Riken Keiki GM-600 User manual

PT2E-2350
E.O. Gas Monitor
GM-600
Operating Manual

2
Contents
1. Outline of the Product..................................................................................................................................... 3
Preface............................................................................................................................................................ 3
Purpose of use................................................................................................................................................ 3
Definition of DANGER, WARNING, CAUTION and NOTE ............................................................................ 4
Method of confirmation for CE marking type .................................................................................................. 4
2. Important Notices on Safety........................................................................................................................... 5
2-1. Danger cases........................................................................................................................................... 5
2-2. Warning cases ......................................................................................................................................... 6
2-3. Precautions.............................................................................................................................................. 6
3. Product Components...................................................................................................................................... 7
3-1. Main unit and standard accessories........................................................................................................ 7
3-2. Names and functions for each part ......................................................................................................... 9
4. How to Install Gas Monitor ........................................................................................................................... 11
4-1. Precautions for installation points ......................................................................................................... 11
4-2. Precautions for system designing .........................................................................................................12
4-3. Installation of monitor ............................................................................................................................14
4-4. Precautions for wiring ............................................................................................................................17
5. How to Use ...................................................................................................................................................20
5-1. Before using the monitor .......................................................................................................................20
5-2. Preparation for start-up ......................................................................................................................... 20
5-3. Basic operating procedures................................................................................................................... 21
5-4. Power-on ...............................................................................................................................................22
5-5. Modes ....................................................................................................................................................23
5-6. User mode .............................................................................................................................................24
5-7. Power-off ...............................................................................................................................................26
6. Alarm Activation and Functions ....................................................................................................................27
6-1. Gas alarm activation.............................................................................................................................. 27
6-2. Fault alarm activation ............................................................................................................................29
7. Maintenance .................................................................................................................................................30
7-1. Maintenance intervals and items...........................................................................................................30
7-2. Maintenance (regular maintenance) mode ........................................................................................... 32
8. Storage and Disposal ...................................................................................................................................45
8-1. Procedures to store the monitor or leave it for a long time...................................................................45
8-2. Procedures to relocate the monitor 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. List of accessories ...............................................................................................................................48
10-3. Optional accessories ...........................................................................................................................49
11. Appendix .....................................................................................................................................................50
11-1. Detection principle of semiconductor type ..........................................................................................50
11-2. Definition of terms................................................................................................................................ 51

1. Outline of the Product Preface
3
1
1. Outline of the Product
Preface
Thank you for choosing our ethylene oxide (E.O.) gas monitor GM-600 (hereinafter referred to as "the
monitor"). Please check that the model number of the product you purchased is included in the
specifications on this manual.
This manual describes how to use the monitor properly and its specifications. Not only the first-time users
but also the users who have already used the monitor must read and understand the operating manual and
use this product as described in this manual.
Note that the contents of this manual are subject to change without notice for product improvement. It is
also prohibited to copy or reproduce this manual, in whole or in part, without permission.
Regardless of warranty period, we shall not make any indemnification for accidents and damage caused by
using the monitor.
Make sure to read the warranty policy specified on the warranty.
Purpose of use
E.O. gas, which is used for sterilization, is a highly dangerous gas. Even at low gas concentration (allowable
concentration is 1 ppm for ACGIH in 2015 and Japan Society for Occupational Health in 2015), the gas may
adversely affect the human body.
- This is a gas monitor to detect a small amount of E.O. gas leaking from a sterilization device or other
device that uses E.O. gas. The gas monitor is a safety unit, not an analyzer or densitometer which
performs quantitative/qualitative analysis/measurement for E.O. gas.
Please fully understand the features of the monitor before using it, so that it can be used properly.
- This is an E.O. gas monitor to detect E.O. gas leaking from a sterilization device or other device. Do not
use the monitor with it attached to a control device, equipment, etc.
- The monitor notifies of a detected E.O. gas alarm with the buzzer and LCD backlight.
- The monitor has two-step gas alarm contact and fault alarm contact.
- The monitor outputs an alarm contact at a gas alarm state.

1. Outline of the Product Definition of DANGER, WARNING, CAUTION and NOTE
4
Definition of DANGER, WARNING, CAUTION and NOTE
Throughout this manual, the following indications are used to ensure safe and effective work.
DANGER
This message indicates that improper handling may cause serious damage
on life, health or assets.
WARNING This message indicates that improper handling may cause serious damage
on health or assets.
CAUTION This message indicates that improper handling may cause minor damage
on health or assets.
NOTE This message indicates advice on handling.
Method of confirmation for CE marking type
The CE marking is labeled on the detector in case of comply with CE marking. Please confirm the
instrument specification before using. Please refer Declaration of Conformity that is at the end of this
manual if you have CE marking type.
You can confirm instrument specification to see the CE marking as follows.
CE marking label (Bottom of instrument)
(DC specification only)
CE marking

2. Important Notices on Safety 2-1. Danger cases
5
2
2. Important Notices on
Safety
To maintain the performance of the monitor and use it safely, observe the following instructions with
WARNING and CAUTION.
2-1. Danger cases
DANGER
This is not an explosion-proof unit. Never attempt to measure a gas in an atmosphere over the
lower explosive limit.
Do not extend the remote sensor cable. If the cable is extended, the monitor will not be able to
detect gas and may cause dangerous conditions.
WARNING
If an abnormality is found in the monitor, contact RIKEN KEIKI immediately. Visit our Web site to
find your nearest RIKEN KEIKI office.
Web site: http：//www.rikenkeiki.co.jp/

