Riken Keiki PT0E-09810 User manual

PT0E-09810
Portable Gas Monitor
GX-8000
Operating Manual
(PT0-098)

2
<Contents>
1 Outline of the Product.............................................................................................. 3
1-1. Preface .................................................................................................................... 3
1-2. Purpose of use ........................................................................................................ 3
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE ..................................... 3
1-4. Method of confirmation for Standards and Explosion proof specification................. 3
2 Important Notices on Safety .................................................................................... 5
2-1. Danger cases .......................................................................................................... 5
2-2. Warning cases......................................................................................................... 8
2-3. Precautions ............................................................................................................. 9
2-4. Safety information ................................................................................................... 10
3 Product Components............................................................................................... 12
3-1. Main unit and standard accessories ........................................................................ 12
3-2. Names and functions for each part.......................................................................... 15
4 How to Use.............................................................................................................. 18
4-1. Before using the gas monitor................................................................................... 18
4-2. Preparation for start-up............................................................................................ 18
4-3. Basic operating procedures..................................................................................... 23
4-4. How to start the gas monitor.................................................................................... 24
4-5. How to detect .......................................................................................................... 26
4-6. Modes...................................................................................................................... 30
4-7. Air calibration mode................................................................................................. 31
4-8. Display/setting mode ............................................................................................... 33
4-9. How to exit............................................................................................................... 40
5 Operations and Functions ....................................................................................... 41
5-1. Gas alarm activation................................................................................................ 41
5-2. Fault alarm activation .............................................................................................. 43
5-3. Other functions ........................................................................................................ 43
6 Maintenance............................................................................................................ 44
6-1. Maintenance intervals and items ............................................................................. 44
6-2. Gas calibration method............................................................................................ 45
6-3. How to clean............................................................................................................ 46
6-4. Parts replacement ................................................................................................... 46
7 Storage and Disposal .............................................................................................. 49
7-1. Procedures to store the gas monitor or leave it for a long time ............................... 49
7-2. Procedures to use the gas monitor again ................................................................ 49
7-3. Disposal of products ................................................................................................ 50
8 Troubleshooting....................................................................................................... 51
9 Product Specifications ............................................................................................. 53
9-1. List of specifications ................................................................................................ 53
9-2. List of accessories................................................................................................... 55
10 Definition of Terms................................................................................................... 56

3
1
Outline of the Product
1-1. Preface
Thank you for choosing our portable gas monitor GX-8000. Please check that the model number of the
product you purchased is included in the specifications on this manual.
This manual explains how to use the gas monitor and its specifications. It contains information required for
using the gas monitor 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 gas monitor.
1-2. Purpose of use
This gas monitor is a multi gas type that enables simultaneous monitoring of all of the following five types of
gases at the maximum: oxygen, combustible gases, and toxic gases (carbon monoxide and hydrogen
sulfide) in the air and high-concentration combustible gases (vol%) in N2and inert gases.
Detection results are not intended to guarantee life or safety in any way.
The gas monitor comes in several types for different combinations of gases to be detected. Check the
specifications of the gas monitor before use and conduct gas detection properly in accordance with
purposes. (See the list of gases to be detected at the end of this operating manual.)
In addition to this operating manual, an operating manual for the data logger management program (option)
is available for the gas monitor. Contact RIKEN KEIKI if it is needed.
1-3. Definition of DANGER, WARNING, CAUTION, and
NOTE
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.

