GX-8000 - RK Instruments

GX-8000 - RK Instruments
PT-xxx
Portable Gas Monitor
GX-8000
Operating Manual
Request for the Customers
•
•
•
•
•
•
Read and understand this operating manual before using the gas monitor.
Use the gas monitor in accordance with the operating manual.
Regardless of warranty period, we shall not make any compensation for accidents and
damage caused by using this product.
Because this is a safety unit, daily maintenance, gas calibration for every six months, and
regular maintenance must be performed.
The sensors of the gas monitor, having its sensor life, must be replaced at regular intervals.
If any abnormality was found in the gas monitor, notify them to Riken Keiki headquarters or
authorized local representative immediately.
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 and alkaline dry battery unit is called BUD-8000.
The battery unit can be changed even by the end users.
Specification for safety
・Ga Ex ia IIC T4
・
II 1 G Ex ia IIC T4
・Ambient temperature range for use : -20°C to +50°C
・Ambient temperature range during battery charging : 0°C to +40°C
Electrical data
・Power supply of Li-ion battery unit : BUL-8000
Two parallel connected Li-ion cells used in battery pack BP-8000 are from type Maxell
INR18650PB1. Um=250V.
・Power supply of alkaline battery unit : BUD-8000
Powered by three series AA size alkaline batteries , model LR6 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 60079-0:2004 ed.4.0
・IEC 60079-11:2006 ed.5.0
・IEC 60079-26:2006 ed.2
・EN60079-0:2006
・EN60079-11:2007
・EN60079-26:2007
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 with three series connected Alkaline
AA batteries, type LR6 manufactured by Toshiba, or use chargeable battery unit
type BUL-8000.
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: Serial number
E: Code of factory
2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan
Phone
: +81-3-3966-1113
Fax
: +81-3-3558-9110 GIII
E-mail
: [email protected]
Web site
: http://www.rikenkeiki.co.jp
Preface
Thank you for choosing our portable gas monitor GX-8000.
This gas monitor is a multi gas detector that enables simultaneous monitoring of combustible gases, oxygen,
and toxic gases (hydrogen sulfide and carbon monoxide) in the air and high-concentration combustible
gases in N2 and inert gases.
Note that detection results are not intended to guarantee life or safety in any way.
The gas monitor can measure two types of combustible gases, "general combustible gases (HC)" to be
used in ordinary factories, oil tankers, etc. and "methane (CH4)" such as city gas and natural gas.
The gas monitor comes in several types for different combinations of gases to be measured. Check the
specifications of the gas monitor before use and conduct measurement properly in accordance with
purposes. (See the list of gases to be measured at the end of this operating manual.)
This manual explains how to use the gas monitor. Not only the first-time users but also the user who have
already used a gas monitor must read and understand the operating manual before using this product. In
addition to this operating manual, there are two other manuals available for the gas monitor: "Maintenance
Manual" and "Data Logger Management Program Manual." Contact Riken Keiki if these manuals are
needed.
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.
-3-
GX-8000
<Contents>
Preface .................................................................................................................... 3
GX-8000
1
1-1.
1-2.
1-3.
Part Names ............................................................................................................. 5
Part names (Li-ion battery type) [Standard type] ..................................................... 5
Part names (Dry battery type) [Option] .................................................................... 7
LCD display ............................................................................................................. 8
2
2-1.
2-2.
2-3.
2-4.
2-5.
2-6.
2-7.
2-8.
2-9.
2-10.
2-11.
2-12.
2-13.
2-14.
2-15.
2-16.
2-17.
2-15.
2-16.
How to Use.............................................................................................................. 9
Information for first-time users................................................................................. 9
Preparation.............................................................................................................. 10
How to start and exit................................................................................................ 11
High-concentration combustible gas zero calibration
(TYPE-A and TYPE-E models) ................................................................................ 13
FAIL display ............................................................................................................. 14
Measurement .......................................................................................................... 15
End of measurement ............................................................................................... 16
Explanation of functions (1) ..................................................................................... 18
Explanation of functions (2) DISPLAY switch .......................................................... 19
Combustible gas range switching (TYPE-A and TYPE-E models) .......................... 19
PEAK value display ................................................................................................. 21
STEL value display.................................................................................................. 22
TWA value display ................................................................................................... 22
Alarm test (Full-scale/Alarm setpoint display).......................................................... 23
Pump OFF............................................................................................................... 23
Station ID selection.................................................................................................. 24
Manual memory storage and display....................................................................... 25
Error (FAIL) display ................................................................................................. 27
Dedicated battery unit.............................................................................................. 27
3
3-1.
3-2.
3-3.
3-4.
Alarms ..................................................................................................................... 30
Alarm types and patterns......................................................................................... 30
User actions for gas concentration alarms .............................................................. 32
STEL alarm (short term exposure limit) ................................................................... 32
TWA alarm (time-weighted average limit)................................................................ 32
4
4-1.
4-2.
4-3.
4-4.
4-5.
4-6.
Maintenance............................................................................................................ 33
Daily maintenance ................................................................................................... 33
Span adjustment ..................................................................................................... 34
Sensor replacement ................................................................................................ 34
Filter replacement.................................................................................................... 34
Li-ion battery unit or dry battery unit replacement [Option] ...................................... 36
Consumables .......................................................................................................... 37
5
Troubleshooting....................................................................................................... 38
6
6-1.
6-2.
6-3.
Specifications and Others........................................................................................ 40
GX-8000 specifications............................................................................................ 40
Combinations of detected gases by type................................................................. 41
GX-8000 accessories .............................................................................................. 42
-4-
1 Part Names
1-1. Part names (Li-ion battery type) [Standard type]
1
Part Names
1-1. Part names (Li-ion battery type) [Standard type]
GX-8000
-5-
1 Part Names
(1)
(2)
(3)
(4)
LCD display:
Buzzer sound opening:
Alarm LED arrays:
Infrared communication port:
(5) S/AIR switch:
(6) T/RESET switch:
(7) DISPLAY switch:
(8) POWER/ENTER switch:
(9) Gas inlet:
(10) Gas outlet:
(11) Recharging jack cover:
(12) Recharging indicator lamp:
(13) Sensor cover:
(14) Activated carbon filter knob:
(15) Battery unit screws:
GX-8000
1-1. Part names (Li-ion battery type) [Standard type]
Displays gas concentrations, alarms, etc.
Emits a buzzer sound to indicate an alarm. (Do not block it.)
The lamp blinks in response to an alarm.
Used to carry out data communications with a PC in data
logger mode.
