RX-8000
PT0E-1190
Portable HC/O2 Gas Detector
RX-8000
Operating Manual
(PT0-119)
<Contents>
1.
1-1.
1-2.
1-3.
Outline of the Product .............................................................................................. 3
Preface .................................................................................................................... 3
Purpose of use ........................................................................................................ 3
Definition of DANGER, WARNING, CAUTION, and NOTE ..................................... 3
2.
2-1.
2-2.
2-3.
2-4.
Important Notices on Safety .................................................................................... 4
Danger cases .......................................................................................................... 4
Warning cases ......................................................................................................... 6
Names of internal product components ................................................................... 7
Safety information ................................................................................................... 9
3.
3-1.
3-2.
Product Components ............................................................................................... 10
Main unit and standard accessories ........................................................................ 10
Names and functions for each part .......................................................................... 12
4.
4-1.
4-2.
4-3.
4-4.
4-5.
4-6.
4-7.
4-8.
4-9.
4-10.
4-11.
How to Use .............................................................................................................. 14
Before using the gas detector.................................................................................. 14
Preparation for start-up............................................................................................ 14
Basic operating procedures ..................................................................................... 18
How to start the gas detector................................................................................... 19
How to detect .......................................................................................................... 21
Modes...................................................................................................................... 23
Air calibration mode ................................................................................................. 24
Display/setting mode ............................................................................................... 26
Pump OFF mode ..................................................................................................... 29
Manual memory mode ............................................................................................. 30
How to exit............................................................................................................... 31
5.
5-1.
5-2.
Operations and Functions ....................................................................................... 32
Fault alarm pattern .................................................................................................. 32
Other functions ........................................................................................................ 33
6.
6-1.
6-2.
6-3.
6-4.
Maintenance ............................................................................................................ 34
Maintenance intervals and items ............................................................................. 34
Gas calibration ........................................................................................................ 36
How to clean............................................................................................................ 40
Parts replacement ................................................................................................... 41
7.
7-1.
7-2.
7-3.
Storage and Disposal .............................................................................................. 43
Procedures to store the gas detector or leave it for a long time .............................. 43
Procedures to use the gas detector again ............................................................... 44
Disposal of products ................................................................................................ 44
8.
Troubleshooting ....................................................................................................... 45
9.
9-1.
9-2.
Product Specifications ............................................................................................. 47
List of specifications ................................................................................................ 47
List of accessories ................................................................................................... 48
10.
Definition of Terms ................................................................................................... 49
-2-
RX-8000
1 Outline of the Product
1-1. Preface
1
Outline of the Product
1-1. Preface
Thank you for choosing our portable HC/O2 gas detector RX-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 detector and its specifications. It contains information required for
using the gas detector properly. Not only the first-time users but also the users who have already used the
product must read and understand the operating manual to enhance the knowledge and experience before
using the indicator/alarm unit.
1-2. Purpose of use
This product is a portable explosion-proof gas detector that measures the concentration of combustible gas
and oxygen in crude oil vapors, etc. in inert gases or atmosphere.
Detection results are not intended to guarantee life or safety in any way.
Check the specifications before use and conduct gas detection properly in accordance with purposes.
In addition to this operating manual, an operating manual for the data logger management program (option)
is available for the gas detector. Request 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.
-3-
RX-8000
2 Important Notices on Safety
2-1. Danger cases
2
Important Notices on
Safety
2-1. Danger cases
DANGER
<About explosion-proof>
Do not modify or change the circuit or structure, etc.
When measuring the oxygen concentration, do not measure anything but a mixture of air and
combustible gases or vapors and toxic gases.
When using this gas detector 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 detector while standing on a conductive work floor (with a
leakage resistance of 10 M or less).
IP protection class: IP20
* IP20 is a protection class on explosion-proof certification. The IP protection class is compliant
to IP67 level by factory default.
Make sure that the product model on the nameplate is correct.
Inappropriate combinations of models deviate from the range of explosion-proof certification.
The nameplate shows the followings as well as the product model.
Product model
: Main unit: RX-8000
Dry battery unit: BUD-8000 (R)
Lithium ion battery unit: BUL-8000 (R)
Manufacturer
: RIKEN KEIKI Co., Ltd.
Explosion proof class : ExiaIICT4
Ambient temperature : -20 to 50ºC
* The ambient temperature on explosion-proof certification is -20 to
50ºC, and it indicates the temperature range which can maintain the
explosion-proof performance and not the reading accuracy.
Nameplate location
RX-8000
-4-
2 Important Notices on Safety
2-1. Danger cases
DANGER
< About explosion-proof of the main unit>
The battery units that can be connected are the BUL-8000(R) or BUD-8000(R).
The specifications of the gas detector are as follows:
Pump circuit
: Allowable voltage of 4.95 V, allowable current of 1.12 A, and
allowable power of 1138 mW
Infrared detection 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
< About explosion-proof of the battery unit >
The main unit that can be connected is RX-8000 only.
The use with unspecified main units deviates from the range of explosion-proof certification.
The specifications of the BUL-8000(R) are as follows:
Pump circuit
: Maximum voltage of 4.25 V, maximum current of 1.12 A, and
maximum power of 901 mW
Infrared detection 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
The specifications of the BUD-8000(R) are as follows:
Pump circuit
: Maximum voltage of 4.95 V, maximum current of 1.12 A, and
maximum power of 1138 mW
Infrared detection 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 0.715 A, and
maximum power of 733 mW
Power supply
: 4.5 VDC, 150 mA (LR6 3 pcs)
Do not attach and remove the battery unit or batteries in the dry battery unit in a hazardous
location.
Use specified AA alkaline batteries (LR6 TOSHIBA) for the dry battery unit.
< 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 detector.
-5-
RX-8000
2 Important Notices on Safety
2-2. Warning cases
2-2. Warning cases
WARNING
< Sampling point pressure >
The gas detector 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 detector,
detected gases may leak out from its inside and may cause dangerous conditions. Be sure that
excessive pressure is not applied to the detector 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 galvanic cell type sensor because it contains electrolyte. Electrolyte may
cause severe skin burns if it contacts skin, while it may cause blindness if its 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 air calibration is performed in the atmosphere, check the atmosphere for freshness
before beginning the air calibration. If other gases exist, the adjustment cannot be performed
properly, thus leading to dangers when the gas leaks.
< Battery level check >
Before use, check that there remains sufficient battery power. When the gas detector is used for
the first time or is not used for a long period, the batteries may be exhausted. Either fully charge
the batteries or replace them with new ones before use.
If a low battery voltage alarm is triggered, gas detection cannot be conducted. If the alarm is
triggered during use, turn off the power and promptly charge the batteries in a non-hazardous
area.
< Others >
Do not throw the gas detector into fire.
Do not wash the gas detector in a washing machine or ultrasonic cleaner.
Do not block the buzzer sound hole. No alarm sound can be heard.
Do not remove the battery unit while the power is ON.
Do not drop or give shock to the gas detector by, for example, relocating the gas detector with a
water trap, an optional accessory, attached. The gas inlet may be damaged.