6
DANGER
The specifications of main units are as follows:
Pump circuit: Allowable voltage of 4.95 V, allowable current of 1.12 A, and
allowable power of 1138 mW
Combustible gas sensor circuit: Allowable voltage of 4.95 V, allowable current of 0.834 A, and
allowable power of 853 mW
Buzzer circuit: Allowable voltage of 4.95 V, allowable current of 0.431 A, and
allowable power of 441 mW
Main circuit: Allowable voltage of 4.95 V, allowable current of 0.717 A, and
allowable power of 733 mW
Backup circuit: 3.0 VDC, 10 µA
Ambient temperature: -20 °C - +50 °C
Explosion-proof grade of main unit is ExiaⅡCT4X.
About explosion-proof of battery unit
Do not modify or change the circuit or structure, etc.
When using this gas monitor in a hazardous area, take the following countermeasures for
preventing dangers resulting from electrostatic charges.
(1) Wear anti-static clothes and conductive shoes (anti-static work shoes).
(2) For indoor use, use the gas monitor while standing on a conductive work floor (with a
leakage resistance of 10 MΩor less).
The main unit that can be connected vary according to Explosion-proof approval No. of battery
unit.
Model/Explosion-proof approval No.
of battery unit
Model/Explosion-proof approval No.
of main unit that can be connected
BUL-8000(G) / TC19437
BUD-8000(G) / TC19438 GX-8000 / TC19439
BUL-8000(G1) / TC21223
BUD-8000(G1) / TC21224 GX-8000 / TC21222
The specifications of lithium ion battery units are as follows:
Pump circuit: Maximum voltage of 4.25 V, maximum current of 1.12 A, and
maximum power of 901 mW
Combustible gas sensor circuit: Maximum voltage of 4.25 V, maximum current of 0.768 A, and
maximum power of 618 mW
Buzzer circuit: Maximum voltage of 4.25 V, maximum current of 0.410 A, and
maximum power of 330 mW
Main circuit: Maximum voltage of 4.25 V, maximum current of 0.653 A, and
maximum power of 526 mW
Battery charging contact: Allowable current of 250 VAC 50/60Hz
Ambient temperature: -20 °C - +50 °C
Explosion-proof grade of lithium ion battery units are ExiaⅡCT4.
The specifications of dry battery units are as follows:
Pump circuit: Maximum voltage of 4.95 V, maximum current of 1.12 A, and
maximum power of 1138 mW
Combustible gas sensor circuit: Maximum voltage of 4.95 V, maximum current of 0.834 A, and
maximum power of 853 mW
Buzzer circuit: Maximum voltage of 4.95 V, maximum current of 0.431 A, and
maximum power of 441 mW
Main circuit: Maximum voltage of 4.95 V, maximum current of 0.717 A, and
maximum power of 733 mW
Power supply: 4.5 VDC, 250 mA (Type LR6 manufactured by Toshiba, 3 pcs)
Ambient temperature: -20 °C - +50 °C
Explosion-proof grade of dry battery units are ExiaⅡCT4.

7
DANGER
About combination
Make sure that the product model on the nameplate and combination of main unit and battery unit
is correct.
Inappropriate combinations of models deviate from the range of explosion-proof certification.
IP protection class: IP20
About use
While conducting measurement in a manhole or confined space, do not lean over or look into the
manhole or closed space. It may lead to dangers because oxygen-deficient air or other gases
may blow out.
Oxygen-deficient air or other gases may blow out from the gas exhausting outlet. Never inhale
the air or gases.
High-concentration (more than LEL) gases may blow out. Never use fire near the gas monitor.

8
2-2. Warning cases
WARNING
Sampling point pressure
The gas monitor is designed to draw gases around it under the atmospheric pressure. If
excessive pressure is applied to the gas inlet and outlet (GAS IN, GAS OUT) of the gas monitor,
detected gases may be leaked from its inside, thus leading to dangers. Be sure that excessive
pressure is not applied to the gas monitor while used.
Do not connect the gas sampling hose directly to a location with a pressure higher than the
atmospheric pressure. The internal piping system may be damaged.
Handling of sensor
Do not disassemble the electrochemical type sensor or galvanic cell type sensor because they
contain electrolyte. Electrolyte may cause severe skin burns if it contacts skin, while it may cause
blindness if it contacts eyes.
If electrolyte is adhered on your clothes, that part on your clothes is discolored or its material is
decomposed. If contact occurs, rinse the area immediately with a large quantity of water.
Fresh air adjustment in atmosphere
When the fresh air adjustment is performed in the atmosphere, check the atmosphere for freshness
before beginning the adjustment. If other gases exist, the adjustment cannot be performed properly,
thus leading to dangers when the gas leaks.
Response to gas alarm
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based on
your judgment.
Battery level check
Before use, check that there remains sufficient battery power. When the gas monitor is used for
the first time or is not used for a long period, the batteries may be exhausted. Either fully
recharge the batteries or replace them with new ones before use.
If a low battery voltage alarm occurs, gas detection cannot be conducted. If the alarm occurs
during use, turn off the power and promptly recharge the batteries in a non-hazardous area.
Others
Do not throw the gas monitor into fire.
Do not wash the gas monitor in a washing machine or ultrasonic cleaner.
Do not block the buzzer sound opening. No alarm sound can be heard.
Do not remove the battery unit while the power is ON.