Keep this switch pressed to perform air calibration. See Page
16 for further details.
When an alarm occurs, press this switch to reset the alarm.
See Page 16 for further details.
Press this switch to change between display modes. See
Page 16 for further details.
Turns on and off the power. See Page 16 for further details.
Connect a sampling hose to this port.
Exhausts the gas drawn into the gas monitor. (Do not block it.)
Remove this cover to connect an AC powered charger and
recharge the batteries.
Lights up in red during recharging and goes off when
recharging is completed.
There are sensors inside. May be opened only when the
sensor is to be replaced.
Turn this knob to detach and replace the activated carbon
filter.
Turn these screws to detach and replace the battery unit.
-6-
1 Part Names
1-2. Part names (Dry battery type) [Option]
1-2. Part names (Dry battery type) [Option]
(1)
(2)
(3)
(4)
LCD display:
Buzzer sound opening:
Alarm LED arrays:
Infrared communication port:
(5) S/AIR switch:
(6) T/RESET switch:
(7) DISPLAY switch:
(8) POWER/ENTER switch:
(9) Gas inlet:
(10) Gas outlet:
(11) Battery cover:
(12) Battery cover fixing screw:
(13) Sensor cover:
(14) Activated carbon filter knob:
(15) Battery unit screws:
Displays gas concentrations, alarms, etc.
Emits a buzzer sound to indicate an alarm. (Do not block it.)
The lamp blinks in response to an alarm.
Used to carry out data communications with a PC in data
logger mode.
Keep this switch pressed to perform air calibration. See Page
16 for further details.
When an alarm occurs, press this switch to reset the alarm.
See Page 16 for further details.
Press this switch to change between display modes. See
Page 16 for further details.
Turns on and off the power. See Page 16 for further details.
Connect a sampling hose to this port.
Exhausts the gas drawn into the gas monitor. (Do not block it.)
Open and close this cover to replace the batteries. Must be
closed while the gas monitor is in use.
Fixes the battery cover.
There are sensors inside. May be opened only when the
sensor is to be replaced.
Turn this knob to detach and replace the activated carbon filter.
Turn these screws to replace the dry battery pack.
-7-
GX-8000
1 Part Names
1-3. LCD display
1-3. LCD display
GX-8000
-8-
2 How to Use
2-1. Information for first-time users
2
How to Use
2-1. Information for first-time users
The gas monitor is used to detect "oxygen-deficient air," "combustible gases," "hydrogen sulfide," and
"carbon monoxide" that may be generated in a manhole, pit, underground premises, hold of a ship, etc.
WARNING
• Do not disassemble the gas monitor or modify or change the circuit or structure, etc.
• Do not connect the sampling hose directly to a location with a pressure higher than the atmospheric
pressure. The internal piping system may be damaged.
• 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. (See Pages 22 and 23.)
• Perform gas calibration at fixed intervals.
• 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 throw the gas monitor into fire.
• Do not use the gas monitor at higher temperatures, humidities, and pressures or at lower
temperatures than the specified range. Normal displays and operations may be prevented.
• Do not store the gas monitor in a place exposed to direct sunlight or in a sun-heated car. Normal
displays and operations may be prevented.
• Do not use the gas monitor near a device or equipment that emits strong electromagnetic waves.
• Do not drop or give shock to the gas monitor by, for example, relocating the gas monitor with a water
trap, an optional accessory, attached. The gas inlet may be damaged.
-9-
GX-8000
2 How to Use
2-2. Preparation
2-2. Preparation
(1) Packing check
After opening the package, check the gas monitor and accessories.
If anything in the following list is not included, contact the dealer or Riken Keiki.
Gas monitor GX-8000 and Li-ion battery pack
AC powered charger (only for recharging type)
Gas sampling probe
Gas sampling hose
Shoulder strap
Operating manual
Test certificate
(2) Recharging Li-ion batteries or putting dry batteries
1) Li-ion batteries [Standard type]
When the gas monitor is used for the first time, use the provided AC powered charger to recharge
the batteries. (See Page 22.)
2) Dry batteries type [Option]
When dry batteries are used, put dry batteries in the battery pack. (Three AA alkaline batteries)
(See Page 23.)
(3) Checking connection of the sampling hose
Connect the sampling hose (spiral hose) securely to the gas inlet of the unit.
Attach the gas sampling probe to the end of the sampling hose.
Connect the sampling hose to GAS IN until it
clicks into place.
•
•
•
GX-8000
CAUTION
Use only a sampling hose specified by Riken Keiki.
Use the gas monitor with all of the gas sampling probe, gas
sampling hose (with a float probe), filter tube, etc. connected
so that no foreign matter is drawn into the sampling hose.
Connect a gas sampling probe and a sampling hose by
fastening them manually without using any tool. If they are
fastened too tightly using a tool, the plastic part of the gas
sampling probe may be broken.
- 10 -
2 How to Use
2-3. How to start and exit
2-3. How to start and exit
Keep the POWER/ENTER switch pressed for three seconds or more to turn on the power.
After conducting self diagnosis on power voltage, sensor connection, flow rate and other operations and
functions, the gas monitor enters gas detection mode.
Steps 1. Power-on → Warm-up → Gas concentration reading on the display screen
→ 2. Measurement → 3. Power-off
- 11 -
GX-8000
2 How to Use
2-3. How to start and exit
The operation after power-on is as follows:
GX-8000
- 12 -
2 How to Use
2-4. High-concentration combustible gas zero calibration (TYPE-A and TYPE-E models)
WARNING
Perform AIR calibration in fresh air.
CAUTION
In a location with sudden temperature changes over 15 degrees centigrade, let the gas monitor stand for
about 10 minutes before performing AIR calibration.
2-4. High-concentration combustible gas zero
calibration (TYPE-A and TYPE-E models)
The models that can display combustible gas levels in two ways, "%LEL range" and "vol% range," need
zero calibration using a base gas in order to measure the "vol% range" concentration correctly.
(1) Fill a sampling bag with a base gas (such as N2 and an inert gas).
(2) In a measurement screen, keep the T/RESET switch pressed and press the DISPLAY switch.
Press either the ▲/AIR or T/RESET switch and select VOL Z.CAL.
Zero Point Calibration Screen
(3) Press the POWER/ENTER switch once. The screen is changed to O2 and vol% display and VOL
Z.CAL blinks in the lower row.
Connect the sampling bag containing a base gas to the gas inlet (GAS IN). When the reading is
stabilized, press the POWER/ENTER switch.
