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73-0618
User manual
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RKI Instruments 73-0617, 73-0617C, 73-0616C, 73-0618, 73-0615 User manual

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PT0E-1194
Portable Gas Detector
RX-8000
Operating Manual
(PT0-119)
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<Contents>
1. Outline of the Product ........................................................................................................... 2
1-1. Preface .............................................................................................................................. 2
1-2. Purpose of use .................................................................................................................. 2
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE ............................................... 3
2. Important Notices on Safety ................................................................................................. 4
2-1. Danger cases .................................................................................................................... 4
2-2. Warning cases .................................................................................................................. 6
2-3. Names of internal product components ............................................................................. 7
2-4. Safety information (Applicable for ATEX/IECEx) ............................................................... 9
3. Product Components ............................................................................................................ 10
3-1. Main unit and standard accessories .................................................................................. 10
3-2. Names and functions for each part ................................................................................... 12
4. How to Use ........................................................................................................................... 14
4-1. Before using the gas detector ........................................................................................... 14
4-2. Preparation for start-up ..................................................................................................... 14
4-3. Basic operating procedures............................................................................................... 18
4-4. How to start the gas detector ............................................................................................ 19
4-5. How to detect .................................................................................................................... 21
4-6. Modes ............................................................................................................................... 23
4-7. Air calibration mode ........................................................................................................... 24
4-8. Display/setting mode ......................................................................................................... 26
4-9. Pump OFF mode ............................................................................................................... 29
4-10. Manual memory mode .................................................................................................... 30
4-11. How to exit ....................................................................................................................... 31
5. Operations and Functions .................................................................................................... 32
5-1. Fault alarm pattern ............................................................................................................ 32
5-2. Other functions .................................................................................................................. 33
6. Maintenance ......................................................................................................................... 34
6-1. Maintenance intervals and items ....................................................................................... 34
6-2. Gas calibration .................................................................................................................. 36
6-3. How to clean ..................................................................................................................... 40
6-4. Parts replacement ............................................................................................................. 41
7. Storage and Disposal ........................................................................................................... 43
7-1. Procedures to store the gas detector or leave it for a long time ........................................ 43
7-2. Procedures to use the gas detector again ......................................................................... 44
7-3. Disposal of products .......................................................................................................... 44
8. Troubleshooting .................................................................................................................... 45
9. Product Specifications .......................................................................................................... 47
9-1. List of specifications .......................................................................................................... 47
9-2. List of accessories ............................................................................................................. 48
10. Definition of Terms .............................................................................................................. 49
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- 1 - RX-8000
1 Outline of the Product 1-1. Preface
1
Outline of the Product
1-1. Preface
Thank you for choosing our portable 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. There are 4 kinds of line up for this mode. 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.
Product line up
Product Detectable gas
Combustible (HC) Combustible (CH4) Oxygen (O2)
RX-8000 (HC/O2) RX-8000 (CH4/O2) ­RX-8000 (HC) RX-8000 (CH4) ­HC : Isobutane (i-C4H10) calibration
〇
〇
-
〇 〇
- -
〇
〇
-
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- 2 - RX-8000
1 Outline of the Product 1-3. Definition of DANGER, WARNING, CAUTION, and NOTE
1-3. Definition of DANGER, WARNING, CAUTION, and
NOTE
This message indicates that improper handling may cause serious damage on
DANGE R
WARNING
CAUTION
NOTE
life, health or assets.
This message indicates that improper handling may cause serious damage on health or assets.
This message indicates that improper handling may cause minor damage on health or assets.
This message indicates advice on handling.
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- 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. 【RX-8000】 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 MΩ 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 (TC20782) Dry battery unit: BUD-8000(R)(TC20783) Lithium ion battery unit: BUL-8000(R)(TC20784),BUL-8000(R1)(TC21112) Manufacturer : RIKEN KEIKI Co., Ltd. Explosion proof class : 【RX-8000】Ex ia IIC T4
【BUL-8000(R), BUL-8000(R1), BUD-8000(R)】 Ex ia IIC T4 Ambient temperature : -20 to 50ºC Charging terminal rating : 【BUL-8000(R), BUL-8000(R1)】 Allowable voltage AC250V 50/60Hz Warnings : 【BUL-8000(R), BUL-8000(R1), BUD-8000(R)】 Inhibit to take off
battery unit in non-hazardous area.