9
2-3. Precautions
CAUTION
Do not use the gas monitor where it is exposed to oil, chemicals, etc. Do not submerge the gas
monitor under water on purpose.
Do not use in a place where the gas monitor is exposed to liquids such as oil and chemicals.
The gas monitor, being compliant to IP67, is not water-pressure-resistant. Do not use the gas
monitor where a high water pressure is applied to it (under a faucet, shower, etc.) or submerge it
under water for a long time. The gas monitor is water-proof only in fresh water and running
water, and not in hot water, salt water, detergent, chemicals, human sweat, etc.
The gas inlet and outlet are not water-proof. Be careful not to let water such as rainwater get into
these parts. Because this may cause trouble and gas cannot be detected.
Do not use the gas monitor where water or dirt gets accumulated. The gas monitor placed at
such a location may malfunction due to water or dirt that gets into the buzzer opening, gas inlet,
etc.
Note that drawing in dirty water, dust, metallic powder, etc. will significantly deteriorate the
sensor sensitivities. Be careful when the gas monitor is used in an environment where these
elements exist.
Do not use the gas monitor in a place where the temperature drops below -20 °C or rises over 50 °C.
The operating temperature of the gas monitor is -20 °C - +50 °C. Do not use the gas monitor at
higher temperatures, humidities, and pressures or at lower temperatures than the operating
range.
Avoid long-term use of the gas monitor in a place where it is exposed to direct sunlight.
Do not store the gas monitor in a sun-heated car.
Observe the operating restrictions to prevent condensation inside the gas monitor or gas sampling
hose.
Condensation formed inside the gas monitor or gas sampling hose causes clogging or gas
adsorption, which may disturb accurate gas detection. Thus, condensation must be avoided. In
addition to the operating environment, carefully monitor the temperature/humidity of the sampling
point to prevent condensation inside the gas monitor or gas sampling hose. Please observe the
operating restrictions.
Do not use a transceiver near the gas monitor.
Radio wave from a transceiver near the gas monitor may disturb readings. If a transceiver is
used, it must be used in a place where it disturbs nothing.
Do not use the gas monitor near a device that emits strong electromagnetic waves
(high-frequency or high-voltage devices).
Verify that the pump driving indicator is rotating before using the gas monitor.
If the pump driving indicator is not rotating, gas detection cannot be performed properly. Check
whether the flow rate is lost.
Do not forget to perform a regular maintenance.
Since this is a safety unit, a regular maintenance must be performed to ensure safety. Continuing to
use the gas monitor without performing a maintenance will compromise the sensitivity of the sensor,
thus resulting in inaccurate gas detection.