Introduction of the base gas
⇒
Blinking
Blinking
(4) When END is displayed, the calibration has been successfully completed. Remove the sampling bag
from the gas inlet.
(5) When FAIL is displayed, the calibration means to be failed.
[If calibration failed at an oxygen concentration of 8% or higher]
Press the T/RESET switch to reset the error.
- 13 -
GX-8000
2 How to Use
2-5. FAIL display
(6) After successful completion of calibration, press the S/AIR or T/RESET switch. When ESCAPE is
displayed, press the POWER/ENTER switch.
Zero Point Calibration Screen
S/AIR or T/RESET switch
Press the POWER/ENTER switch.
(7) The measurement screen is displayed again.
2-5. FAIL display
In normal operation, the screen display changes as shown in the previous section until the gas monitor is
ready for measurement. However, the LCD display screen shows "FAIL" as shown in the following figure if
the self diagnostic function detects an error in the gas monitor before or during measurement. See Page 22
for other FAIL displays and explanation of them.
FAIL display examples
← AIR calibration failed
AIR calibration failed. Press the RESET switch.
If AIR calibration fails again, contact the dealer or Riken Keiki
headquarters or authorized local representative.
← Battery voltage low
The battery voltage is insufficient.
Either recharge or replace the batteries.
← Sensor abnormality
Detection is not possible due to a sensor abnormality. The failed
sensor name is displayed together with FAIL SENSOR. [The display
example shows "CO."]
If this display is shown, request the dealer or Riken Keiki
headquarters or authorized local representative to perform a
maintenance on the gas monitor.
← VOL% zero calibration failed (only TYPE-A and TYPE-E models)
Displayed to indicate a failure in zero point calibration for
high-concentration combustible gas measurement.
Press the RESET switch to reset the error.
Calibration will be successful when the oxygen is less than 8%.
GX-8000
- 14 -
2 How to Use
2-6. Measurement
2-6. Measurement
(1) Measurement method
Bring the gas sampling probe or float probe to the measurement location and read the LCD
measurement display when it stabilizes.
Display example
←
Display example
CH4 concentration: 0%LEL
O2 concentration: 20.9%
CO concentration: 0 ppm
H2S concentration: 0 ppm
Time:
9:30
Battery level:
Full
DANGER
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.
WARNING
• Do not block the buzzer sound hole. No alarm sound can be heard.
• If an oxygen deficiency or toxic gas (CO or H2S) alarm occurs, evacuate the area.
After taking safety precautions, take appropriate actions such as introducing fresh air and sealing the
generation source.
• Do not connect the sampling tube directly to a location with a pressure higher than the atmospheric
pressure. The internal piping system may be damaged.
• If a low battery 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.
CAUTION
• Do not measure anything but air, combustible gases, or a mixture of vapors and toxic gases.
• Do not place 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.
• The gas inlet and outlet of the gas monitor are not water-proof. Be careful not to let water get into
these parts.
• Do not draw in rainwater or other water. Because this may cause trouble and gas cannot be detected.
• Do not drop or give shock to the gas monitor. The water-proof and explosion-proof properties and
accuracy may be deteriorated.
• In a low-temperature environment, the operating time is shortened due to the battery performance property.
• 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 MΩ or less).
• Do not use the gas monitor while recharging it.
• If the combustible gas reading exceeds 100% LEL, the CO reading rises temporarily but this is not an
abnormality.
- 15 -
GX-8000
2 How to Use
2-7. End of measurement
NOTE
• 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.
• Do not wash the gas monitor in a washing machine or ultrasonic cleaner.
• At a low temperature, the response of the LCD display may get slow down.
(2) Precautions on operating environment
Whereas the gas monitor can detect oxygen, combustible gases, hydrogen sulfide, and carbon
monoxide, the measurement environment may include gases that have harmful effects on the sensors
of this unit.
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)
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.
WARNING
• Do not use the gas monitor in the presence of the above gases (such as 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.
• Do not submerge the gas monitor in a liquid other than water. 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.
• Do not jab the buzzer opening with a sharp-pointed item. The unit may malfunction or get damaged,
allowing water or foreign matter, etc. to get inside.
• Do not affix a label on the infrared port. Infrared communications can no longer be conducted.
2-7. End of measurement
Make the gas monitor draw in fresh air. After the display resets to zero (or 20.9% for oxygen), keep the
POWER/ENTER switch pressed until the power is turned off.
If the power is turned off before the display resets to zero (or 20.9% for oxygen), only the pump may operate
(for 30 seconds at the longest).
Count-down
GX-8000
- 16 -
2 How to Use
2-7. End of measurement
CAUTION
• When the gas monitor is contaminated, clean it with a dustcloth, etc. after wetting it in water and
wringing it out well.
• When cleaning the gas monitor, do not splash water over it or use organic solvents such as alcohol
and benzene on it. The surface of the gas monitor may be discolored or damaged.
• When the gas monitor gets wet, water may remain in the buzzer sound opening or clearances.
Drain water as follows:
1. Wipe away moisture on the gas monitor thoroughly using a dry towel, cloth, etc.
2. While holding the gas monitor firmly, shake it about ten times with the buzzer sound opening
facing downward.
3. Wipe away moisture coming out from the inside thoroughly using a towel, cloth, etc.
4. Place the gas monitor on a dry towel, cloth, etc. and let it stand at normal temperatures.
When stored or not in use for a long time, the gas monitor shall be kept under the following environmental conditions:
(1) In a dark place under the normal temperature and humidity away from direct sunlight
(2) In a place where gases, solvents or vapors are not present
Store the gas monitor in a shipping carton, if any, in which the product was delivered.
Store the gas monitor in a plastic bag if the shipping carton is not available.
Store the gas monitor away from dust, etc. if the shipping carton is not available.
CAUTION
• If the gas monitor is not used for a long time, turn on the power at least once every six months and
check that the pump draws in air.
The gas monitor, when not activated for a long time, may cease to work because of hardening of the
grease in the pump motor.
- 17 -
GX-8000
2 How to Use
2-8. Explanation of functions (1)
2-8. Explanation of functions (1)
The gas monitor offers various functions. The functions can be called up using the switches.
(1) S/AIR switch
Press the S/AIR switch to reset the
readings to zero if incorrect readings
are displayed at power-on or during
measurement when there is no gas in
the surroundings. (The oxygen level is
reset to 20.9%.)
(3) T/RESET switch
Press the T/RESET switch to reset a
gas concentration alarm or other alarm
that has occurred after checking it.