Nameplate location
RX-8000
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- 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)(TC20784), BUL-8000(R1)(TC21112)
or BUD-8000(R)(TC20783).
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
Ambient temperature :-20degree C to +50degree C
< About explosion-proof of the battery unit > The main unit that can be connected is RX-8000(TC20782) only.
The use with unspecified main units deviates from the range of explosion-proof certification.
The specifications of the BUL-8000(R), BUL-8000(R1) 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 Ambient temperature : -20degree C to +50degree C *Chargin has to be done with the dedicated AC adaptor in non-hazardous area. And, the temperature should be beteen 0degree C and +40degree C.
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) Ambient temperature : -20degree C to +50degree C
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.
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- 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 -
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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.
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- 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 -
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2 Important Notices on Safety 2-4. Safety information (Applicable for ATEX/IECEx)
2-4. Safety information (Applicable for ATEX/IECEx)
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), BUL-8000(R1)) or dry battery unit
(BUD-8000(R)) can be used.
The battery unit can be replaced by users.
Technical data
Explosion-proof specifications
Electrical specifications
Certificate numbers
Applied standards
Precautions
How to read instruction number
Manufacturer
Explosion-proof class ExiaIICT4Ga
II1GExiaIICT4Ga Ambient temperature -20 to 50°C Ambient temperature (for charging) Power supply
IECEX IECExDEK13.0091 ATEX DEKRA13ATEX0228
0 to 40°C
About lithium ion battery unit (BUL-8000(R),
BUL-8000(R1)) 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.
IEC60079-0:2011
IEC60079-11:2011
IEC60079-26:2006
EN60079-0:2012
EN60079-11:2012
EN60079-26:2007
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),
BUL-8000(R1)) or dry battery unit (BUD-8000(R)).
Dry batteries used for the dry battery unit
(BUD-8000(R)) are TOSHIBA AA alkaline batteries
(LR6).
INST.No.0 0 000 0000 00 A B C D E A: Manufacturing year (0-9) B: Manufacturing month (1-9, XYZ for Oct.-Dec.) C: Manufacturing lot D: Serial number E: Manufacturing code
RIKEN KEIKI CO., LTD. 2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744 Japan Web site: http://www.rikenkeiki.co.jp/
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- 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
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 MΩ 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)(TC20784), BUL-8000(R1)(TC21112)
or BUD-8000(R) (TC20783). The use with unspecified battery units deviates from the range of explosion-proof certification.
<Standard Accessories>
AC powered charger : 1 Gas sampling probe
and gas sampling hose : 1
 Filter tube(CF-8385) : 1  Relay tube : 1  Shoulder strap : 1  Filter tube fixing belt : 1  Operating manual  Product warranty
RX-8000 - 10 -
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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 Ambient temperature :-20 degree C to +50 degree C
< About explosion-proof of the battery unit > The main unit that can be connected is RX-8000(TC20782) 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) Ambient temperature :-20 degree C to +50 degree C
The specifications of the BUL-8000(R), BUL-8000(R1)(TC21112) 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 Ambient temperature :-20 degree C to +50 degree C
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)(TC20784)
BUL-8000(R1)(TC21112)
Dry battery unit : BUD-8000(R)(TC20783)
Additionally, a nameplate indicating a compatible model is affixed
on the top of the battery unit.
Check this information and use a correct combination.
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- 11 - RX-8000
Printing for identification
3 Product Components 3-2. Names and functions for each part
3-2. Names and functions for each part
<Main Unit>
(3) Alarm LED arrays
(4) Infrared communication port
(3) Alarm LED arrays
(2) Buzzer sound opening
(3) Alarm LED arrays
(1) LCD display
(5) ▲/AIR switch
(6) ▼/PUMP switch
(10) Gas outlet
Name Function
(7) PEAK/ESC switch
(8) POWER/ENTER switch
(11) Recharging jack cover
(13) Battery unit screws
(2) Buzzer sound opening
(9) Gas inlet
(12) Recharging indicator lamp
(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
(5) ▲/AIR switch
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.