RX-8000
-6-
2 Important Notices on Safety
2-3. Names of internal product components
2-3. Names of internal product components
CAUTION
< Do not use the gas detector where it is exposed to oil, chemicals, etc. Do not submerge the gas
detector under water on purpose. >
Do not use in a place where the gas detector is exposed to liquids such as oil and chemicals.
The gas detector, being compliant to IP67, is not water-pressure-resistant. Do not use the gas
detector 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 detector 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 place the gas detector where water or dirt gets accumulated. The gas detector 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 detector is used in an environment where these
elements exist.
< Do not use the gas detector in a place where the temperature drops below -20ºC or rises over
50ºC. >
The operating temperature of the gas detector is -20 to 50ºC. Do not use the gas detector at
higher temperatures, humidities, and pressures or at lower temperatures than the operating
range.
Avoid long-term use of the gas detector in a place where it is exposed to direct sunlight.
Do not store the gas detector in a sun-heated car.
< Observe the operating restrictions to prevent condensation inside the gas detector or gas
sampling hose. >
Condensation formed inside the gas detector 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 detector or gas sampling hose. Please
observe the operating restrictions.
< Do not use a transceiver near the gas detector. >
Radio wave from a transceiver near the gas detector may disturb readings. If a transceiver is
used, it must be used in a place where it disturbs nothing.
Do not use the gas detector 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 detector. >
If the pump driving indicator is not rotating, gas detection cannot be performed properly. Check
whether the flow rate is lost.
< Never fail to perform a regular maintenance. >
Since this is a safety unit, a regular maintenance must be performed to ensure safety.
Continuing to use the detector without performing a maintenance will compromise the sensitivity
of the sensor, thus resulting in inaccurate gas detection.
-7-
RX-8000
2 Important Notices on Safety
2-3. Names of internal product components
CAUTION
< Others >
Pressing switches unnecessarily may change the settings, preventing alarms from activating
correctly. Operate the gas detector using only the procedures described in this operating
manual.
Do not drop or give shock to the gas detector. The water-proof and explosion-proof properties
and accuracy may be deteriorated.
Do not use the gas detector while recharging it.
When you measure concentrations of oxygen in inert gases for a long time, the carbon dioxide
concentration in the air must be 15% or less. When you use the gas detector in the inert gas with
a carbon dioxide concentration of 15% or higher, perform measurement in as short time as
possible. Using the gas detector under high concentrations for a long time may shorten the life of
the oxygen sensor.
RX-8000
-8-
2 Important Notices on Safety
2-4. Safety information
2-4. Safety information
Observe the followings to maintain an explosion-proof system.
<Overseas Specifications>
Outline of the product
This product is a portable explosion-proof gas detector that measures the concentration of
combustible gas and oxygen in crude oil vapors, etc. in inert gases or atmosphere.
Gases are drawn by the built-in pump.
As a power supply, either Li-ion battery unit (BUL-8000(R)) or dry battery unit (BUD-8000(R)) can be
used.
The battery unit can be replaced by users.
Technical data
Explosion-proof
Explosion-proof class ExiaIICT4Ga
specifications
II1GExiaIICT4Ga
Ambient temperature -20 to 50°C
Ambient temperature 0 to 40°C
(for charging)
Electrical
Power supply
About lithium ion battery unit (BUL-8000(R))
specifications
Two Lithium ion cells of BP-8000 (Maxell
INR18650PB1. Um=250V) are connected in parallel
to the Lithium ion battery unit.
About dry battery unit (BUD-8000(R))
TOSHIBA AA alkaline batteries (LR6) can be used.
Maxell CR1220 battery is used for backup.
Certificate
IECEX
IECExDEK13.0091
numbers
ATEX
DEKRA13ATEX0228
Applied
IEC60079-0:2011
standards
IEC60079-11:2011
IEC60079-26:2006
EN60079-0:2012
EN60079-11:2012
EN60079-26:2007
Precautions
Do not charge the Lithium ion battery unit in a
hazardous location.
Charge the Lithium ion battery unit using the
dedicated charger.
Do not replace the battery unit in a hazardous
location.
Do not replace batteries in the dry battery unit in a
hazardous location.
Do not modify or change the circuit or structure, etc.
Use either Lithium ion battery unit (BUL-8000(R)) or
dry battery unit (BUD-8000(R)). Dry batteries used
for the dry battery unit (BUD-8000(R)) are TOSHIBA
AA alkaline batteries (LR6).
How to read
INST.No.0 0 000 0000 00
instruction
AB C D E
number
A: Manufacturing year (0-9)
B: Manufacturing month (1-9, XYZ for Oct.-Dec.)
C: Manufacturing lot
D: Serial number
E: Manufacturing code
Manufacturer
RIKEN KEIKI CO., LTD.
2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744 Japan
Web site: http://www.rikenkeiki.co.jp/
-9-
RX-8000
3 Product Components
3-1. Main unit and standard accessories
3
Product Components
3-1. Main unit and standard accessories
After opening the package, check the main unit and accessories.
If anything in the following list is not included, contact RIKEN KEIKI.
<Main Unit>
RX-8000
main unit
Li-ion battery
unit
<Standard Accessories>
AC powered charger
Gas sampling probe
and gas sampling hose
Filter tube
Relay tube
Shoulder strap
Filter tube fixing belt
Operating manual
Product warranty
:1
:1
:1
:1
:1
:1
DANGER
< About explosion-proof >
Do not modify or change the circuit or structure, etc.
When measuring the oxygen concentration, do not measure anything but a mixture of air and
combustible gases or vapors and toxic gases.
When using this gas detector 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 detector while standing on a conductive work floor (with a
leakage resistance of 10 M or less).
IP protection class: IP20
* IP20 is a protection class on explosion-proof certification. The IP protection class is compliant
to IP67 level by factory default.
< About explosion-proof of the main unit >
The battery units that can be connected are the BUL-8000(R) or BUD-8000(R).
The use with unspecified battery units deviates from the range of explosion-proof certification.
RX-8000
- 10 -
3 Product Components
3-1. Main unit and standard accessories
DANGER
The specifications of the gas detector are as follows:
Pump circuit
: Allowable voltage of 4.95 V, allowable current of 1.12 A, and
allowable power of 1138 mW
Toxic 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
< About explosion-proof of the battery unit >
The main unit that can be connected is RX-8000 only.
The use with unspecified main units deviates from the range of explosion-proof certification.
The specifications of the BUD-8000(R) are as follows:
Pump circuit
: Maximum voltage of 4.95 V, maximum current of 1.12 A, and
maximum power of 1138 mW
Infrared detection 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, 150 mA (LR6 3 pcs)
The specifications of the BUL-8000(R) are as follows:
Pump circuit
: Maximum voltage of 4.25 V, maximum current of 1.12 A, and
maximum power of 901 mW
Infrared detection 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
Do not attach and remove the battery unit or batteries in the dry battery unit in a hazardous
location.