(2) DISPLAY switch
Press the DISPLAY switch to change the display screen,
check data, and change settings.
(1) Combustible gas range setting, (2) PEAK value display,
(3) STEL value display, (4) TWA value display, and
(5) Full-scale/Alarm setpoint display
The gas monitor, if not operated
for 20 seconds in any of these
modes, automatically reverts to
the measurement mode.
(4) POWER/ENTER switch
Press the POWER/ENTER switch to
turn on or off the power, change the
settings, etc.
WARNING
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.
CAUTION
• Press the S/AIR switch after checking that a fresh air is present in the surroundings.
• If AIR calibration fails due to a sensor abnormality, a message appears, indicating which sensor failed.
• Do not remove the panel sheet on the LCD display and operation panel. The water-proof and
dust-proof performances will be deteriorated.
GX-8000
- 18 -
2 How to Use
2-9. Explanation of functions (2) DISPLAY switch
2-9. Explanation of functions (2) DISPLAY switch
Press the DISPLAY switch to display various screens. (Figures in the following displays are examples)
1.
Combustible gas range setting 2.
PEAK value display
3.
STEL value display
4.
TWA value display
5.
Full-scale/Alarm setpoint
display
6.
Pump OFF
7.
Station ID selection
8.
Manual memory display
2-10. Combustible gas range switching (TYPE-A and
TYPE-E models)
The models that can display combustible gas levels in two ways, "%LEL range" and "vol% range,"
automatically switch between these two displays according to the gas concentration, from "%LEL range" to
"vol% range" and vice versa.
(1) During vol% range measurement, "vol%" and "No ALARM" displays blink.
(2) If the reading is 3 vol% or less and the oxygen concentration is 19.5% or more during vol% range
measurement, keep the RESET switch pressed to forcibly change the display to the %LEL range.
VOL% range measurement
%LEL range measurement
- 19 -
GX-8000
2 How to Use
2-10. Combustible gas range switching (TYPE-A and TYPE-E models)
(3) Measurement fixed to the vol% or %LEL range
1) Press the DISPLAY switch once.
2)
Press the POWER/ENTER switch to change the setting.
Press the DISPLAY switch if you choose not to change the setting.
3)
Press the S/AIR or T/RESET switch. When ONLY VOL or ONLY LEL is displayed, press the
POWER/ENTER switch.
4)
When END is displayed, the change is completed.
5)
Press the DISPLAY switch seven times to return to the measurement screen.
(4) Switching the vol% or %LEL range back to the automatic range
1) Press the DISPLAY switch once.
2)
Press the POWER/ENTER switch to change the setting.
Press the DISPLAY switch if you choose not to change the setting.
3)
Press the S/AIR or T/RESET switch. When AUTORANG is displayed, press the POWER/ENTER
switch.
GX-8000
- 20 -
2 How to Use
2-11. PEAK value display
4)
When END is displayed, the change is completed.
5)
Press the DISPLAY switch seven times to return to the measurement screen.
WARNING
No gas alarm is triggered in the combustible gas vol% range.
The screen displays No ALARM while no alarm is triggered.
No ALARM display
CAUTION
An oxygen concentration of 10% or more is required for the combustible gas %LEL sensor of the gas
monitor to correctly detect gases and display concentrations. In an atmosphere with an oxygen
concentration less than 10%, the combustible gas vol% sensor may conduct the detection.
2-11. PEAK value display
Press the DISPLAY switch twice during measurement to display the maximum concentration (or minimum
concentration for oxygen) detected during measurement from power-on to the present.
←
Display example
Combustible (methane): 10%LEL
Oxygen:
20.8%
Carbon monoxide:
80 ppm
Hydrogen sulfide:
0 ppm
The PEAK value display automatically reverts to the measurement screen in 20 seconds.
- 21 -
GX-8000
2 How to Use
2-12. STEL value display
2-12. STEL value display
Press the DISPLAY switch three times during measurement to display the STEL value detected after
power-on.
(Only carbon monoxide and hydrogen sulfide)
←
Display example
Carbon monoxide: 80 ppm
Hydrogen sulfide: 0 ppm
The STEL value display automatically reverts to the measurement screen in 20 seconds.
2-13. TWA value display
Press the DISPLAY switch four times during measurement to display the TWA value detected after
power-on.
(Only carbon monoxide and hydrogen sulfide)
←
Display example
Carbon monoxide: 20 ppm
Hydrogen sulfide: 0 ppm
The TWA value display automatically reverts to the measurement screen in 20 seconds.
GX-8000
- 22 -
2 How to Use
2-14. Alarm test (Full-scale/Alarm setpoint display)
2-14. Alarm test (Full-scale/Alarm setpoint display)
(1) Press the DISPLAY switch five times to enter the DISPLAY screen.
Press the POWER/ENTER switch to enter the alarm setpoint display.
To cancel, press the DISPLAY switch.
(2) Press the S/AIR or T/RESET switch to select one of the following screens:
Full scale
First alarm (WARNING)
STEL alarm
TWA alarm
Second alarm (ALARM)
In either of the screens, press the POWER/ENTER switch to conduct alarm test.
(3) After alarm test, press the DISPLAY switch five times to return to the measurement screen.
2-15. Pump OFF
Battery consumption can be reduced by about 40% if the pump is turned OFF while going to a
measurement location or having a break in measurement.
It is recommended to turn off the power if no measurement is performed at least for 10 minutes.
(1) Press the DISPLAY switch six times to enter the PUMP OFF screen.
Press the POWER/ENTER switch to turn the pump OFF.
Press the DISPLAY switch if you choose to cancel the operation.
- 23 -
GX-8000
2 How to Use
2-16. Station ID selection
(2) Press the POWER/ENTER switch to activate the pump and return to pump OFF input standby.
POWER ENTER
Pump stopped
Pump OFF input standby
(3) During pump OFF input standby, press the DISPLAY switch three times to return to the measurement
screen.
2-16. Station ID selection
Station IDs can be used to add preregistered location information to a data logger.
See another manual entitled "Data Logger Management Program Manual" for detailed usage of a data
logger.
Note that selection of a station ID has no influence on concentration results of gas measurement.
(1) Press the DISPLAY switch seven times to enter the station ID selection screen.
Factory-set to
numbers 000 to 255
Press the POWER/ENTER switch to change the station ID.
Press the DISPLAY switch if you choose to cancel the operation.
(2) Press the S/AIR or T/RESET switch to select a station ID.
After selecting a station ID, press the POWER/ENTER switch.
