedure ........................................................................................................ 14
4-6. How to wire ....................................................................................................................... 16
4-7. How to tube ....................................................................................................................... 20
5 How to Operate................................................................................................................... 21
5-1. Preparation for start-up ..................................................................................................... 21
5-2. Basic operating procedures............................................................................................... 21
5-3. How to start the detector ................................................................................................... 22
5-4. Modes ............................................................................................................................... 23
5-5. Maintenance mode(User) .................................................................................................. 24
5-6. How to exit ........................................................................................................................ 26
6 Operations and Functions ................................................................................................... 27
6-1. Gas alarm activation ......................................................................................................... 27
6-2. Fault alarm activation ........................................................................................................ 28
6-3. External output operation .................................................................................................. 29
6-4. Other functions .................................................................................................................. 30
7 Maintenance ....................................................................................................................... 31
7-1. Maintenance intervals and items ....................................................................................... 31
7-2. Maintenance mode (Regular maintenance) ...................................................................... 33
7-3. Gas calibration method ..................................................................................................... 40
7-4. Parts replacement ............................................................................................................. 43
8 Storage, Relocation and Disposal....................................................................................... 45
8-1. Procedures to store the detector or leave it for a long time ............................................... 45
8-2. Procedures to relocate the detector or use it again ........................................................... 45
8-3. Disposal of products .......................................................................................................... 45
9 Troubleshooting .................................................................................................................. 46
10 Product Specifications ...................................................................................................... 48
10-1. List of specifications ........................................................................................................ 48
10-2. Detection principle ........................................................................................................... 51
11 Definition of Terms ............................................................................................................ 52

1

1 Outline of the Product1-1. Preface

1

Outline of the Product1-1. Preface
Thank you for choosing our smart transmitter/gas detector head SD-1DRI. This manual is Industrial
Technology Research Institute specifications (hereinafter referred to as ITRI specifications). Please checkthat the model number of the product you purchased is included in the specifications on this manual.
This manual explains how to use the detector and its specifications. It contains information required forusing the detector properly. Not only the first-time users but also the users who have already used the
product must read and understand the operating manual to enhance the knowledge and experience before
using the detector.
Although the number of digits to display varies depending on the detection range, this manual provides
explanation using a detection range from 0 to 100%LEL as examples (such as examples of LED display).

1-2. Purpose of use
 The detector is a fixed type gas detector head that detects leak of combustible gases and that performs thealarm activation when the gas concentration is over the setting value.
This detector is a safety unit, not an analyzer or densitometer which performs quantitative/qualitative
analysis/measurement for gases. Please fully understand the features of the detector before using it, sothat it can be used properly.
 The detector detects abnormalities in the air caused by presence of gases or other reasons (leak) with thebuilt-in gas sensor. The concentrations of detected gases are displayed on the seven-segment LED.
 An external pump etc. outside the detector introduces gas to perform gas detection.
 The detector has a built-in alarm contact and can be used either as a gas alarm, fault alarm, or common(gas, fault) alarm.
 The detector outputs gas concentration in 4 – 20 mA.

1-3. Definition of DANGER, WARNING, CAUTION, andNOTE
DANGERWARNINGCAUTION
NOTE

This message indicates that improper handling may cause serious
damage on life, health or assets.
This message indicates that improper handling may cause serious
damage on health or assets.
This message indicates that improper handling may cause minor
damage on health or assets.
This message indicates advice on handling.

-1-1 Outline of the Product1-4. Method of confirmation for Standards and Explosion proof specification

1-4. Method of confirmation for Standards andExplosion proof specification
This instrument has some specification depends on standard and explosion proof certificate. Pleaseconfirm the detector specification before using.