Use specified AA alkaline batteries (LR6 TOSHIBA) for the dry battery unit.
NOTE
There are the following two combinations of
battery units. The following information is printed
on the battery unit for the sake of identification to
prevent a mistake in combinations.
Lithium ion battery unit: BUL-8000(R)
Dry battery unit: BUD-8000(R)
Additionally, a nameplate indicating a compatible
model is affixed on the top of the battery unit.
Check this information and use a correct
combination.
- 11 -
RX-8
Printing for
identification
RX-8000
3 Product Components
3-2. Names and functions for each part
3-2. Names and functions for each part
<Main Unit>
(1) LCD display
(3) Alarm LED arrays
(4) Infrared communication port
(2) Buzzer sound
opening
(3) Alarm LED arrays
(3) Alarm LED arrays
(5)
(7) PEAK/ESC switch
/AIR switch
(8) POWER/ENTER switch
(6)
(2) Buzzer sound opening
/PUMP switch
(10) Gas outlet
(9) Gas inlet
(11) Recharging jack cover
(12) Recharging indicator lamp
(13) Battery unit screws
Name
Function
(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.
Keep this switch pressed to perform fresh air calibration. It is used
to increase numerical values.
(5)
/AIR switch
(6)
/PUMP switch
(7)
PEAK/ESC 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 detector. (Do not block it.)
(11)
Recharging jack cover
(12)
Recharging indicator lamp
(13)
Battery unit screws
RX-8000
Turns on and off the pump. It is used to decrease numerical values.
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.
Turn these screws to detach and replace the battery unit.
- 12 -
3 Product Components
3-2. Names and functions for each part
CAUTION
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 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.
< LCD Display >
(1) Pilot indicator
(4) Pump driving
indicator
(5) Oxygen
concentration
digital and bar
(2) Combustible gas
concentration
digital and bar display
(3) Battery level icon
Name
Function
(1)
Pilot indicator
Displays the operating status in the detection mode. Normal: Blinking
(2)
Combustible gas
concentration
digital and bar display
Displays the gas concentration as a numeric value and a level in the bar
graph.
(3)
Battery level icon
Displays the battery level. See the information below for the meanings of
battery level icons.
(4)
Pump driving indicator
Displays the drawing status in the detection mode. Normal: Rotating
(5)
Oxygen concentration
digital and bar display
Displays the gas concentration as a numeric value and a level in the bar
graph.
NOTE
The meanings of battery level icons are as follows:
Sufficient /
:Low
/
:Needs charging
If the battery level is lower than the above, the inside of the battery icon starts to blink (
).
NOTE
The gas alarm function is an optional setting.
When NO ALARM lights up, no gas alarm pattern is performed.
No ALARM display
- 13 -
RX-8000
4 How to use
4-1. Before using the gas detector
4
How to Use
4-1. Before using the gas detector
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 detector, 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 main unit, relay tube, filter tube, gas sampling hose, and gas sampling probe are connected
properly in this order.
Check that the battery level is sufficient.
Check that the filter and filter tube in the gas sampling probe are free of dust or clogging.
Check that there is no bend or hole in the gas sampling hose and relay tube.
< Recharging of Batteries >
When the gas detector is used for the first time, or when the battery level is low, be sure to use the
accessory AC powered charger to charge the batteries.
CAUTION
Use the dedicated AC powered charger.
Charge the battery unit in a non-hazardous area.
Charge the battery unit at ambient temperatures between 0 to 40ºC.
Do not use the gas detector while charging it. Correct measurements cannot be obtained.
Furthermore, the batteries get deteriorated more quickly and may have shorter life.
The charger is neither water-proof nor dust-proof. Do not recharge the batteries while the gas
detector is wet.
The AC powered charger is not explosion-proof.
- 14 -
RX-8000
4 How to Use
4-2. Preparation for start-up
(1) Open the charging jack cover of the gas detector.
CAUTION
Do not pull the charging jack cover too hard. It may get
damaged.
Insert the plug of the AC
powered charger into the
recharging jack.
Recharging
jack
Plug
(2) Put the plug of the AC powered charger into the recharging
jack of the gas detector.
AC powered
(3) Connect the AC powered charger to the wall electric outlet.
charger
When charging is started, the charging indicator lamp lights up
(red).
(Charging time: Three hours at the maximum until the
batteries are fully charged)
(4) When charging is completed, the charging indicator lamp goes off.
(5) When charging 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 detector and reattach the recharging jack cover. Put the
charging jack cover as far as it will go.
CAUTION
Do not use the gas detector with the recharging jack cover detached. Dust or water may get into
the gas detector, causing it to malfunction. Replace the charging jack cover if it is damaged.
If the charging 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 knob.
Disconnect the AC powered charger from the wall electric outlet while it is not in use.
NOTE
During recharging, the battery pack may get hot, but this is not an abnormality.
The temperature of the gas detector is high immediately after charging is completed. Allow at least 10
minutes or more for the unit to cool down 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.
<Attaching Batteries>
(when the optional dry battery unit BUD-8000(R) is used)
When the gas detector is used for the first time, or when the battery level is low, attach new AA alkaline
batteries.
CAUTION
<Replacement>
Turn off the power of the gas detector 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.
Chargeable batteries cannot be used.
- 15 -
RX-8000
4 How to Use
4-2. Preparation for start-up
(1) Using a flathead screwdriver or coin, turn the battery
cover fixing screw counterclockwise to open the battery
cover.
Battery cover
Battery cover fixing
screw
(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.
Polarity indication
of batteries
Batteries
<Releasing and Attaching the Battery Unit>
(1) Loosen the two battery unit screws.
(They need not be completely detached.)
(2) Detach the battery unit.
(3) Attach a new battery unit.
Connection
terminal
Battery unit screw
NOTE
Make sure that the battery unit is installed in correct orientation by
checking the locations of the connection terminal and projection
portions.
(4) Securely tighten the two battery unit screws.
Bottom of Gas
Detector
CAUTION
Turn off the power of the gas detector before replacing the battery unit.
Attach and remove the battery unit in a non-hazardous area.
If the battery unit screw is not completely tightened, the battery unit 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.
RX-8000
- 16 -
4 How to Use
4-2. Preparation for start-up
<Connection of Gas Sampling Probe and Gas Sampling Hoses>
Attach the gas sampling hose to the gas sampling probe.
Connect the relay tube, filter tube, gas sampling hose, and gas sampling probe in this order securely to
the gas inlet (GAS IN) of the main unit.
NOTE
Connect each part, such as to the gas inlet (GAS IN), until it
clicks into place to ensure connection.
CAUTION
Use only a gas sampling hose specified by RIKEN KEIKI.
Use the gas detector with the gas sampling probe connected so that no foreign substance is
drawn into it.
Connect a gas sampling probe and a gas 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.
- 17 -
RX-8000
4 How to Use
4-3. Basic operating procedures
4-3. Basic operating procedures
Normally, the detection mode is used for normal operations. (The detection mode is activated after the
power is turned on.)