Press the DISPLAY switch if you choose to cancel the operation.
(3) When END is displayed, the change is completed.
GX-8000
- 24 -
2 How to Use
2-17. Manual memory storage and display
2-17. Manual memory storage and display
The data logger automatically stores the gas measurement results at regular time intervals (factory set to
every five minutes). The function to store instantaneous values is called the "manual memory function."
The values stored to the manual memory can be displayed.
[Manual memory storage procedure]
(1) During measurement, keep the T/RESET switch pressed and press the S/AIR switch for one second
or more.
(2) The memory number, storage date, and instantaneous value to be stored are displayed in turn.
Memory number display
Storage date display
Display of an instantaneous value
to be stored
Press the POWER/ENTER switch to execute storage.
(An instantaneous value at the point of time for pressing the switch is stored.)
Press the DISPLAY switch if you choose to cancel the operation.
(3) When END is displayed, the storage is completed.
[Manual memory display procedure]
(1) Press the DISPLAY switch eight times to enter the manual memory display screen.
Press the POWER/ENTER switch to display the values stored to the manual memory.
Press the DISPLAY switch if you choose to cancel the operation.
- 25 -
GX-8000
2 How to Use
2-17. Manual memory storage and display
(2) Press the S/AIR or T/RESET switch to select a memory number.
Storage date
Memory number
(3) Press the POWER/ENTER switch to display a concentration stored to the manual memory.
Stored concentration
Station ID
(4) Press the DISPLAY switch twice to return to the measurement screen.
GX-8000
- 26 -
2 How to Use
2-18. Error (FAIL) display
2-18. Error (FAIL) display
When the sensor or function of the gas monitor fails during measurement, the self diagnostic function
triggers a trouble alarm and displays a FAIL screen corresponding to the relevant alarm.
The suction flow rate is low.
A sensor failed.
The battery voltage is insufficient.
A system (circuit) abnormality
occurred.
The clock failed.
AIR calibration failed.
NOTE
• If the battery voltage is insufficient, recharge or replace the batteries. For other errors, contact the dealer or
Riken Keiki headquarters or authorized local representative.
2-19. Dedicated battery unit
(1) Recharging procedure (Li-ion version only)
1) Open the Recharging jack cover of the gas monitor.
CAUTION
Do not pull the Recharging jack cover too hard.
It may get damaged.
(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
in red. (It takes about three hours 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 Recharging jack of the gas monitor and reattach the
Recharging jack cover. Put the power jack cover as far as it will go.
- 27 -
GX-8000
2 How to Use
2-19. Dedicated battery unit
CAUTION
• Do not use the gas monitor with the power jack cover detached. Dust or water may get into the gas
monitor, causing it to malfunction. Replace the power jack cover if it is damaged.
• If the power 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.
• Use the dedicated AC powered charger.
• Recharge the batteries in a non-hazardous area.
• Disconnect the AC powered charger from the wall electric outlet while it is not in use.
• During recharging, the battery pack may get hot, but this is not an abnormality.
• The temperature of the gas monitor is high immediately after recharging is completed. Let it stand for
10 minutes or more before using it. Otherwise, correct measurements may not be obtained.
• Do not use the gas monitor while recharging it. Correct measurements cannot be obtained.
Furthermore, the batteries get deteriorated more quickly and may have shorter life.
• Recharge the batteries at ambient temperatures from 0 to 40ºC.
• When fully recharged batteries are recharged again, the recharging indicator lamp does not go on.
• The AC powered charger provided with the gas monitor is not water-proof or dust-proof.
• Do not recharge the batteries while the gas monitor is wet.
• Dispose the batteries in accordance with procedure specified by the local authority.
• If the gas monitor of the Li-ion battery type is not used for a long time, it is recommended to store it
after discharging the batteries until the battery level icon shows one battery mark or so. If the gas
monitor is stored with the batteries fully recharged, the batteries get deteriorated more quickly and
may have shorter life.
(2) Battery replacement procedure (Dry battery type only)
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 in a procedure opposite to the one described in Step (1).
GX-8000
- 28 -
2 How to Use
•
•
•
•
•
•
2-19. Dedicated battery unit
CAUTION
Turn off the power of the gas monitor before replacing the batteries.
Replace the batteries in a non-hazardous area.
Use AA alkaline batteries.
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 cover.
• If the gas monitor of the dry battery type is not used for a long time, store it after removing the
batteries.
- 29 -
GX-8000
3 Alarms
3-1. Alarm types and patterns
3
Alarms
3-1. Alarm types and patterns
A gas concentration alarm is notified by blinking of a gas concentration value display, sounding of the
buzzer, and lighting of the lamp when the relevant gas concentration value exceeds the alarm setpoint.
A trouble alarm is notified by error message displaying, buzzer sounding, and lamp lighting when normal
measurement cannot be conducted due to such troubles as a low flow rate.
(1) Gas concentration alarm
Gas alarm types: First alarm (WARNING), second alarm (ALARM), STEL alarm, TWA alarm, and
OVER alarm
(2) Trouble alarms
Trouble alarm types: Flow rate low, sensor abnormality, battery voltage low, circuit abnormality, and
calibration range abnormality
List of gas alarms
Alarm type
First alarm
Second alarm
OVER alarm
TWA alarm
STEL alarm
Oxygen
19.5%
23.5%
40.0%
−
−
Combustible
gas
10%LEL
50%LEL
100%LEL
−
−
Hydrogen
sulfide
5.0ppm
30.0ppm
100.0ppm
10.0ppm
15.0ppm
Carbon
monoxide
25ppm
50ppm
500ppm
25ppm
200ppm
Buzzer
Repeatedly
sounds strong
and weak
beeps at about
one second
intervals:
Beep, beep,
beep, beep
Repeatedly
sounds strong
and weak
beeps at about
0.5 second
intervals:
Blip, blip, blip,
blip
Repeatedly
sounds strong
and weak
beeps at about
0.5 second
intervals:
Blip, blip, blip,
blip
Repeatedly
sounds strong
and weak
beeps at about
one second
intervals:
Beep, beep,
beep, beep
Repeatedly
sounds strong
and weak
beeps at about
one second
intervals:
Beep, beep,
beep, beep
Alarm lamp
Repeatedly
blinks at about
one second
intervals.
Repeatedly
blinks at about
0.5 second
intervals.
Repeatedly
blinks at about
0.5 second
intervals.
Repeatedly
blinks at about
one second
intervals.
Repeatedly
blinks at about
one second
intervals.