ITRI specifications name plate-2-3 Product Components

3-3. Block diagram

3-3. Block diagram<Electric Diagram>

Power supply part
POWER INPUT (24 VDC)
Display(POWER) (ALARM) (FAULT)
Alarm contact controller
1.Gas alarm contact(ALARM)or
2.Fault contact (FAULT)
or
3.Select either gas alarm orcontact (ALARM/FAULT)

Controller(CPU)

Seven-segment LED(four-digit)
Magnetic operation part
(MENU/ESC) (▲) (▼) (SET)Contact activation
 De-energized(De-energized at a
normal state)
ON-ALARM (Closed
contact at an alarm

SensorTransmitter• 4 – 20 mA transmission-9-6 Operations and Functions

6-1. Gas alarm activation

6

Operations and Functions
6-1. Gas alarm activation
Gas alarm: Activated when the concentration of detected gas reaches or exceeds the alarm setpoint value.
<<Auto-Reset>>

NOTE
The alarm setpoint is factory-set. Although the alarm delay time (standard: 2 seconds) works in the detector toprevent a false activation, it can be cancelled if not needed.

<Display Operation>
Gas Concentration Display
In case of over the detection range (Over Scale), "∩∩∩∩" is displayed on the LED.
Power Indicator Lamp (POWER: Green)
During operation, this lights up continuously.
Alarm Indicator Lamp (ALM: Red)
It lights up when the alarm setpoint value is reached to or exceeded.

<Contact Activation>
The contact is activated when the gas concentration reaches or exceeds the alarm setpoint value. (onlywhen the alarm is used)
The contact activation is reset automatically when the gas concentration drops below the alarm setpointvalue.

Concentration

Alarm setpoint

0

Time

Alarm lamp (ALM)
Alarm contact (terminal plate 4, 5)

Alarm delay time (2 seconds)- 27 -

6 Operations and Functions

6-2. Fault alarm activation<Response to Gas Alarm>
A gas concentration value exceeds the alarm setpoint
When a gas alarm is triggered, take actions in accordance with your management rules of gas alarm.
Normally, take the following actions.
 Check the reading of the detector.

NOTE
If a gas leak is momentary, the reading may already have dropped when checking it. In addition, when thealarm is triggered by noise or other incidental conditions other than a gas, the reading may have already
dropped.
 Based on your management rules of gas alarm, no one can be allowed to access the monitored zone toensure safety.
 If the gas concentration display continues to be displayed, close the main valve of the gas, and then checkthat the gas concentration reading dropped.
 Equipped with a protective gear to avoid dangers caused by possibly remaining gases, before accessing
the gas leak point, and then check that gases remain by using a portable gas detector.
 Determine that the point is free from dangers, and take actions to fix the gas leak.

6-2. Fault alarm activation
A fault alarm is triggered when the detector detects abnormalities. After a fault alarm is triggered, the fault
lamp (yellow) lights up and an error message is displayed on the LED. Determine the causes and takeappropriate actions.
After the detector is successfully returned from the fault, it restarts with the process normally performed rightafter it is turned on (initial clear).
If the detector has problems and is repeatedly malfunctioning, contact our overseas sales department or
local representative immediately.

<Display Operation>
Fault Detail Display
Display a message indicating the fault detail.
Fault Lamp (FAULT: Yellow)
This lights up when a failure occurs.

NOTE
For information on malfunctions (error messages), see "9. Troubleshooting".

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7 Maintenance7-1. Maintenance intervals and items

7

MaintenanceThis is an important instrument for the purpose of safety.
To maintain the performance of the detector and improve the reliability of safety, perform a regular
maintenance.

7-1. Maintenance intervals and items
 Daily maintenance: Perform maintenance before beginning to work.
 Monthly maintenance: Perform maintenance on the alarm circuit (alarm test) once a month.
 Regular maintenance: Perform maintenance once or more for every six months to maintain theperformance as a safety unit.
Maintenance
itemPower Supply
Check
Concentration
Display Check

Flow rate check
Filter check
Alarm Test
Span
Adjustment
Gas Alarm
Check

Maintenance content
Check that the power lamp lights up.
Check that the concentration display
value is zero. When the reading isincorrect, perform the zeroadjustment after ensuring that noother gases exist around it.
Check the flow rate to findabnormalities.
Check the dust filter for dust or
clogging.
Inspect the alarm circuit by using thealarm test function.
Perform the sensitivity calibration byusing the calibration gas.
Check the gas alarm by using thecalibration gas.