(6) ▼/PUMP switch Turns on and off the pump. It is used to decrease numerical values.
(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
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.
(13) Battery unit screws Turn these screws to detach and replace the battery unit.
RX-8000
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- 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
(2) Combustible gas
concentration digital and bar display
(3) Battery level icon
Name Function
(4) Pump driving
indicator
(5) Oxygen
concentration digital and bar
(1) Pilot indicator Displays the operating status in the detection mode. Normal: Blinking
Combustible gas
(2)
concentration digital and bar display
(3) Battery level icon
(4) Pump driving indicator Displays the drawing status in the detection mode. Normal: Rotating
Oxygen concentration
(5)
digital and bar display
Displays the gas concentration as a numeric value and a level in the bar graph.
Displays the battery level. See the information below for the meanings of battery level icons.
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
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- 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 Li-ion battery unit BUL-8000(R), BUL-8000(R1) are used)
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.
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- 14 - RX-8000
4 How to Use 4-2. Preparation for start-up
p
j
A
(1) Open the charging jack cover of the gas detector.
CAUTION
Do not pull the charging jack cover too hard. It may get damaged.
(2) Put the plug of the AC powered charger into the recharging
jack of the gas detector.
(3) Connect the AC powered charger to the wall electric outlet.
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
owered charger from the wall electric outlet while it is not in use.
Recharging
ack
C powered
charger
Plug
Insert the plug of the AC powered charger into the recharging jack.
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 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.
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- 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
Battery cover
Battery cover f ixing screw
cover.
(2) Paying attention to the polarities of batteries, replace all
the three batteries with new ones.
(3) Close the battery cover and tighten the battery cover
fixing screw.
Batteries
Polarity indication of 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.
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.
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.
Connection terminal
Battery unit screw
Bottom of Gas
Detector
RX-8000
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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.
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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>>
<<Fault Alarm Status>>
(Self-latching)
PEAK+▲
<<Manual Memory Mode>>
LCD
AIR (long pressing)
<<Air Calibration Mode>>
▼+▲ (long pressing)
<<Span Calibration Mode>>
PEAK
<<Display/Setting Mode>>
PUMP (long pressing) : Stop operation PUMP (short pressing) : Resume
<<Pump ON/OFF Setting>>
RX-8000
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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 All LCDs Light Up.
* Keep it pressed until the alarm
lamp lights up and the buzzer sounds once (Beep).
↓
Date/Time Display
↓
Battery Voltage Display
↓
Gas Name Display
↓
Full Scale Display
↓
ID Display
↓
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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.
↓
Warm-up Warm-up is performed for about 30 seconds. The number displayed in the center of the screen starts counting down.
⇔
* Until confirmed, the confirmation
screens are displayed in turn as shown in the above picture.
↓
Detection Mode
* The buzzer sounds twice (Beep,
beep).
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 -
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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.
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- 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 / CH4
concentration
100%LEL (HC:1.8vol%) (CH4 5.0vol%
* HC: The acronym of HydroCarbons. Because combustible gas concentration is displayed in isobutane or
CH4 conversion in this detector, the range switching point is LEL 1.8 vol% of isobutane or 5.0% of methane respectively.
%LEL range
Switching point
vol% range
Switching point
%LEL range
RX-8000 - 22 -
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4 How to Use 4-6. Modes
4-6. Modes
Details on each mode are provided as follows.
Mode Item LCD display Details
Detection Mode - Concentration display Normal state
Air Calibration Mode
Display and Setting Mode
- AIR CAL Performs the zero adjustment.
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 Tes t [Optional Setting] Clock Display Displays the current time.
ID Display ID Displays an ID if it has been set in
ALARM-P * The gas alarm function is an optional
setting.
advance. Also used to change or set an ID.
Log Data Display
Pump OFF Mode
Manual Memory Mode
- PUMP OFF Used to turn on/off the pump operations.
- REC.DATA Any instantaneous value can be
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REC.DATA Displays data recorded to the manual
memory.
recorded.
