Riken Keiki GW-3 User manual

PT0E-1887
Portable Gas Monitor
GW-3
Operation Manual
(PT0-188)
2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan
Website: https://www.rikenkeiki.co.jp/

Contents
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Contents
1. Product Overview..........................................................................................................................................................4
1-1. Introduction ...........................................................................................................................................................4
1-2. Intended use .........................................................................................................................................................6
1-3. DANGER, WARNING, CAUTION, and NOTE .....................................................................................................7
1-4. Checking standards and explosion-proof specifications.......................................................................................8
2. Important Safety Information.........................................................................................................................................9
2-1. Danger information ...............................................................................................................................................9
2-2. Warning information ............................................................................................................................................11
2-3. Caution information............................................................................................................................................ 14
2-4. Safety information .............................................................................................................................................. 18
3. Product Configuration ................................................................................................................................................ 21
3-1. Main unit and accessories ................................................................................................................................. 21
3-2. Part names and functions .................................................................................................................................. 23
3-2-1. Main unit .................................................................................................................................................. 23
3-2-2. LCD display ............................................................................................................................................. 24
3-3. Inserting the battery ........................................................................................................................................... 26
4. Alarm Functions ......................................................................................................................................................... 29
4-1. Gas alarm types and alarm setpoints ................................................................................................................ 29
4-2. Gas alarm activation .......................................................................................................................................... 32
4-3. Fault alarm activation......................................................................................................................................... 34
4-4. Outside operating temperature range warning .................................................................................................. 35
5. Usage Instrucions ...................................................................................................................................................... 36
5-1. Usage note......................................................................................................................................................... 36
5-2. Preparing startup................................................................................................................................................ 36
5-3. Turning on the power ......................................................................................................................................... 37
5-4. Performing air calibration ................................................................................................................................... 43

Contents
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5-5. Measuring gas concentration............................................................................................................................. 46
5-6. Checking the gas concentration, alarm setpoints, etc. (display mode) ............................................................. 48
5-6-1. Procedure for displaying display mode ................................................................................................... 48
5-6-2. Items displayed in display mode ............................................................................................................. 49
5-7. Turning off the power ......................................................................................................................................... 54
6. User Mode Settings ................................................................................................................................................... 55
6-1. User mode setting procedure ............................................................................................................................ 55
6-2. User mode setting items .................................................................................................................................... 58
7. Maintenance .............................................................................................................................................................. 62
7-1. Maintenance intervals and maintenance items ................................................................................................. 62
8. Storage and Disposal................................................................................................................................................. 64
8-1. Procedures for storage or when not in use for extended periods...................................................................... 64
8-2. Product disposal................................................................................................................................................. 65
9. Troubleshooting ......................................................................................................................................................... 66
9-1. Product abnormalities ........................................................................................................................................ 66
10. Product Specifications ............................................................................................................................................... 69
10-1. Common specifications.................................................................................................................................... 69
10-2. Specifications by model ................................................................................................................................... 70
11. Appendix .................................................................................................................................................................... 72
11-1. Limited Warranty and Limitation Liability.......................................................................................................... 72

1. Product Overview 1-1. Introduction
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1
Product Overview
1-1. Introduction
Thank you for your purchase of the GW-3 Portable Gas Monitor (“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.
For more information on product maintenance and setting changes, refer to the Technical Manual available for
download from our website.
The contents of this manual are subject to change without notice to allow product improvements.
Riken Keiki accepts no liability for accidents or damage resulting from use of the product, whether within or outside
the warranty period.
Review the warranty policy indicated on the warranty.
<Checks made after purchase>
Before using the product, please confirm that the model of the product you purchased matches the model of the
product covered by this operating manual.

1. Product Overview 1-3. DANGER, WARNING, CAUTION, and NOTE
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1-3. DANGER, WARNING, CAUTION, and NOTE
This 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 injury
or significant property damage.
WARNING This indicates situations in which improper handling may result in serious injury or
significant property damage.
CAUTION This indicates situations in which improper handling may result in minor injury or minor
property damage.
Additionally, usage recommendations are indicated as follows:
NOTE This indicates items that will be helpful to know when using the product.

2. Important Safety Information 2-1. Danger information
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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
Explosion-proofing
Do not modify or alter the circuitry or configuration.
When using the product in hazardous areas, take the following precautions 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 MΩor
less).
Be sure to replace the battery in a safe place.
The explosion-proof class of the product is Ex ia IIC T4 Ga.