Daily
maintenance

Monthly
maintenanceRegularmaintenance











































<About Maintenance Services> We provide services on regular maintenance including span adjustment, adjustment and maintenance.
To make the calibration gas, dedicated tools, such as a gas cylinder of the specified concentration and gas
sampling bag must be used.
Our qualified service engineers have expertise and knowledge on the dedicated tools used for services,along with other products. To maintain the safety operation of the detector, please use our maintenanceservice.
 The followings are typical maintenance services. For more information, please contact our overseas sales
department or local representative.

- 31 -

7 Maintenance7-1. Maintenance intervals and items

Main Services
Power Supply
Check

:

Concentration
Display Check
Flow Rate Check:

Filter Check:

Alarm Test:

Span
Adjustment
Gas Alarm
Check:Cleaning andRepair of the
Detector(visualdiagnosis)
Detector
Operation
Check
Replacement ofConsumable
Parts

:

:

:

Checks the power supply voltage.
Verifies that the power lamp lights up.
(Verifies that relevant points can be identified on the system.)(When a UPS (uninterruptible power system) is used, checks the operation with the UPS(uninterruptible power system).)
Verifies that the concentration display value is zero by using the zero gas.
Performs the zero adjustment (AIR adjustment) if the reading is incorrect.
Checks the flow rate indicator to find abnormalities.
Checks the flow rate by using an external flow meter to verify the correctness of the flow rate
indicator on the gas detector. If the flow rate is incorrect, performs the flow rate adjustment.
Checks the dust filter for dust or clogging.
Replaces a dirty or clogged dust filter.
Inspects the alarm circuit by using the alarm test function.
• Checks the alarm lamps. (Check each activation of ALM.)• Checks the external alarm. (Checks the activation of the external alarm, such as a buzzer.)
Performs the sensitivity calibration by using the calibration gas.
Checks the gas alarm by using the calibration gas.
• Checks the alarm. (Checks the alarm activation when the alarm setpoint is reached.)• Checks the delay time. (Checks time to delay until the alarm is triggered.)• Checks the alarm lamps. (Check each activation of ALM.)• Checks the external alarm. (Check the activation of external alarms, such as a buzzer andreset signal.)
Checks dust or damage on surface, cover, or internal parts of the detector, clean and repair
such parts of the detector.
Replaces parts which are cracked or damaged.

:

Uses the keys to check the operation of functions and parameters.

:

Replaces consumable parts, such as a sensor, filter and pump.

- 32 -

9 Troubleshooting

9 Troubleshooting

9

Troubleshooting
The troubleshooting does not explain the causes of all the malfunctions which occur on the detector. This
simply helps to find the causes of malfunctions which frequently occur. If the detector shows a symptom
which is not explained in this manual, or still has malfunctions even though remedial actions are taken,
please contact our overseas sales department or local representatives.

<Abnormalities on Unit>
Symptom/Display

The power
cannot be turnedon.

Abnormaloperations

Sensorabnormalities
E-1

Systemabnormalities
E-9

FAULT

-

-





Causes
The wiring is not correct.
The terminal plate isremoved.

Actions
Connect the wiring properly.
Connect the terminal plate properly.

Abnormalities/momentary
blackout of power supply
systemProvide the rated voltage.
Check the UPS, power supply line filter andinsulation transformer, and then take additional
measures.

Cable abnormalities(open circuit/not
connected/short circuit)

Check the wiring of detector and related devices
around it.

Disturbances by sudden
surge noise, etc.

Turn off and restart the detector.
If such a symptom is observed frequently, takeappropriate measures to eliminate the noise.

The sensor is notconnected or improperly
connected.
Zero drift caused byenvironmental changes or
aging deterioration is outof the range of zero
follower.
Faults of the sensor
The rated voltage is not
supplied to the detector.
Abnormalities of ROM,
RAM, or EEPROM insideof the detector- 46 -

Check if the sensor cable is securely fastened tothe terminal plate.
Perform the zero adjustment. If the symptom
persists after the zero adjustment, replace thesensor with a new one.
Replace the sensor with a new one.
Check the power supply, and supply the rated
voltage.
Please contact our overseas sales department
or local representatives.