- 23 - RX-8000
4 How to Use 4-7. Air calibration mode
g
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 leadin
CAUTION
Perform air calibration under pressure and temperature/humidity conditions close to those in the
Perform air calibration after the reading is stabilized. If there is a sudden temperature change of 15℃ or more between the storage and operation
to dangers when the gas leaks.
operating environment and in fresh air.
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 -
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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
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- 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.
↓
↓
Full Scale Display/Alarm Setpoint Display
/Alarm Test [Optional setting]
* The gas alarm
function is an 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
ID Display/Selection => P27
Log Data Display Displays concentration data recorded to the manual memory.
↓
To Detection Mode
RX-8000 - 26 -
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→
ENTER
switch
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.
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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 -
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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.
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- 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 -
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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.
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- 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.
Repeatedly sounds intermittent beeps at about
Buzzer
CAUTION
When in FAIL LOW FLOW, the pump stops working for pump protection. To reset a low flow rate alarm (FAIL LOW FLOW), remove the cause of the low flow faik, and
then press the RESET switch. In case pushing RESET swithch without removing cause of the
low flow fail, the pump re-start working and water or other material might be sucked inside
detector.
one second intervals: Blip, beep, blip, beep
Display example
NOTE
For information on malfunctions (error messages), see "8. Troubleshooting".
RX-8000 - 32 -
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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.
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- 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
Flow rate check See the flow rate indicator to check for
Filter check Check the dust filter for dust or clogging. ○ ○ ○ Span adjustment Perform the span adjustment by using the
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.
abnormalities.
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.
Maintenance content Daily
maintenan
ce
○ ○ ○
○ ○ ○
- - ○
Monthly mainten
ance
Regular mainten
ance
RX-8000 - 34 -
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6 Maintenance 6-1. Maintenance intervals and items
Main services
Battery level check Concentration display check
Flow rate check : Checks the flow rate indicator to find abnormalities.
Filter check : Checks the dust filter for dust or clogging.
Span adjustment : Performs the span adjustment by using the calibration gas. Cleaning and repair of device (visual diagnosis) Device operation check Replacement of consumable parts
: Checks the battery level.
: 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 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.
Replaces a dirty or clogged dust filter.
: 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.
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- 35 - RX-8000
6 Maintenance 6-2. Gas calibration
8000
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.
WARNING
About the span gas The span gas is a hazardous gas (combustible, 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 or collect exhaust gas with sampling bag.
CAUTION
The gas outlet (GAS OUT) must be left open without any pipe connected for atmosphere release.
Gas
sampling
bag
GAS IN
Main unit RX-
GAS OUT
Exhasut booth or collect gas with sampling bag.
RX-8000 - 36 -
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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 ▼ switches simultaneously for about a second to enter the span adjustment mode
(ONE CAL).
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.
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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 -
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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.
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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 -
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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.
(3) Attach the tip that has been removed.
Dry cotton inside CF-8385 Replacement Procedure
1) Cut dry cotton with the size listed left.
Pipe holder Tube
Filter
Absorbent
Dry cotten
cotton
(Weight approx1.3g)
2) Loosen and remove the cap.
3) Replace dry cotton to new one, and fill .
the interspace with dry cotton
4) Tighten the cap again.
Pipe
Cap(Black color)
Absorbent cotton
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- 41 - RX-8000
6 Maintenance 6-4. Parts replacement
Water proof filter Replacement Procedure
(1) Loosen the cap(black color).
Cap(Black color)
(2) Remove the filter and replace to new one.
Joint
O-ring
(3) Tighten the cap again.
Cap(Black color)
Filter
Mesh side should be on O-ring side.
<Replacement of Regular Replacement Parts>
List of recommended regular replacement parts
Item Maintenance
intervals
Internal filter 6 months 6 months -
Dust filter
6 months 6 months ­(for the gas sampling probe) Water-proof filter
6 months 6 months ­(10 pcs for filter tube) Absorbent cotton
6 months 6 months ­(25 g for filter tube) Tubes 6 months 3 - 8 years A set * Combustible gas sensor
6 months 5 years 1 * (DE-3123-4 / DE-3113-13) Oxygen sensor (OS-BM1) 6 months 1 year 1 * Pump unit (RP-11) 6 months 1 - 2 years 1 * Rubber seals - 2 years A set * Li-ion battery pack
- - 1 About 500 cycles of
(for BUL-8000(R),
BUL-8000(R1))
Alkaline dry battery - - 3 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.