10
CAUTION
Others
Pressing buttons unnecessarily may change the settings, preventing alarms from activating
correctly. Operate the gas monitor using only the procedures described in this operating manual.
Do not drop or give shock to the gas monitor. The water-proof and explosion-proof properties
and accuracy may be deteriorated.
Do not use the gas monitor while recharging it.
Whereas the gas monitor can detect oxygen, combustible gases, carbon monoxide, and
hydrogen sulfide, the operating environment may include gases that have harmful effects on the
sensors of this unit. (Different gases can be defected depending on the type.)
The gas monitor cannot be used in the presence of the following gases:
(1) Sulfides (such as H2S and SO2) continuously existing in high concentrations
(2) Halogen gases (such as chloride compounds and chlorofluorocarbons)
(3) Silicone (Si compounds)
Do not use the gas monitor in the presence of the above gases (such as high-concentration
sulfides, halogen gases, and silicone), which may shorten the sensor life significantly or cause
malfunctions such as inaccurate readings.
In case the gas monitor is used for detection in the presence of silicone, etc., be sure to check
the gas sensitivities before using it again.

11
2-4. Safety information
The Portable Gas Monitor Model GX-8000 is a gas monitor designed to provide continuous exposure
monitoring of combustible gas, oxygen (O2), toxic gas such as carbon monoxide (CO) and hydrogen sulfide
(H2S) in hazardous environments. The gas sample is sucked in by build-in micro pump.
The battery can be selected either Li-ion battery or alkaline dry battery.
Li-ion battery unit is called BUL-8000,BUL-8000(G),BUL-8000(G1) and alkaline dry battery unit is called
BUD-8000(G),BUD-8000(G1).
The battery unit can be changed even by the end users.
Specification for safety
・Ex ia ⅡC T4 Ga (without NC-6215) ・Ex ia ⅡB T4 Ga (with NC-6215)
・Ⅱ1 G Ex ia ⅡC T4 Ga (without NC-6215)
・Ⅱ1 G Ex ia ⅡB T4 Ga (with NC-6215)
・Ambient temperature range for use : -20 °C - +50 °C
・Ambient temperature range during battery charging : 0 °C - +40 °C
Electrical data
・Power supply of Li-ion battery unit : BUL-8000(G),BUL-8000(G1)
Two parallel connected Li-ion cells used in battery pack BP-8000,BP-8000(1) are from type Maxell
INR18650PB1. Um = 250 V.
・Power supply of alkaline battery unit : BUD-8000(G),BUD-8000(G1)
Powered by three series connected Alkaline AA batteries, type LR6 manufactured by Toshiba.
・Backup battery type CR1220 manufactured by Maxell.
Certificate numbers
・IECEx Certificate number : IECEx KEM 10.0038
・ATEX Certificate number : KEMA 10ATEX 0085
List of standards
・IEC 60079-0: 2017 ・EN IEC 60079-0:2018
・IEC 60079-11: 2011 ・EN60079-11:2012
WARNING
・Do not charge in hazardous location.
・Do not charge it expect by genuine charger.
・Do not replace battery unit in hazardous location.
・Do not replace dry batteries in hazardous location.
・Do not attempt to disassemble or alter the instrument.
・Use only battery unit type BUD-8000(G),BUD-8000(G1) with three series connected Alkaline
AA batteries, type LR6 manufactured by Toshiba, or use chargeable battery unit
type BUL-8000(G),BUL-8000(G1).
INST. No. 0 0 0 0 0 0 0 0 0 0 0
AB C D E
A: Manufacturing year (0-9)
B: Manufacturing month (1-9,XYZ for Oct.-Dec.)
C: Manufacturing lot
D:Serialnumber
E: Code of factory
Additional information
The performance of the Portable Gas Monitor GX-8000, as a safety device, is not covered by
this certificate.
2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan
Phone : [phone]
Fax : [phone] GIII
E-mail : [email protected]
Web site : https://www.rikenkeiki.co.jp