2. Important Notices on Safety 2-2. Warning cases
6
2-2. Warning cases
2-3. Precautions
WARNING
Before turning on the monitor, always check that the voltage is compliant with the specifications.
Operating on an unstable power supply may cause malfunctions.
When the gas adjustment is performed, never fail to perform the air (zero) calibration in fresh air.
Do not operate this monitor in a place where combustible/explosive gases or vapors are present.
Operating the monitor in such an environment will lead to extreme dangers.
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based on
your judgment.
Perform span adjustment at fixed intervals.
When using the monitor, make sure that the main unit is installed in contact with the atmosphere.
Otherwise, correct measurement cannot be obtained and a leak accident may result.
Do not run the power cable and remote sensor cable of the monitor in parallel with cables of
high-frequency or high-voltage and other device's power cables. It may cause a malfunction.
If a cable of high-frequency or high-voltage and the power cable need to intersect with each other,
it should be orthogonally connected.
When wiring, be careful not to apply any stresses on the cables by pulling, tightening or twisting.
Do not disassemble/modify the monitor. It may invalidate the warranty of the performance.
Changing the settings without understanding them may cause alarm malfunctions. Please use the
monitor properly in accordance with the operating manual.
Do not use the monitor with it attached to a control device, equipment, etc.
CAUTION
Do not use a device, such as a transceiver, which transmits a radio wave near the monitor or its
cables. It may affect the measurement. If a transceiver or other radio wave transmitting device is
used, it must be used in a place away from the monitor where it disturbs nothing.
Restarting the monitor within five seconds after turning it off may cause errors.
This is not a control unit. It is not allowed to use the external output of the monitor to control other
units.
This is a safety unit. Never fail to perform a regular maintenance to ensure safety. Continuing to use
the monitor without performing maintenance will compromise the sensitivity of the sensor, thus
resulting in inaccurate gas detection.
Do not pick the sensor or buzzer opening with a sharp-pointed item. The unit may cause
malfunction or get damaged, possibly resulting in incorrect measurements.
Do not let the monitor draw in water. Do not also install the monitor in a place where the monitor
may get wet. Ignoring this may cause malfunction because the monitor is not water- and drip-proof.
Do not install the remote sensor in a place where the environmental condition exceeds the
operating temperature and humidity range (temperature: -10 to +40ºC, humidity: 20 to 85%Rh) or
steam accumulates.
This is a precision device. Do not give strong shock or vibration to the monitor.
When the case is opened for wiring or other operation, do not touch inner parts. When wiring, be
sure that excessive pressure is not applied to the power cable and remote sensor cable.
Do not block the vent for the sensor.

3. Product Components 3-1. Main unit and standard accessories
7
3
3. Product Components
3-1. Main unit and standard accessories
After opening the carton box, check the monitor and accessories.
If there is anything missing, contact RIKEN KEIKI.
Main unit
For names and functions of individual parts of the monitor and LCD display, see "3-2. Names and functions
for each part" (P.9).
GM-600 main unit Remote sensor (cable length: 3 m)

3. Product Components 3-1. Main unit and standard accessories
8
Standard accessories
- Cross-recessed pan head
machine screw (2 pcs.)
- Cross-recessed round head
wood screw (2 pcs.)
- 3.2 m AC power cable (1 pc.) *Supplied only with AC
specification
- Operating manual (1 pc.)
Optional accessories
- Installation board (1 pc.)
Outline drawing
Main unit Remote sensor
CAUTION
The main unit and remote sensor (remote type) are precision devices. Be careful not to drop the
monitor when installing or uninstalling the main unit or remote sensor. Dropping the monitor may
compromise its original performance or cause malfunctions.

3. Product Components 3-2. Names and functions for each part
9
3-2. Names and functions for each part
This section describes the names and functions of the individual parts and LCD display that make up the
monitor.
Main unit
Name Major function
(1) Power switch Turns the power ON/OFF. Slide the switch up to power on and down
to power off.
(2) MODE button Used to enter the maintenance mode.
It is also used to cancel or skip during setup.
(3) ˄button Used to change the screen and increase numerical values during
setup.
(4) ˅button Used to change the screen and decrease numerical values during
setup.
(5) SET button Used to confirm the setting.
(6) Buzzer sound opening Emits operation and judgment sounds. (Do not block it.)
(7) Screw Loosen this screw to open the case.
(8) Sensor part Detects a gas to be detected. The sensor is inside the cover.

3. Product Components 3-2. Names and functions for each part
10
Display
Name Major function
(1) Operating state display Displays the operating status. Blinks at a normal state.
(2) First alarm display Lights up in orange at a first alarm state.
(3) Second alarm display Lights up in red at a second alarm state.
(4) Fault alarm display Lights up in red at a fault alarm state.
(5) Gas name display
Maintenance display
Displays the gas name.
Maintenance items and others are displayed during setup.
(6) Unit display Does not display the gas concentration unit (ppm) in normal
measurement.
(7) Maintenance display Maintenance items and others are displayed during setup.
(8) AC/DC power display Lights up when the monitor is operating on AC or DC power.