LCD display
Gas
concentration
and
WARNING
display blink.
Gas
concentration
and ALARM
display blink.
Gas
concentration
and OVER
display blink.
Gas
concentration
and TWA
display blink.
Gas
concentration
and STEL
display blink.
GX-8000
- 30 -
3 Alarms
3-1. Alarm types and patterns
List of trouble alarms
LCD display
FAIL
LOW FLOW
FAIL
SENSOR
FAIL
BATTERY
FAIL
SYSTEM
FAIL
AIR CAL
Buzzer
Repeatedly
sounds
intermittent
beeps at about
one second
intervals:
Blip, blip, blip,
blip
Repeatedly
sounds
intermittent
beeps at about
one second
intervals:
Blip, blip, blip,
blip
Repeatedly
sounds
intermittent
beeps at about
one second
intervals:
Blip, blip, blip,
blip
Repeatedly
sounds
intermittent
beeps at about
one second
intervals:
Blip, blip, blip,
blip
Repeatedly
sounds
intermittent
beeps at about
one second
intervals:
Blip, blip, blip,
blip
Alarm lamp
Repeatedly
blinks at about
one second
intervals.
Repeatedly
blinks at about
one second
intervals.
Repeatedly
blinks at about
one second
intervals.
Repeatedly
blinks at about
one second
intervals.
Repeatedly
blinks at about
one second
intervals.
Alarm
meaning
The suction
flow rate is
low.
A sensor
failed.
The power
voltage is low.
A circuit
abnormality
occurred.
Calibration
cannot be
conducted.
Details
The gas is not
being drawn
with an
appropriate
flow rate.
Measurement
is not possible
due to a
sensor failure.
Measurement
is not possible
due to a low
battery
voltage.
An
abnormality
occurred in the
internal circuit.
The air or
calibration gas
being drawn is
out of the
calibration
range.
Required
action
Replace the
cotton filter in
the gas
sampling
probe.
Check that
there is no
clogging or
bend in the
sampling
hose. After
replacement,
press the
RESET switch
to restart
measurement.
If the alarm
recurs,
request the
dealer or
Riken Keiki
headquarters
or authorized
local
representative
to repair the
gas monitor.
Replace the
sensor.
Request the
dealer or
Riken Keiki
headquarters
or authorized
local
representative
to do so.
Either
recharge or
replace the dry
batteries with
new ones.
The gas
monitor needs
to be repaired
due to a circuit
abnormality.
Request the
dealer or
Riken Keiki
headquarters
or authorized
local
representative
to do so.
If this display
is shown again
after
conducting the
same
operation, the
gas monitor
has failed.
Request the
dealer or
Riken Keiki
headquarters
or authorized
local
representative
to repair the
gas monitor.
- 31 -
GX-8000
3 Alarms
3-2. User actions for gas concentration alarms
WARNING
No gas alarm is triggered if No ALARM display is shown in the combustible gas vol% display, etc.
No ALARM display
CAUTION
The gas monitor can detect gases even after the due date for equipment readjustment elapses.
However, readjust the equipment and use it in normal operation status unless it is unavoidable.
The gas monitor can detect gases if at least one of the sensors is normal while other sensors are in
"Sensor failed" status. However, repair the equipment and use it in normal operation status unless it is
unavoidable.
3-2. User actions for gas concentration alarms
Leakage of and exposure to spurting gases reaches a dangerous level in a short time. When an alarm is
triggered, evacuate the area immediately.
After taking safety precautions, take appropriate actions.
WARNING
If an oxygen or toxic gas (CO or H2S) alarm occurs, evacuate the area. Oxygen-deficient air or other
gases may blow out there, leading to dangers.
3-3. STEL alarm (short term exposure limit)
A STEL alarm warns of a concentration limit of toxic substances to which everyday exposure of workers for
15 continuous minutes lower than TWA does not have harmful effects on their health.
An alarm is triggered as soon as the one-minute gas concentration average value exceeds the alarm
setpoint for hydrogen sulfide or carbon monoxide while measurement is taken every 15 minutes.
3-4. TWA alarm (time-weighted average limit)
A TWA alarm warns of a time-weighted average concentration limit of toxic substances to which repeated
exposure of workers in average work time of eight hours a day or 40 hours a week does not have harmful
effects on the health of most of the workers.
The gas monitor totals a concentration every minute from power-on and triggers an alarm when the
integrated value exceeds the alarm setpoint for hydrogen sulfide or carbon monoxide.
GX-8000
- 32 -
4 Maintenance
4-1. Daily maintenance
4
Maintenance
Since this is a safety unit, the following maintenance must be regularly performed to maintain performances.
If an abnormality is found in the gas monitor, notify them to the dealer or Riken Keiki headquarters or
authorized local representative promptly.
• Recommend performing span adjustment using a calibration gas at least once every six months.
• Request the dealer or Riken Keiki headquarters or authorized local representative to perform span
adjustment.
WARNING
• This is a safety unit. The management of the gas monitor shall be conducted by a safety officer, and
preventive maintenance of this unit shall be performed.
• The warranty period of sensors is one year after the date of delivery. It is recommended to replace
sensors before the expiration of the warranty period because normal detection may not be possible
after it.
NOTE
• If the gas monitor is dropped, submerged in water, or used out of the ranges of temperatures/humidities and
gas concentrations provided in the specifications, request the dealer or Riken Keiki headquarters or
authorized local representative to perform maintenance.
4-1. Daily maintenance
Alarm function
Check the alarm lamp and buzzer for normal operation. (See Page 21.)
Alarm operations
Have the gas monitor draw a gas with a concentration a little higher than the alarm
setpoint to check that an alarm is triggered.
(Less than twice as high as the setpoint or oxygen with a concentration of 19.5% or
less)
Check that the gas concentration display changes and that, when the alarm setpoint is
exceeded, the alarm lamp blinks and the buzzer sounds.
Filter
•
•
Battery level
Replace the cotton filter in the gas sampling probe when it is contaminated or wet.
(See Page 29.)
Replace the activated carbon filter when it has absorbed water or has a
deteriorated performance.
(See Page 29.)
Check the battery level icon on the LCD screen. If the battery level is getting low,
either recharge them or replace them with new batteries. (See Page 8.)
- 33 -
GX-8000
4 Maintenance
4-2. Span adjustment
4-2. Span adjustment
Perform span adjustment of sensors using a calibration gas at least once every six months.
Calibration of sensors using a calibration gas must be performed at least once every year.