Replacement
intervals
1 year
1 year
1 year
1 year
Quantity
Remarks
(pieces per
unit)
1 *
1 Part number 0904 0257 60
1 Part number 4777 9022 50
1.3 g Part number 1879 0011 10
charging and discharging *
RX-8000
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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 leav e 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.
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7 Storage and Disposal 7-2. Procedures to use the gas detector again
p
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
When disposing of the gas detector in EU member states, sort the batteries as specified. Handle the
Removing batteries See Section 4-2 "Preparation for start-up" and take out the batteries.
For BUL-8000(R), BUL-8000(R1)
NOTE
BUL-8000(R), BUL-8000(R1) contains batteries. Crossed-out recycle dustbin mark
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.
Dis
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.
Model Type BUL-8000(R) BUL-8000(R1)
ose the batteries in accordance with procedure specified by the local authority.
Lithium ion battery
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 -
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8 Troubleshooting 7-3. Disposal of products
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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 Causes The power cannot
be turned on.
bnormal
operations
Key operations are disabled.
System abnormalities FAIL SYSTEM Sensor abnormalities FAIL SENSOR
The battery level is too low.
The power switch was not pressed long enough. Improper installation of the battery unit
Disturbances by sudden surge noise, etc.
Disturbances by sudden surge noise, etc.
circuit abnormality
occurred.
sensor has failed. Request RIKEN KEIKI to replace the sensor.
ctions
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.
For power-on, keep the POWER switch pressed until a beep is heard (about two seconds).
Check whether the battery unit is properly attached to the main unit.
Turn off and restart the indicator/alarm unit.
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.
(Only at power-on, press the RESET switch to continue the operation using gas sensors except the sensor which has failed.)
low battery voltage alarm is triggered. FAIL BATTERY
low flow rate alarm is triggered. FAIL LOW FLOW
The battery level is low. Lithium ion battery unit: Turn off the power and charge the
battery unit in a non-hazardous area.
Dry battery unit: Turn off the power and replace the dry batteries with new ones in a non-hazardous area.
Water or oil, etc. was drawn in.
The gas sampling hose is clogged.
The gas detector was powered on at a low temperature or has not been used for a long time. The pump has deteriorated.
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Check the gas sampling hose for any damage or mark of drawn water or oil, etc.
Check the gas sampling hose for connections, clogging, twisting, etc.
Turn on the power several times. The pump may start operating.
Request RIKEN KEIKI to replace the pump.
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8 Troubleshooting 7-3. Disposal of products
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ir calibration impossible FAIL AIR CAL Clock abnormalities FAIL CLOCK
The batteries cannot be recharged. (Lithium ion battery unit only)
Fresh air is not supplied around the gas detector.
bnormalities of the
internal clock
The charger is not connected properly.
charging circuit abnormality occurred. The batteries have been fully charged.
Supply fresh air.
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.
Request RIKEN KEIKI for repair.
When fully charged batteries are charged again, the charging indicator lamp does not go on.
<Abnormalities of Readings>
Symptoms Causes Actions The reading rises (drops) and it remains so.
Slow response Clogged dust filter Replace the dust filter.
Span adjustment impossible
Drifting of sensor output Perform the air calibration. Presence of interference gas Slow leak A very small amount of the gas to be detected may be
Environmental changes Perform the air calibration.
Bended or clogged gas sampling hose Condensation is formed inside the gas sampling hose. Deteriorated sensor sensitivity Improper calibration gas concentration Deteriorated sensor sensitivity
Check if any interference gas, such as solvent, etc., is present and take an appropriate action.
leaking (slow leak). Ignoring it may cause dangers.
In particular, the galvanic cell type is affected by the air pressure.
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.