9 Troubleshooting

9 Troubleshooting<Abnormalities of Readings>
Symptoms

The reading rises(drops) and it remainsso.

CausesDrifting of sensor
outputPresence ofinterference gas
Slow leakEnvironmental
changes
Presence ofinterference gas

A gas alarm is triggered
despite of no gas leakand no otherabnormalities at thedetection point.

Slow response

Sensitivity calibration
impossible

Disturbance by
noise

Sudden change inthe environment

Clogged dust filter
Bended, clogged, or
leaked suction tube
or exhaust tube
Condensation isformed inside thesuction tube.
Deteriorated sensor
sensitivity
Improper calibration
gas concentration
Deteriorated sensor
sensitivity

Actions
Perform the zero adjustment.
Interference gas test including solvents are identified,and be treated properly.
A very small amount of the gas to be detected may beleaking (slow leak). Because ignoring it may cause
dangers, take a remedial measure, i.e., taking actions thesame as those for the gas alarm.
Perform the zero adjustment (AIR adjustment).
Interference gas test including solvents are identified,and be treated properly.
Turn off and restart the detector.
If such a symptom is observed frequently, takeappropriate measures to eliminate the noise.
When the environment (temperature, etc.) changes
suddenly, the detector cannot adjust to it and is affectedby it.
In some cases, the detector triggers an indication alarm.
Because the detector cannot be used under sudden andfrequent environmental changes, any preventive actions
should be taken to eliminate them by the user.
Replace the dust filter.
Fix the defective parts.

Fix the defective parts.

Replace the sensor with a new one.
Use the proper calibration gas.
Replace the sensor with a new one.

- 47 -

10 Product Specifications

10-1. List of specifications

10

Product Specifications
10-1. List of specifications<ITRI Specifications>
Model
Detection principle
Detection gas
Concentration display
Detection range
Resolution
Detection method
Suction flow
Alarm setpoint
Power display
External output
Alarm accuracy(under an identical condition)
Alarm-delay time
(under an identical condition)
Gas alarm typeGas alarm display
Gas alarm patternFault alarm/Self diagnosis
Fault alarm display
Fault alarm pattern
Alarm contact
Contact capacity
Transmission scheme
Transmission specification
Transmission cable
Transmission distanceSD-1DRI
Non-dispersive infrared absorption method
Combustible gas
LED(4digits・7segments)
Depend on detection gas
Depend on detection gas
Suction method(pour into by external unit)
1.5±0.1L/min
Depend on detection gas
POWER lamp lighting(green)
Gas concentration signal/alarm contact (gas alarm or fault alarm, gas/fault common alarm)
Within ±25% to the alarm setpoint value
Within 30sec(when introducing 1.6 times thicker gas than alarm setpoint value)(without piping
delay time)Single alarm(H)ALM lamp lighting(red)Auto-recover
System failure/Sensor failure
FAULT lamp lighting(yellow)/content display
Auto-recoverNo-voltage contact 1a・Non-exciting at normal(exciting at alarm) or exciting at normal(non-exciting at alarm)
250VAC - 0.5A/30VDC - 0.5A(resistive load)
Three-wire analog transmission(in common with power supply<power, signal, common>)4 - 20mA DC (linear/load resistance under 300Ω)
CVVS1.25 mm2 or 2.0mm2 - 3-core (when the contact is not used)
CVVS1.25 mm2 or 2.0mm2 - 5-core (when the contact is used)
1.25km or less in case of CVVS 1.25mm2
2.0km or less in case of CVVS 2.0mm2
24 VDC±10%MAX.2W
Pressure proof packing gland<G3/4>(Compatible cables φ9.6-13.0mm in outer diameter)
Rc1/8(with BS half union<for Cu pipe> or SUS half union<for SUS pipe>
Approx.25sec
Depend on detection gas (non-rapidly-vary)
Below 95%RH(non-condensing)
Wall mounting type
Flame proof structure

Power supply
Power consumption
Cabling port
Piping port
Initial clear
Operating temperature range*
Operating humidity range
Structure
Explosion protected
construction
Explosion-proof class
Ex d II C T6 Gb X
Dimensions
Approx.148(W)×177(H)×88(D)mm(projection portion excluded)
WeightApprox.2.2kg
Color
Munsell 7.5BG5/2* The ambient temperature range which maintain a capability of explosion proof of the label on the detector is -20～+53℃. However,
the available operating temperature range is different depending on detectable gas (P50).