<<Detection Mode>>
LCD
AIR (long pressing)
<<Fault Alarm Status>>
<<Air Calibration Mode>>
(Self-latching)
+
PEAK+
(long pressing)
<<Span Calibration Mode>>
<<Manual Memory Mode>>
PEAK
<<Display/Setting Mode>>
PUMP (long pressing) : Stop operation
PUMP (short pressing) : Resume
ti
<<Pump ON/OFF Setting>>
RX-8000
- 18 -
4 How to Use
4-4. How to start the gas detector
4-4. How to start the gas detector
Keep the POWER switch pressed for three seconds or more to turn on the power.
After the display automatically switches between Date/Time, Battery Voltage, and others and self diagnosis
is conducted, the gas detector enters the detection mode.
<<Start-up Procedure>>
Keeping the POWER switch
pressed for three seconds or
more
LCD display
* Keep it pressed until the alarm
lamp lights up and the buzzer
sounds once (Beep).
All LCDs Light Up.
Date/Time Display
Battery Voltage Display
Gas Name Display
Full Scale Display
ID Display
- 19 -
RX-8000
4 How to Use
4-4. How to start the gas detector
Checking connection of filters
After checking the connection of
filters, press the ENTER switch.
* Until confirmed, the confirmation
screens are displayed in turn as
shown in the above picture.
Warm-up
Warm-up is performed for about
30 seconds.
The number displayed in the
center of the screen starts
counting down.
* The buzzer sounds twice (Beep,
beep).
Detection Mode
CAUTION
After start-up, perform air calibration before performing gas detection (See "4-7. Air calibration
mode").
NOTE
A sensor abnormality alarm is issued before the detection mode is entered if there is any abnormality
in the sensor. Press the
switch. This will reset the sensor abnormality alarm temporarily, set the gas
concentration display that was abnormal on the sensor to ---, and start gas detection. However, notify
the abnormality to RIKEN KEIKI promptly. Gas for which there was an abnormality in the sensor
cannot be detected. However, the alarm cannot be reset if there is an abnormality in all the sensors.
If there is an abnormality in the built-in clock, a fault alarm FAIL CLOCK may be issued. Press the
switch. The fault alarm is temporarily reset, and measurement is started with incorrect clock time.
NOTE
At a low temperature, the pump may need to be warmed up.
In this case, the screen will be as shown on the right after the battery voltage is
displayed (Max 60 seconds).
RX-8000
- 20 -
4 How to Use
4-5. How to detect
4-5. How to detect
In the detection mode, put the gas sampling probe close to the detection area and take the reading on the
display.
<- Display example
HC concentration: 0.0%LEL
O2 concentration: 20.9%
Battery level: Sufficient
* HC: The acronym of HydroCarbons. In this gas
detector, combustible gas concentration is
displayed in isobutane conversion.
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.
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 detector.
When measuring the oxygen concentration, do not measure anything but a mixture of air and
combustible gases or vapors and toxic gases.
WARNING
The gas detector 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 detector,
detected gases may leak out from its inside and may cause dangerous conditions. Be sure that
excessive pressure is not applied to the detector while used.
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.
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.
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based on
your judgment.
Before use, check that there remains sufficient battery power. When the gas detector is used for
the first time or is not used for a long period, the batteries may be exhausted. Either fully charge
the batteries or replace them with new ones before use.
If a low battery alarm occurs, gas detection cannot be conducted. If the alarm is triggered during
use, turn off the power and promptly charge the batteries in a non-hazardous area.
Do not block the buzzer sound hole. No alarm sound can be heard.
- 21 -
RX-8000
4 How to Use
4-5. How to detect
CAUTION
Before performing gas detection, attach the gas sampling probe provided with the gas detector
to prevent disturbances by air dust.
When you measure concentrations of oxygen in inert gases for a long time, the carbon dioxide
concentration in the air must be 15% or less. When you use the gas detector in the inert gas with
a carbon dioxide concentration of 15% or higher, perform measurement in as short time as
possible. Using the gas detector under high concentrations for a long time may shorten the life of
the oxygen sensor.
NOTE
In a low-temperature environment, the operating time is shortened due to the battery performance
property.
At a low temperature, the response of the LCD display may get slow down.
If a combustible gas with a higher concentration than %LEL is drawn, some gas may remain in the gas
sampling hose due to adsorption in the hose, gas sampling probe, etc. After drawing a
high-concentration combustible gas, clean the gas detector to remove the adsorbed gas (draw fresh
air and check that the reading becomes zero).
Performing fresh air calibration before cleaning it completely will result in inaccurate adjustment, giving
adverse influence on measurement. In such a case, remove the gas sampling hose before performing
fresh air calibration to avoid inaccurate adjustment.
NOTE
<About Range Switching Point>
The display automatically switches to the vol% range when the concentration of a detected combustible
gas exceeds 100%LEL. When the concentration drops, the display returns to the %LEL range again. The
following shows an example of switching timing.
Diagram example of gas concentrations and range switching timing
HC
concentration
100%LEL
(1.8 vol%)
%LEL range
vol% range
Switching point
%LEL range
Switching point
* HC: The acronym of HydroCarbons. Because combustible gas concentration is displayed in isobutane
conversion in this detector, the range switching point is LEL 1.8 vol% of isobutane.
RX-8000
- 22 -
4 How to Use
4-6. Modes
4-6. Modes
Details on each mode are provided as follows.
Mode
Detection Mode
-
Item
LCD display
Concentration display
Details
Normal state
Air Calibration
Mode
-
AIR CAL
Performs the zero adjustment.
Display and
Setting Mode
Peak Display
PEAK
Displays the maximum concentration (or
minimum concentration for oxygen
display) detected during measurement
from power-on to the present.
Full Scale
Display/Alarm
Setpoint
Display/Alarm
Test
[Optional
Setting]
Clock Display
ALARM-P
* The gas alarm function is an optional
setting.
ID Display
ID
Displays an ID if it has been set in
advance. Also used to change or set an
ID.
Log Data
Display
REC.DATA
Displays data recorded to the manual
memory.
Pump OFF
Mode
-
PUMP OFF
Used to turn on/off the pump operations.
Manual Memory
Mode
-
REC.DATA
Any instantaneous value can be
recorded.
Displays the current time.
- 23 -
RX-8000
4 How to Use
4-7. Air calibration mode
4-7. Air calibration mode
Detection Mode
Keep the AIR switch
pressed.
When the AIR switch is kept
pressed, the display
changes to AdJ - HOLD AIR.
When RELEASE is
displayed, release the AIR
switch.
Detection Mode
When the air calibration is
successfully completed, it
returns to the detection
mode.
WARNING
When the air calibration is performed in the atmosphere, check the atmosphere for freshness before
beginning the air calibration. If other gases exist, the adjustment cannot be performed properly, thus
leading to dangers when the gas leaks.
CAUTION
Perform air calibration under pressure and temperature/humidity conditions close to those in the
operating environment and in fresh air.
Perform air calibration after the reading is stabilized.