The gas calibration requires dedicated calibration kits and a calibration gases. Request the dealer or Riken
Keiki headquarters or authorized local representative for it.
WARNING
Do not use a lighter gas to check the sensitivity of the gas monitor. A constituent of the lighter gas may
deteriorate the sensor performances.
4-3. Sensor replacement
The built-in sensors of the gas monitor have a validity period (warranty period) and must be replaced
regularly.
The sensor life has expired if, for example, the sensors cannot be calibrated in gas sensitivity calibration,
the readings do not come back after AIR calibration, or the readings fluctuate. Contact the dealer or Riken
Keiki headquarters or authorized local representative.
The warranty period is one year for all the sensors.
4-4. Filter replacement
The gas monitor has various built-in filters.
(1) Gas sampling probe
The gas sampling probe has a built-in cotton filter. Replace the filter when it has absorbed water, has a
low flow rate, or looks significantly contaminated.
Replace this filter.
Turn the white screw part to remove it.
(2) Activated carbon filter
How to replace the activated carbon filter
CAUTION
• Turn off the power of the gas monitor before replacing the activated carbon filter.
• Do not remove the activated carbon filter knob unless the activated carbon filter is to be replaced. If
the activated carbon filter knob is loose (not sufficiently tightened), accurate measurement may not be
possible due to leaks, or water may get inside.
• Use only an activated carbon filter dedicated to the gas monitor (GX-8000). Using a similar product
may have harmful effects on the gas detection performance.
GX-8000
- 34 -
4 Maintenance
4-4. Filter replacement
1)
Using a coin, etc., turn the activated carbon filter knob
counterclockwise (in a direction indicated as OPEN in this figure)
to remove it.
2)
Pull out to remove the filter case from the activated carbon knob.
3)
Replace the two activated carbon filters in the filter case with new
ones.
4)
Attach the filter case to the activated carbon filter knob and put it as
far as it will go.
5)
Attach the activated carbon filter knob to the main unit in an opposite
procedure to Step (1).
Tighten it firmly using a coin, etc.
CAUTION
If the knob is not completely tightened, accurate measurement may not be possible due to leaks, or
water may get inside. The same thing occurs if a minute foreign substance is caught beneath the knob.
- 35 -
GX-8000
4 Maintenance
4-5. Li-ion battery unit or dry battery unit replacement [Option]
4-5. Li-ion battery unit or dry battery unit replacement
[Option]
Battery unit replacement procedure
The gas monitor has a battery unit that can be easily replaced. It is possible to replace the current battery
unit with a spare battery unit or the Li-ion battery unit with a dry battery unit or vice versa.
(1) Loosen the two battery unit screws. (They
need not be completely detached.)
(2) Remove the battery unit and attach
another battery unit.
The battery unit must be attached
straightforwardly with the direction of the
connection terminals aligned, as shown in
the figure on the right.
(3) Tighten the battery unit screws.
CAUTION
• Turn off the power of the gas monitor before replacing the battery unit.
• Detach and reattach the battery unit in a non-hazardous area.
• If the battery unit screws are not completely tightened, the battery units 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.
• Do not damage the rubber seal.
• To maintain the water-proof and dust-proof performances, it is recommended to replace the rubber
seal every two years, whether or not it has an abnormality.
GX-8000
- 36 -
4 Maintenance
4-6. Consumables
4-6. Consumables
Replace the consumables if necessary during maintenance.
Item
Part number
Recommended
check intervals
Recommended
replacement
intervals
Quantity
(pieces
per unit)
Activated carbon filter
(CF-031)
3 months
6 months
2
Dust filter
6 months
6 months 1 year
1
-
2 years
1 set
Tube
6 months
3 - 8 years
1 set
Pump unit (RP-11)
6 months
1 - 2 years
1
Li-ion battery pack
(BP-8000)
-
-
1
Rubber seal
- 37 -
Remarks
About 500
cycles of
charging and
discharging
GX-8000
5 Troubleshooting
4-6. Consumables
5
Troubleshooting
When you suspect a failure, check the gas monitor using the following checklist first, before sending it to the
dealer or Riken Keiki for repair. (If the gas monitor is inoperative, remove all the batteries and reinstall them
before attempting to operate it.)
Symptoms
The power cannot
be turned on.
Causes
The battery level is too
low.
Actions
Li-ion batteries: Recharge the batteries in a
non-hazardous area.
Dry batteries: Replace all the three dry batteries with
new ones.
The power switch was
not pressed long
enough.
For power-on, keep the POWER switch pressed until a
beep is heard (about two seconds).
A system
abnormality is
displayed.
"FAIL SYSTEM"
A circuit abnormality
occurred.
Request the dealer or Riken Keiki local representative
for repair.
A sensor
abnormality is
displayed.
"FAIL SENSOR"
A sensor has failed.
Request the dealer or Riken Keiki local representative
to replace the sensor.
(Only at the initial time, press the RESET switch to
continue the operation using only the normal sensors.)
AIR calibration
failed.
"FAIL AIR"
Fresh air is not supplied
around the gas monitor.
Supply fresh air.
The sensor sensitivity
has deteriorated.
Request the dealer or Riken Keiki local representative
to replace the sensor.
A low battery
voltage is
displayed.
"FAIL BATTERY"
The battery level is low.
Li-ion batteries: Turn off the power and recharge the
batteries in a non-hazardous area.
A low flow rate is
displayed.
"FAIL LOW
FLOW"
Water or oil, etc. was
drawn in.
Check the sampling hose for any damage or mark of
drawn water or oil, etc.
The sampling hose is
clogged.
Check the sampling hose for connections, clogging,
twisting, etc.
The pump has
deteriorated.
Request the dealer or Riken Keiki local representative
to replace the pump.
GX-8000
Dry batteries: Turn off the power and replace the dry
batteries with new ones in a non-hazardous area.
- 38 -
5 Troubleshooting
4-6. Consumables
Symptoms
Causes
Actions
Water remains in
the buzzer sound
hole.
Water was splashed on
the gas monitor.
The batteries
cannot be
recharged.
(Li-ion batteries
only)
The AC powered
charger is not connected
properly.
Connect the AC powered charger to the wall electric
outlet and jack properly.
A recharging circuit
abnormality occurred.
Request the dealer or Riken Keiki local representative
for repair.
(When fully recharged batteries are recharged again,
the recharging indicator lamp does not go on.)
Wipe away moisture on the gas monitor thoroughly
using a dry towel, cloth, etc.
While holding the gas monitor firmly, shake it with the
buzzer sound hole facing downward.