13
DANGER
The specifications of main units are as follows:
Pump circuit: Allowable voltage of 4.95 V, allowable current of 1.12 A, and
allowable power of 1138 mW
Combustible gas sensor circuit: Allowable voltage of 4.95 V, allowable current of 0.834 A, and
allowable power of 853 mW
Buzzer circuit: Allowable voltage of 4.95 V, allowable current of 0.431 A, and
allowable power of 441 mW
Main circuit: Allowable voltage of 4.95 V, allowable current of 0.717 A, and
allowable power of 733 mW
Backup circuit: 3.0 VDC, 10 µA
Ambient temperature: -20 °C - +50 °C
Explosion-proof grade of main units are ExiaⅡCT4X.
About explosion-proof of battery unit
Do not modify or change the circuit or structure, etc.
When using this gas monitor in a hazardous area, take the following countermeasures for
preventing dangers resulting from electrostatic charges.
(1) Wear anti-static clothes and conductive shoes (anti-static work shoes).
(2) For indoor use, use the gas monitor while standing on a conductive work floor (with a
leakage resistance of 10 MΩor less).
The main unit that can be connected vary according to Explosion-proof approval No. of battery
unit.
Model/Explosion-proof approval No.
of battery unit
Model/Explosion-proof approval No.
of main unit that can be connected
BUL-8000(G) / TC19437
BUD-8000(G) / TC19438 GX-8000 / TC19439
BUL-8000(G1) / TC21223
BUD-8000(G1) / TC21224 GX-8000 / TC21222
The specifications of lithium ion battery units are as follows:
Pump circuit: Maximum voltage of 4.25 V, maximum current of 1.12 A, and
maximum power of 901 mW
Combustible gas sensor circuit: Maximum voltage of 4.25 V, maximum current of 0.768 A, and
maximum power of 618 mW
Buzzer circuit: Maximum voltage of 4.25 V, maximum current of 0.410 A, and
maximum power of 330 mW
Main circuit: Maximum voltage of 4.25 V, maximum current of 0.653 A, and
maximum power of 526 mW
Battery charging contact: Allowable current of 250 VAC 50/60 Hz
Ambient temperature: -20 °C - +50 °C
Explosion-proof grade of lithium ion battery units are ExiaⅡCT4.
The specifications of dry battery units are as follows:
Pump circuit: Maximum voltage of 4.95 V, maximum current of 1.12 A, and
maximum power of 1138 mW
Combustible gas sensor circuit: Maximum voltage of 4.95 V, maximum current of 0.834 A, and
maximum power of 853 mW
Buzzer circuit: Maximum voltage of 4.95 V, maximum current of 0.431 A, and
maximum power of 441 mW
Main circuit: Maximum voltage of 4.95 V, maximum current of 0.717 A, and
maximum power of 733 mW
Power supply: 4.5 VDC, 250 mA (Type LR6 manufactured by Toshiba, 3 pcs)
Ambient temperature: -20 °C - +50 °C
Explosion-proof grade of dry battery units are ExiaⅡCT4.

15
3-2. Names and functions for each part
<Outline Drawing>

16
(1) LCD display Displays gas concentrations, alarms, etc.
(2) Buzzer sound opening Emits a buzzer sound at an alarm. (Do not block it.)
(3) Alarm LED arrays The lamp blinks in response to an alarm.
(4) Infrared communication port Used to carry out data communications with a PC in data logger
mode.
(5) ▲/AIR switch Keep this switch pressed to perform fresh air adjustment.
(6) ▼/RESET switch When an alarm occurs, press this switch to reset the alarm.
(7) DISPLAY switch Press this switch to change between display modes.
(8) POWER/ENTER switch Turns on and off the power.
(9) Gas inlet Connect a sampling hose to this port.
(10) Gas outlet Exhausts the gas drawn into the gas monitor. (Do not block it.)
(11) Recharging jack cover Remove this cover to connect an AC powered charger and recharge
the batteries.
(12) Recharging indicator lamp Lights up in red during recharging and goes off when recharging is
completed.
(13) Sensor cover There are sensors inside. May be opened only when the sensor is to
be replaced.
(14) Activated carbon filter knob Turn this knob to detach and replace the activated carbon filter. No
activated carbon filter is used on a type that does not measure carbon
monoxide. Keep this knob tightened at all times.
(15) Battery unit screws Turn these screws to detach and replace the battery unit.
CAUTION
Do not jab the buzzer opening with a sharp-pointed item. The unit may malfunction or get
damaged, allowing water or foreign substance, etc. to get inside.
Do not remove the panel sheet on the display. The water-proof and dust-proof performances will
be deteriorated.
Do not affix a label on the infrared port. Infrared communications can no longer be conducted.