If there is a sudden temperature change of 15 or more between the storage and operation
locations, turn on the power of the gas detector, let it leave for about 10 minutes in a similar
environment to the operation location, and perform air calibration in fresh air before using it.
RX-8000
- 24 -
4 How to Use
4-7. Air calibration mode
NOTE
If the air calibration fails, FAIL - AIR CAL is displayed along with the name of
gas sensor which has become faulty.
Press the
switch to reset the fault alarm (calibration failure). In this case,
the value before calibration is displayed.
If HC sensor is faulty
- 25 -
RX-8000
4 How to Use
4-8. Display/setting mode
4-8. Display/setting mode
This mode allows you to change various displays and settings.
Every time the PEAK switch is pressed, various screens are displayed in turn.
NOTE
The gas detector automatically returns to the detection mode in about 20 seconds if the gas detector is left
unoperated.
LCD display
Detection Mode
Display/Setting Mode
Peak Display
Displays the maximum
concentration (or minimum
concentration for oxygen) detected
during measurement from power-on
to the present.
* The gas alarm
function is an
optional setting.
Full Scale Display/Alarm Setpoint
Display/Alarm Test [Optional setting]
Clock Display
ID Display/Selection
Displays an ID if it has been
registered in advance. Also used to
select an ID.
ENTER
switch
Log Data Display
Displays concentration data
recorded to the manual memory.
ENTER
switch
To Detection Mode
RX-8000
- 26 -
ID Display/Selection
=> P27
Log Data Display
=> P28
4 How to Use
4-8. Display/setting mode
<ID Display/Selection "ID SELECT">
Display and select an ID that has been registered in advance.
(1) Press the PEAK switch and select the ID display/selection from the display/setting mode menu.
The following screens are displayed in turn on the gas detector.
(2) Press the ENTER switch to set or select an ID.
NOTE
If you do not want to set or select an ID, press the ESC switch to return to the display/setting mode
menu.
On the gas detector, either of the IDs from ST-ID000 to ST-ID127 has been registered, unless
otherwise specified.
The data logger management program (option) is required to register or change an ID. Please contact
RIKEN KEIKI.
(3) Press either the
or
switch to select an ID.
Every time the
or
switch is pressed, the ID number increases or decreases (000-127).
Display example
(4) Press the ENTER switch.
(5) When END is displayed, the setting is completed.
The display/setting mode menu is displayed again.
(6) After completion, press the PEAK switch several times until it returns to the detection mode.
- 27 -
RX-8000
4 How to Use
4-8. Display/setting mode
<Log Data Display "REC.DATA">
Display concentration data recorded to the manual memory.
(1) Press the PEAK switch and select the log data display from the display/setting mode menu.
The following screens are displayed in turn on the gas detector.
(2) Press the ENTER switch to display the log data.
NOTE
If you do not want to display the log data, press the ESC switch to return to the display/setting mode menu.
(3) Every time the
or
switch is pressed, the log data menus are displayed in turn.
Press either the or
switch to select log data that you want to check. The log data menu displays the
year, month, day, time, and memory number.
Display example
(4) Press the ENTER switch to display the selected log data.
Display example
(5) If you want to display other log data, press the ENTER switch to return to the log data menu. Repeat the
steps (3) to (5).
(6) After completion, press the PEAK switch several times until it returns to the detection mode.
RX-8000
- 28 -
4 How to Use
4-9. Pump OFF mode
4-9. Pump OFF mode
This mode allows you to stop the pump operation only.
Detection Mode
Keep the PUMP switch
pressed for about three
seconds to stop the pump
operation only.
Pump OFF Mode
Only the pump operation is
stopped.
Press the PUMP switch
shorty to resume the pump
operation.
WARNING
When PUMP OFF is set, no alarm is triggered whatever happens.
The gas detector does not automatically return to the detection mode if PUMP OFF is set.
NOTE
When the pump operation is stopped, the buzzer sounds twice (beep, beep) about every three minutes.
- 29 -
RX-8000
4 How to Use
4-10. Manual memory mode
4-10. Manual memory mode
Any instantaneous value during measurement can be recorded.
Up to 256 points of data can be recorded. When the number of recorded data points reaches the maximum,
recorded data will be overwritten, starting from the oldest data.
(1) In the detection mode, press the PEAK and
switches simultaneously for about a second to enter the
manual memory mode. The following screens are displayed in turn on the gas detector.
NOTE
The screen displays the memory number, date, and instantaneous value in turn. Go to the next step to
execute recording. No value is recorded at this point yet. If you do not want to record a value, press the
ESC switch to return to the detection mode.
If the Display and Setting Mode or Air Calibration Mode screen is displayed because the timing of
pressing the PEAK and
switches is off, release the both switches and then try again.
(2) Press the ENTER switch. The date and the instantaneous value at the time when the ENTER switch is
pressed are recorded.
(3) When END is displayed, the recording is completed.
It automatically returns to the detection mode.
RX-8000
- 30 -
4 How to Use
4-11. How to exit
4-11. How to exit
Make the gas detector draw in fresh air. After the display returns to zero (or 20.9% for oxygen), keep the
POWER switch pressed until the power is turned off.
NOTE
If the display is not zero when the power is turned off, a purge operation may be
performed for 30 seconds at the maximum to clean the inside of the gas
detector.
- 31 -
RX-8000
5 Operations and Functions
5-1. Fault alarm pattern
5
Operations and Functions
5-1. Fault alarm pattern
Fault alarm: Triggered when an abnormality is detected in the gas detector. <<Self-latching>>
Alarm display: Notifies by display of error messages, sounding of the buzzer, and lighting of the lamp.
Alarm types: Low flow rate, sensor abnormality, battery voltage low, system abnormality, and calibration
failure
Determine the causes and take appropriate actions.
If the gas detector has problems and is repeatedly malfunctioning, contact RIKEN KEIKI immediately.
<Display Operation>
LCD display
Displays an error message.
Alarm lamp
Repeatedly blinks at about one second intervals.
Buzzer
Repeatedly sounds intermittent beeps at about
one second intervals:
Blip, beep, blip, beep
Display example
NOTE
To reset a low flow rate alarm (FAIL LOW FLOW), remove the cause of the low flow rate, and then
press the RESET switch.
For information on malfunctions (error messages), see "8. Troubleshooting".
RX-8000
- 32 -
5 Operations and Functions
5-2. Other functions
5-2. Other functions
<Calibration History/Various Trend/Event History Functions>
The gas detector has history and trend functions. To use these functions, please contact RIKEN KEIKI.
NOTE
The data logger management program (option) is required to use the history and trend functions. Please
request RIKEN KEIKI.
- 33 -
RX-8000
6 Maintenance
6-1. Maintenance intervals and items
6
Maintenance
The gas detector is an important instrument for the purpose of safety.
To maintain the performance of the gas detector and improve the reliability of safety, perform a regular
maintenance.
6-1. Maintenance intervals and items
Daily maintenance: Perform maintenance before beginning to work.
Monthly maintenance: Perform alarm test once a month.