- 39 -
GX-8000
6 Specifications and Others
6-1. GX-8000 specifications
6
Specifications and Others
6-1. GX-8000 specifications
Model
Gas to be
detected
GX-8000
Combustible (CH4 and HC)
Oxygen (O2)
Hydrogen
sulfide (H2S)
Carbon
monoxide (CO)
Detection
principle
Thermal
conductivity
Catalytic
combustion
Galvanic cell
Electrochemical
Electrochemical
Measurement
range
(Minimum
display)
0 - 100vol%
(1vol%)
0 - 100%LEL
(1%LEL)
0 - 40.0%
(0.1%)
0 - 100.0ppm
(0.5ppm)
0 - 500ppm
(1ppm)
Service range
-
-
25.1 - 40.0%
30.5 - 100.0ppm
151 - 500ppm
Gas Alarm:
Alarm type
Self diagnosis alarm:
Gas Alarm:
Alarm operation
Alarm
Self diagnosis alarm:
Intermittent buzzer sounding, lamp blinking, and gas
concentration blinking
Continuous buzzer sounding, lamp lighting, and error detail
display
(Lamp) high-intensity LED and (Buzzer) 95dBA or more/30cm
st
Alarm setpoint
Self-latching, first alarm, second alarm, STEL, TWA, and
OVER
Flow rate low, poor sensor connection, battery voltage low,
circuit abnormality, and calibration range abnormality
None
1 :10%LEL
2nd:50%LEL
st
1 :19.5%
2nd:23.5%
1st:5.0ppm
2nd:30.0ppm
TWA:10.0ppm
STEL:15.0ppm
Detection
system
Pump suction type with a flow rate of 0.75 L/min or more
Display
LCD seven-segment + bar display (divided into 25 units)
Power supply
GX-8000
1st:25ppm
2nd:50ppm
TWA:25ppm
STEL:200ppm
Lithium ion battery unit (3.7V 2900mAh 11Wh) (BUL-8000)
Continuous operating time 12 hours or more (fully charged, without alarms or
lighting, at 25°C)
Recharging time: Three hours until the batteries are fully recharged
Battery unit (three AA batteries) (BUD-8000) (option)
Continuous operating time6 hours or more (new dry batteries, without alarms or
lighting, at 25°C)
- 40 -
6 Specifications and Others
6-2. Combinations of detected gases by type
Model
GX-8000
Operating
environment
Operating temperature range: -20 to 50°C, operating humidity range: below 95%RH
(Non-condensing)
Storage temperature range: -25 to 60°C, storage humidity range: below 95%RH
(Non-condensing)
External
dimensions and
weight
External dimensions: 154*81*127 mm, Weight: About 1.1 kg (BUL-8000 when in use)
Drip-proof and
dust-proof
performances
Certification,
etc.
Functions
Compliant to IP67
Explosion-proof certification: IECEx, ATEX, TIIS, Explosion-proof class: ExiaIICT4
Marine certification: MED, HK
Others: CE marking
Gas alarm, self diagnostic alarm,
zero/span adjustment,
operation check display (pump driving indicator, pilot indicator),
pump stop function,
activating confirmation beep (every one minute by buzzer & LED)
infrared communication function (IrDA),
data logger (interval, alarm trend, and station ID management)
6-2. Combinations of detected gases by type
Five-range type
TYPE A
HC, CH4 vol%
Four-range type
TYPE B
HC, CH4 %LEL O2, CO, H2S
Three-range type
TYPE C
HC, CH4 %LEL O2, H2S
Three-range type
TYPE D
HC, CH4 %LEL O2, CO
Three-range type
TYPE E
HC, CH4 vol%
Two-range type
TYPE F
HC, CH4 %LEL O2
- 41 -
%LEL O2, CO, H2S
%LEL O2
GX-8000
6 Specifications and Others
6-3. GX-8000 accessories
6-3. GX-8000 accessories
Standard
accessories
Optional
accessories
GX-8000
1. Related to power supply
(1): BUL-8000 (Li-ion battery unit), (2) AC powered charger
2. Related to storage
(1) Shoulder strap
3. Related to sampling
(1) Gas sampling hose, 1m (spiral), (2) sampling probe
1. Related to power supply
(1) BUD-8000 (Dry battery unit)
2. Related to storage
(1) Waist strap and belt fixing tool, (2) carrying case (leather), (3) aluminum trunk
case, (4) shipboard storage box (aluminum), (5) sampling probe holder, (6) filter
tube fixing belt
3. Related to sampling
(1) Gas sampling hose (with float probe, 8m), (2) gas sampling hose 30m with
spindle, (3) filter tube, water trap, (4) relay tube
4. Optional accessories related to gas calibration
(1) Set of gas bags (LEL)/(VOL), (2) span cans (LEL)/(VOL)
(3) span cans (CALGAS), (4) demand flow valve, (5) span cans (three-type
mixtures)
5. Others
(1) Data logger management software
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Warranty Policy
RIKEN KEIKI CO., LTD., warrants gas alarm equipment sold by us to be free from defects in materials,
workmanship, and performance for a period of one year from date of shipment from RIKEN KEIKI CO., LTD.,
Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of charge.
This warranty does not apply to those items which by their nature are subject to deterioration or
consumption in normal service, and which must be cleaned, repaired, or replaced on a routine basis.
Warranty is voided by abuse including mechanical damage, alteration, rough handling, or repair procedures
not in accordance with the operator’s manual. This warranty indicates the full extent of our liability, and we
are not responsible for removal or replacement costs, local repair costs, transportation costs, or contingent
expenses incurred without our prior approval.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES AND
REPRESENTATIONS, EXPRESSED OR IMPLIED, AND ALL OTHER OBLIGATIONS OR LIABILITIES
ON THE PART OF RIKEN KEIKI CO., LTD., INCLUDING BUT NOT LIMITED TO, THE WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL RIKEN
KEIKI CO., LTD., BE LIABLE FOR INDIRECT, INCIDENTAL, OR CONSEQUENTIAL LOSS OR
DAMAGE OF ANY KIND CONNECTED WITH THE USE OF ITS PRODUCTS OR FAILURE OF ITS
PRODUCTS TO FUNCTION OR OPERATE PROPERLY.
This warranty covers instruments and parts sold to users by authorized distributors, dealers, and
representatives as appointed by RIKEN KEIKI CO., LTD.
We do not assume indemnification for any accident or damage caused by the operation of this gas monitor,
and our warranty is limited to the replacement of parts or our complete goods.
GX-8000
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