- 48 -

10 Product Specifications

10-1. List of specifications＜Detection gas list＞
Detection gas

Operating temperature
range
ITRI specifications-20～53℃-10～53℃-20～53℃-20～53℃-20～53℃-10～53℃-20～53℃-20～53℃-20～53℃-20～53℃-20～53℃-20～53℃-10～50℃-20～53℃-20～53℃-20～53℃-20～53℃-20～53℃-20～53℃-20～53℃-10～53℃-20～53℃-20～53℃-20～53℃-20～53℃-10～53℃-20～53℃-20～53℃-20～53℃-20～53℃-20～53℃-20～53℃-20～53℃-10～50℃-20～53℃

Gas code

Detection range

Alarm point

LNG
1,2-Dichloroethane
1,3-Dioxolane
1-Butene
1-Hexene
AcetoneIsobutane
IsobutenIsopropyl Alcohol
IsoPentane
EthaneEthanol
Ethylene
XyleneMethyl chloride
Ethyl Acetate
n-Butyl acetate
Propylene oxide
Cyclopentane

LNG
EDC
C3H6O2C4H8
1-C6H12C3H6O
i-C4H10i-C4H8IPA
i-C5H12
C2H6
C2H5OH
C2H4
C8H10
CH3CL
EtAC
C6H12O2PO
C5H10

Dichloromethane
Diethyl carbonate
Dimethyl carbonate
Tetrahydrofuran
City gas 13A
TolueneCarbon Dioxiden-Butanen-Hexane

CH2CL2
C5H10O3C3H6O3
THF
13A
C7H8
CO2
n-C4H10n-C6H14

n-Heptane
Pentane1,3-Butadiene
PropanePropylene glycol ethyl ether
acetateBenzeneMethanen-C7H16n-C5H12
C4H6
C3H8

0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-5000 ppm
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL
0-10000 ppm
0-100 %LEL
0-100 %LEL
0-5 vol%
0-10 vol%0-100 %LEL
0-100 %LEL
0-100 %LEL
0-100 %LEL

25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
1250
25.0
25.0
25.0
25.0
25.0
25.0
5000
25.0
25.0
1.25
2.5
25.0
25.0
25.0
25.0

PGMMEAc

0-100 %LEL

25.0

-20～53℃

C6H6CH4Methanol
Methyl ethyl ketone

CH3OH
MEK

0-100 %LEL
0-100 %LEL
0-100 vol%0-100 %LEL
0-10000 ppm
0-100 %LEL

25.0
25.0
25.0
25.0
2500
25.0

-10～50℃-20～53℃-20～53℃-20～53℃-10～50℃-20～53℃* Please contact our overseas sales department or local representative except gas mentioned above.

- 50 -

11 Definition of Terms

11

Definition of Terms
Non-dispersive
infrared type
Initial clear
Full scale%LEL
ppm
Calibration
Zero suppression
Alarm delay time
INHIBIT

This is a principle of the sensor installed in the detector head.
See "10-2. Detection principle" for details.
Output from the detector head fluctuates for a while after turning on the power.
This is a function to prevent triggering alarm during that time.
Maximum value of the detection range.
A unit which the lower explosive limit (LEL) of the combustible gas to be detected is
set to 100.
A concentration unit that means part per million of the combustible gas to be
detected.
Adjusts the readings to the calibration gas concentration value by using thecalibration gas.
A function to cut off the specific drifting that the sensor has.
A function which temporarily suspends activation to prevent a false alarm caused
by noise from its outside.
The gas detection function is temporarily suspended during maintenance, etc. ofthe detector.
This is also called "point skip", which has the same function.

- 52 -

Manual Log
Rev.
0Amendment
First issue

Issue data
2019/1/18