Regular maintenance: Perform maintenance once or more every six months to maintain the
performance as a safety unit.
Maintenance
item
Battery level
check
Concentration
display check
Maintenance content
Daily
maintenan
ce
Monthly
mainten
ance
-
-
Regular
mainten
ance
Check that the battery level is sufficient.
Make the gas detector draw in fresh air. Check that
the concentration display value is zero (or 20.9
vol% on the oxygen deficiency meter). When the
reading is incorrect, perform the air calibration
after ensuring that no other gases exist around it.
Flow rate check See the flow rate indicator to check for
abnormalities.
Filter check
Check the dust filter for dust or clogging.
Span adjustment Perform the span adjustment by using the
calibration gas.
<About Maintenance Services>
We provide services on regular maintenance including span adjustment, other adjustments and
maintenance.
To make the calibration gas, dedicated tools, such as a gas cylinder of the specified concentration and
gas sampling bag must be used.
Our qualified service engineers have expertise and knowledge on the dedicated tools used for services,
along with other products. To maintain the safety operation of the indicator/alarm unit, please use our
maintenance service.
The followings are typical maintenance services. For details, please contact RIKEN KEIKI.
RX-8000
- 34 -
6 Maintenance
6-1. Maintenance intervals and items
Main services
Battery level
check
Concentration
display check
:
Checks the battery level.
:
Flow rate check
:
Filter check
:
Span adjustment
Cleaning and
repair of device
(visual
diagnosis)
Device operation
check
Replacement of
consumable
parts
:
:
Verifies that the concentration display value is zero (or 20.9 vol% on the oxygen deficiency
meter) by using the zero gas.
Performs the air calibration if the reading is incorrect.
Checks the flow rate indicator to find abnormalities.
Checks the flow rate by using an external flow meter to verify the correctness of the flow rate
indicator on the gas detector. If the flow rate is incorrect, performs the flow rate adjustment.
Checks the dust filter for dust or clogging.
Replaces a dirty or clogged dust filter.
Performs the span adjustment by using the calibration gas.
Checks dust or damage on surface of the gas detector, cleans and repairs such parts of the
gas detector.
Replaces parts which are cracked or damaged.
:
Uses the keys to check the operation of functions and parameters.
:
Replaces consumable parts, such as a sensor, filter and pump.
- 35 -
RX-8000
6 Maintenance
6-2. Gas calibration
6-2. Gas calibration
Perform span adjustment of sensors using a calibration gas at least once every six months.
The span adjustment requires dedicated equipment and a calibration gas. Request RIKEN KEIKI for it.
<Required Equipment/Material>
Calibration gas (low-concentration combustible gas for %LEL and high-concentration combustible gas
for vol%)
Calibration gas (nitrogen gas for O2)
Set of gas sampling bags (for %LEL and vol%)
Set of gas sampling bags (for O2)
<Connection>
Connect the equipment as shown below to perform the span adjustment.
GAS IN
Gas
sampling
bag
GAS OUT
(Open)
Main unit
RX-8000
WARNING
About the span gas
The span gas is a hazardous gas (toxicity, oxygen deficient, etc.). Handle the gas and related jigs
and tools with due care.
* Inhaling the gas must be avoided, the gas sampling bag must be free of holes, etc.
About the place for span adjustment
Perform span adjustment where no silicon, organic solvent, spray can gases, etc. is used.
Perform span adjustment indoors at normal temperatures without remarkable fluctuation (within
±5°C).
Perform span adjustment in an exhaust booth.
CAUTION
The gas outlet (GAS OUT) must be left open without any pipe connected for atmosphere release.
RX-8000
- 36 -
6 Maintenance
6-2. Gas calibration
<Span Adjustment>
Perform the span adjustment using the procedure shown below.
(1) Prepare the calibration gases (for %LEL, vol%, and O2) and a set of gas sampling bags.
(2) Remove the filter tube, gas sampling hose, etc. to allow the gas sampling bag to be directly connected to
the gas inlet (GAS IN).
(3) Check that the gas detector is in the detection mode.
Detection Mode
(4) Perform the air calibration. * See "4-7. Air calibration mode".
(5) Collect each calibration gas in each gas sampling bag.
(6) Press the
and
(ONE CAL).
switches simultaneously for about a second to enter the span adjustment mode
HC %LEL adjustment
HC vol% adjustment
O2 adjustment
ESCAPE
WARNING
After the adjustment is completed, do not forget to return to the detection mode.
If the monitor remains in the regular maintenance mode, it does not automatically return to the
detection mode.)
NOTE
If the Air Calibration Mode screen is displayed because the timing of pressing the and switches is
off, release the both switches and then try again.
In the span adjustment mode, select the concentration display that can be adjusted with the
or
switch.
Press the ESC switch to abort the running operation.
To return from the span adjustment mode to the detection mode, select ESCAPE and then press the
ENTER switch.
- 37 -
RX-8000
6 Maintenance
6-2. Gas calibration
(7) Use the
or
switch to select HC %LEL.
Press the ENTER switch to enter the HC %LEL span adjustment mode. * The concentration display
blinks.
(8) Connect the gas sampling bag in which the %LEL calibration gas was collected to the gas inlet to supply
the gas to the gas detector. Wait for the concentration display value to be stabilized.
(9) When it is stabilized, adjust the concentration display value to calibration gas concentration value by
pressing the
or
switch. Press the ENTER switch to confirm it. When END is displayed, the
HC %LEL span adjustment is completed. Remove the gas sampling bag.
(10) Then, use the
or
switch to select HC vol%.
Press the ENTER switch to enter the HC vol% span adjustment mode. * The concentration display
blinks.
(11) Connect the gas sampling bag in which the vol% calibration gas was collected to the gas inlet to supply
the gas to the gas detector. Wait for the concentration display value to be stabilized.
(12) When it is stabilized, adjust the concentration display value to calibration gas concentration value by
pressing the or switch. Press the ENTER switch to confirm it. When END is displayed, the HC vol%
span adjustment is completed. Remove the gas sampling bag.
RX-8000
- 38 -
6 Maintenance
6-2. Gas calibration
(13) Then, use the
or
switch to select O2.
Press the ENTER switch to enter the O2 span adjustment mode. * The concentration display blinks.
(14) Connect the gas sampling bag in which the O2 calibration gas was collected to the gas inlet to supply
the gas to the gas detector. Wait for the concentration display value to be stabilized.
(15) When it is stabilized, adjust the concentration display value to calibration gas concentration value by
pressing the
or
switch. Press the ENTER switch to confirm it. When END is displayed, the O2 span
adjustment is completed. Remove the gas sampling bag.
(16) Use the
or
switch to select ESCAPE.
Press the ENTER switch to return to the detection mode. Exit the span adjustment.
- 39 -
RX-8000
6 Maintenance
6-3. How to clean
6-3. How to clean
Clean the gas detector if it becomes extremely dirty. The gas detector must be turned off while cleaning it.
Use a waste cloth to remove dust. Do not use water or organic solvent for cleaning because they may cause
malfunctions.