18
4
How to Use
4-1. Before using the gas monitor
Not only the first-time users but also the users who have already used the product must follow the operating
precautions.
Ignoring the precautions may damage the gas monitor, resulting in inaccurate gas detection.
4-2. Preparation for start-up
Before starting gas detection, read and understand the following precautions. Ignoring these precautions
may prevent correct gas detection.
Check that the battery level is sufficient.
Check that there is no bend or hole in the gas sampling hose.
Check that the filter in the gas sampling probe is free of dust or clogging.
Check that the gas monitor, gas sampling probe, and gas sampling hose are connected properly.
<Recharging of Batteries>
When the gas monitor is used for the first time, or when the battery level is low, be sure to use the
accessory AC powered charger to recharge the batteries.
CAUTION
Use the dedicated AC powered charger.
Recharge the batteries in a non-hazardous area.
Recharge the batteries at ambient temperatures between 0 °C - 40 °C.
Do not use the gas monitor while recharging it. Correct measurements cannot be obtained.
Furthermore, the batteries get deteriorated more quickly and may have a shorter life.
The AC powered charger is not water-proof or dust-proof. Do not recharge the batteries while the
gas monitor is wet.
The AC powered charger is not explosion-proof.

19
(1) Open the recharging jack cover of the gas monitor.
(2) Put the plug of the AC powered charger into the recharging jack of
the gas monitor.
(3) Connect the AC powered charger to the wall electric outlet.
When recharging is started, the recharging indicator lamp lights up
(red).
(Recharging time: Three hours at the maximum until the batteries are fully recharged)
(4) When recharging is completed, the recharging indicator lamp goes off.
(5) When recharging is completed, disconnect the AC powered charger from the wall electric outlet.
(6) Pull out the AC powered charger plug from the power jack of the gas monitor and reattach the
recharging jack cover. Put the recharging jack cover as far as it will go.
NOTE
During recharging, the battery pack may get hot, but this is not abnormal.
The temperature of the gas monitor is high immediately after recharging is completed. Let it leave for
10 minutes or more before using it. Otherwise, correct measurements may not be obtained.
When fully recharged batteries are recharged again, the recharging indicator lamp does not go on.
CAUTION
Do not pull the recharging jack cover too hard.
It may get damaged.
CAUTION
Do not use the gas monitor with the recharging jack cover detached. Dust or water may get into
the gas monitor, causing it to malfunction. Replace the recharging jack cover if it is damaged.
If the recharging jack cover is not completely closed, water may get in from the power jack. The
same thing occurs if a minute foreign substance is caught beneath the cover.
Disconnect the AC powered charger from the wall electric outlet while it is not in use.

20
<Attaching Batteries>
(when the optional unit BUD-8000(G) ,BUD-8000(G1) are used)
When the gas monitor is used for the first time, or when the battery level is low, attach new AA alkaline
batteries.
(1) Using a flathead screwdriver or coin, turn the battery
cover fixing screw counterclockwise to open the
battery cover.
(2) Paying attention to the polarities of batteries, replace
all the three batteries with new ones.
(3) Close the battery cover and tighten the battery cover
fixing screw.
CAUTION
<Replacement>
Turn off the power of the gas monitor before replacing the batteries.
Replace the batteries in a non-hazardous area.
Replace all of the three batteries with new ones at one time.
Pay attention to the polarities of the batteries.
If the battery cover fixing screw is not completely tightened, the dry batteries may drop off or
water may get in through the clearance. Water may also get in if a minute foreign substance is
caught beneath the battery unit.
<Batteries>
Use AA alkaline batteries.
Rechargeable batteries cannot be used.