RX-8000 - 46 -
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9 Product Specifications 9-1. List of specifications
9
Product Specifications
9-1. List of specifications
Detection principle Galvanic cell type
(OS)
Gas to be detected Oxygen (O2) Combustible gas (HC or CH4) *1 Detection range <Service range> Display resolution 0.1 vol% 0.5%LEL (to 100%LEL)/0.5vol% (to 100 vol%) Accuracy of the reading (under an identical condition) Response time (under an identical condition)
Concentration display Detection method Pump suction type Suction flow rate 0.75 L/min or more (Open flow rate) Displays Battery level icon, pilot indicator, and pump operation status indicator Buzzer sound volume Fault alarm/self diagnosis Fault alarm display Lamp blinking, intermittent buzzer sounding, and detail display Fault alarm pattern Self-latching Transmission specifications Functions LCD backlight, data logger, peak display, log data display, and pump stop Power supply Dedicated lithium ion battery unit [BUL-8000(R), BUL-8000(R1)]
Continuous operating time
Operating temperatures Operating humidities Structure Drip-proof and dust-proof performances (compliant to IP67 level) Explosion-proof structure
0 to 25 vol% <to 40 vol%>
Within ±0.7 vol% Within ±5%LEL (to 100%LEL)
90% response: within 20 seconds *2 90% response: within 2 minutes *3 LCD digital (seven-segment + Symbol + Bar meter)
95 dB (A) or higher (30 cm)
System abnormalities, sensor abnormalities, battery voltage drop, calibration failure, and low flow rate
IrDA (for data logger)
(Dedicated dry battery unit <AA alkaline dry batteries x 3> [BUD-8000(R)] can also be used.) BUL-8000(R), BUL-8000(R1): About 15 hours (25°C, no alarm, no lighting, and battery fully charged) BUD-8000(R): About 10 hours (25
-20 to +50°C
Below 95% RH (Non-condensing)
Intrinsically safe explosion-proof structure
Non-dispersive infrared type (RI)
0 to 100%LEL/to 100 vol%
Within ±5vol% or ±10% of the reading (to 100 vol%)
90% response: within 30 seconds *2
90% response: within 2 minutes *3
°C, no alarm, and no lighting)
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- 47 - RX-8000
9 Product Specifications 9-2. List of accessories
Explosion-proof class Explosion-proof certification number External dimensions Weight About 1.1 kg (when BUL-8000(R), BUL-8000(R1) is used) or about 1.0 kg (when
*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) *4 In order to meet requirement about explosion-proof, use dedicated dry cell battery when using
BUD-8000.
EXiaIICT4X(TIIS) / II1GExiaIICT4Ga(ATEX/IECEx<DEKRA>)
No.TC20782 (TIIS) / DEKRA13ATEX0228(ATEX)/IECExDEK13.0091(IECEx)
Approx. 154 (W) x 81 (H) x 127 (D) mm (projection portions excluded)
BUD-8000(R) is used)
9-2. List of accessories
Lithium ion battery unit (BUL-8000(R), BUL-8000(R1)): 1 (Attached to the main unit) AC powered charger: 1 Gas sampling probe and gas sampling hose: 1
Standard accessories
Optional accessories
WARNING
Please be sure to connect filter tube (CF-8385), when you use Gas sampling hose 30m with plummet. It not, when in sucking water, water might go inside RX-8000 mainbody and cause the system trouble.
Filter tube: 1 Relay tube: 1 Shoulder strap: 1 Filter tube fixing belt: 1 Operating manual Product warranty
Dry battery unit (BUD-8000(R)) AA size alkaline battery Waist strap Waist strap fixing tool 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 filter Relay tube Filters for CF-8385 (10pcs / 1set) Set of gas sampling bags (for %LEL/vol%) Span cans (supplying only for Japan Domestic ) Demand flow valve Replacement plug for AC adaptor (Europe round-type / UK-type / Australian-type) Data logger management program LCD protection film
non-compliant Rohs )
RX-8000 - 48 -
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10 Definition of Terms 9-2. List of accessories
10
Definition of Terms
vol% Gas concentration indicated in the unit of one-hundredth of the volume LEL The acronym of Lower Explosion Limit.
LEL refers to the lowest concentration of a combustible gas in air capable of causing explosion when ignited.
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