Because an extremely large amount of dust inside the gas sampling hose may disturb the gas detection, it
must be cleaned with dry air, etc.
CAUTION
When cleaning the gas detector, do not splash water over it or use organic solvents such as alcohol
and benzene on it. The surface of the gas detector may be discolored or damaged.
NOTE
When the gas detector gets wet, water may remain in the buzzer sound opening or clearances. Drain
water as follows:
(1) Wipe away moisture on the gas detector thoroughly using a dry towel, cloth, etc.
(2) While holding the gas detector 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 detector on a dry towel, cloth, etc. and let it stand at normal temperatures.
RX-8000
- 40 -
6 Maintenance
6-4. Parts replacement
6-4. Parts replacement
<Replacement of Consumables>
Sensor Replacement
The built-in sensors of the gas detector have a validity period and must be replaced regularly (within one
year).
The sensor life has expired if, for example, the sensors cannot be calibrated in span adjustment, the
readings do not come back after fresh air calibration, or the readings fluctuate. Request RIKEN KEIKI for
repair. Recommended replacement intervals are five years for the combustible gas sensor and one year for
the oxygen sensor.
Dust Filter Replacement Procedure
Because the dust filter may gradually get dirty or clogged over the time, it must be replaced regarding the
operating conditions. Check the dust filter, and then replace it as necessary.
Gas sampling probe
The gas sampling probe has a built-in dust filter. Replace the filter when it has absorbed water, has a low
flow rate, or looks significantly contaminated.
(1) Hold the transparent part and turn the tip (white) to remove it.
(2) Take out the filter from the transparent part and insert a new filter.
CAUTION
Make sure that the filter is inserted in correct orientation.
Replacement
(3) Attach the tip that has been removed.
- 41 -
RX-8000
6 Maintenance
6-4. Parts replacement
<Replacement of Regular Replacement Parts>
List of recommended regular replacement parts
Item
Maintenance Replacement
intervals
intervals
Internal filter
6 months
Dust filter (for the gas
sampling probe)
Water-proof filter(10 pcs
for filter tube)
Absorbent cotton (25 g for
filter tube)
Tubes
Combustible gas sensor
(DE-3123-4)
Oxygen sensor (OS-BM1)
Pump unit (RP-11)
Rubber seals
Li-ion battery pack (for
BUL-8000(R))
Alkaline dry battery
6 months
Quantity
(pieces per
unit)
1
6 months
6 months
6 months 1 year
6 months 1 year
6 months 1 year
6 months 1 year
3 - 8 years
5 years
6 months
6 months
-
1 year
1 - 2 years
2 years
-
1
1
A set
1
-
-
3
6 months
6 months
Remarks
*
1
Part number 0904 0257 60
1
Part number 4777 9022 50
1.3 g
Part number 1879 0011 10
A set
1
*
*
*
*
*
About 500 cycles of
charging and discharging *
AA
* The operation must be checked after replacement by a qualified service engineer. For the stable
operation of the gas detector and safety, ask a qualified service engineer to take care of replacement of
the parts whose operation must be checked. Request RIKEN KEIKI for operation check.
NOTE
The above replacement intervals are recommendation only. The intervals may change depending on the
operating conditions. These intervals do not mean the warranty periods either. The result of the daily or
regular maintenance may determine when to replace the parts.
RX-8000
- 42 -
7 Storage and Disposal
7-1. Procedures to store the gas detector or leave it for a long time
7
Storage and Disposal
7-1. Procedures to store the gas detector or leave it for
a long time
The gas detector must be stored under the following environmental conditions.
In a dark place under the normal temperature and humidity away from direct sunlight
In a place where gases, solvents or vapors are not present
Store the gas detector in a shipping carton, if any, in which the product was delivered.
Store the gas detector away from dust, etc. if the shipping carton is not available.
WARNING
If the gas detector with a dry battery unit is not used for a long time, store it after removing the
batteries. Battery leaks may result in fire or injury. If the gas detector is not used for a short time,
store it without removing the batteries. While the power of the gas detector is OFF, the sensor is
energized at all times. Therefore, it is necessary to store the gas detector with the batteries in it.
CAUTION
If the gas detector 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 (about three minutes). The gas detector, when not activated for a
long time, may cease to work because of hardening of the grease in the pump motor.
NOTE
If the gas detector with a lithium ion battery unit 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
detector is stored with the batteries fully recharged, the batteries get deteriorated more quickly and
may have shorter life.
- 43 -
RX-8000
7 Storage and Disposal
7-2. Procedures to use the gas detector again
7-2. Procedures to use the gas detector again
CAUTION
When you use a stopped or stored gas detector again, never fail to perform a gas calibration. For
information on readjustment including gas calibration, please contact RIKEN KEIKI.
7-3. Disposal of products
When the gas detector is disposed of, it must be treated properly as an industrial waste in accordance
with the local regulations.
WARNING
Do not disassemble the galvanic cell type sensor because it contains electrolyte. Electrolyte may
cause severe skin burns if it contacts skin, while it may cause blindness if its 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.
Dispose the batteries in accordance with procedure specified by the local authority.
When disposing of the gas detector in EU member states, sort the batteries as specified. Handle the
removed batteries according to the classified refuse collection system and recycling system based on
the regulations of EU member states.
Contact RIKEN KEIKI for disposal.
Removing batteries
See Section 4-2 "Preparation for start-up" and take out the batteries.
For BUL-8000(R)
Model
BUL-8000(R)
Type
Lithium ion battery
NOTE
BUL-8000(R) contains batteries.
Crossed-out recycle dustbin mark
This symbol mark is indicated on the products which contain the batteries which fall under EU Battery
Directive 2006/66/EC. Such batteries need to be disposed of as specified by the latest Directive.
This symbol mark indicates that the batteries need to be separated from the ordinary waste and disposed of
appropriately.
RX-8000
- 44 -
8 Troubleshooting
7-3. Disposal of products
8
Troubleshooting
The troubleshooting does not explain the causes of all the malfunctions which occur on the gas
detector. This simply helps to find the causes of malfunctions which frequently occur. If the gas
detector shows a symptom which is not explained in this manual, or still has malfunctions even
though remedial actions are taken, please contact RIKEN KEIKI.
<Abnormalities on Unit>
Symptoms
The power cannot
be turned on.
Causes
The battery level is too
low.
Actions
Lithium ion battery unit: Charge the battery unit in a
non-hazardous area.
Dry battery unit: Replace all the three dry batteries with the
new ones in a non-hazardous area.
The power switch was
not pressed long
enough.
Improper installation of
the battery unit
For power-on, keep the POWER switch pressed until a beep
is heard (about two seconds).
Abnormal
operations
Disturbances by sudden
surge noise, etc.
Turn off and restart the indicator/alarm unit.
Key operations are
disabled.
Disturbances by sudden
surge noise, etc.
System
abnormalities
FAIL SYSTEM
Sensor
abnormalities
FAIL SENSOR
A circuit abnormality
occurred.
In a non-hazardous area, remove the battery unit once, and
reinstall the battery unit, and turn on the power to perform
operations.
Request RIKEN KEIKI for repair.
A sensor has failed.
Request RIKEN KEIKI to replace the sensor.
(Only at power-on, press the RESET switch to continue the
operation using gas sensors except the sensor which has
failed.)
A low battery
voltage alarm is
triggered.
FAIL BATTERY
The battery level is low.
Lithium ion battery unit: Turn off the power and charge the
battery unit in a non-hazardous area.
A low flow rate
alarm is triggered.
FAIL LOW FLOW
Water or oil, etc. was
drawn in.
Check the gas sampling hose for any damage or mark of
drawn water or oil, etc.
The gas sampling hose
is clogged.
Check the gas sampling hose for connections, clogging,
twisting, etc.
The gas detector was
powered on at a low
temperature or has not
been used for a long
time.
The pump has
deteriorated.
Turn on the power several times. The pump may start
operating.
Check whether the battery unit is properly attached to the
main unit.
Dry battery unit: Turn off the power and replace the dry
batteries with new ones in a non-hazardous area.
Request RIKEN KEIKI to replace the pump.
- 45 -
RX-8000
8 Troubleshooting
Air calibration
impossible
FAIL AIR CAL
Clock
abnormalities
FAIL CLOCK
The batteries
cannot be
recharged.
(Lithium ion
battery unit only)
7-3. Disposal of products
Fresh air is not supplied
around the gas detector.
Supply fresh air.
Abnormalities of the
internal clock
Make a setting of Date/Time.
If such a symptom is observed repeatedly, the built-in clock
is seemingly malfunctioning. Thus, it must be replaced.
Request RIKEN KEIKI for replacement.
Connect the AC powered charger to the wall electric outlet
and jack properly.
The charger is not
connected properly.
A charging circuit
abnormality occurred.
The batteries have been
fully charged.
Request RIKEN KEIKI for repair.
When fully charged batteries are charged again, the
charging indicator lamp does not go on.
<Abnormalities of Readings>
Symptoms
The reading rises
(drops) and it
remains so.
Causes
Drifting of sensor output
Presence of interference
gas
Slow leak
Environmental changes
Slow response
Span adjustment
impossible
RX-8000
Clogged dust filter
Bended or clogged gas
sampling hose
Condensation is formed
inside the gas sampling
hose.
Deteriorated sensor
sensitivity
Improper calibration gas
concentration
Deteriorated sensor
sensitivity
Actions
Perform the air calibration.
Check if any interference gas, such as solvent, etc., is
present and take an appropriate action.
A very small amount of the gas to be detected may be
leaking (slow leak). Ignoring it may cause dangers.
Perform the air calibration.
In particular, the galvanic cell type is affected by the air
pressure.
Replace the dust filter.
Fix the defective parts.
Fix the defective parts.
Replace the sensor with a new one.
Use the proper calibration gas.
Replace the sensor with a new one.
- 46 -
9 Product Specifications
9-1. List of specifications
9
Product Specifications
9-1. List of specifications
<Overseas Specifications>
Detection principle
Gas to be detected
Detection range
<Service range>
Display resolution
Accuracy of the
reading
Response time
Concentration
display
Detection method
Suction flow rate
Displays
Buzzer sound
volume
Fault alarm/self
diagnosis
Fault alarm display
Fault alarm pattern
Transmission
specifications
Functions
Power supply
Continuous
operating time
Operating
temperatures
Operating
humidities
Structure
Explosion-proof
structure
Explosion-proof
class
Galvanic cell type
(OS)
Oxygen (O2)
0 to 25 vol%
<to 40 vol%>
0.1 vol%
Within ±0.7 vol%
Non-dispersive infrared type (RI)
Combustible gas (HC) *1
0 to 100%LEL/to 100 vol%
0.5%LEL (to 100%LEL)/0.5vol% (to 100 vol%)
Within ±5%LEL (to 100%LEL)
Within ±5vol% or ±10% of the reading (to 100 vol%)
90% response: within 30 seconds *2
90% response:
within 20 seconds
*2
90% response:
90% response: within 2 minutes *3
within 2 minutes *3
LCD digital (seven-segment + Symbol + Bar meter)
Pump suction type
0.75 L/min or more (Open flow rate)
Battery level icon, pilot indicator, and pump operation status indicator
95 dB (A) or higher (30 cm)
System abnormalities, sensor abnormalities, battery voltage drop, calibration failure,
and low flow rate
Lamp blinking, intermittent buzzer sounding, and detail display
Self-latching
IrDA (for data logger)
LCD backlight, data logger, peak display, log data display, and pump stop
Dedicated lithium ion battery unit [BUL-8000(R)]
(Dedicated dry battery unit <AA alkaline dry batteries x 3> [BUD-8000(R)] can also
be used.)
BUL-8000(R): About 15 hours (25°C, no alarm, no lighting, and battery fully charged)
BUD-8000(R): About 10 hours (25°C, no alarm, and no lighting)
-20 to +50°C
Below 95% RH (Non-condensing)
Drip-proof and dust-proof performances (compliant to IP67 level)
Intrinsically safe explosion-proof structure
II1GExiaIICT4Ga(ATEX/IECEx<DEKRA>)
- 47 -
RX-8000
9 Product Specifications
Explosion-proof
certification
number
External
dimensions
Weight
9-2. List of accessories
DEKRA13ATEX0228(ATEX)/IECExDEK13.0091(IECEx)
Approx. 154 (W) x 81 (H) x 127 (D) mm (projection portions excluded)
About 1.1 kg (when BUL-8000(R) is used) or about 1.0 kg (when BUD-8000(R) is
used)
*1 HC: The acronym of HydroCarbons. In this gas detector, combustible gas concentration is displayed in
isobutane conversion.
*2 When introducing the gas from the gas inlet of the main unit
*3 When introducing the gas from the tip of the gas sampling hose (30 m) (option)
9-2. List of accessories
Standard
accessories
Optional
accessories
RX-8000
Lithium ion battery unit (BUL-8000(R)): 1 (Attached to the main unit)
AC powered charger: 1
Gas sampling probe and gas sampling hose: 1
Filter tube: 1
Relay tube: 1
Shoulder strap: 1
Filter tube fixing belt: 1
Operating manual
Product warranty
Dry battery unit (BUD-8000(R))
Waist strap
Carrying case (leather)
Sampling probe holder
Aluminum trunk case
Shipboard storage box (metal)
Gas sampling hose (with float probe, 8 m)
Gas sampling hose 30 m with plummet
Water trap
Relay tube
Set of gas sampling bags (for %LEL/vol%)
Span cans
Demand flow valve
Data logger management program
LCD protection film
- 48 -
10 Definition of Terms
9-2. List of accessories
10
Definition of Terms
vol%
LEL
Gas concentration indicated in the unit of one-hundredth of the volume
The acronym of Lower Explosion Limit.
LEL refers to the lowest concentration of a combustible gas in air capable of
causing explosion when ignited.
- 49 -
RX-8000
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