Riken Keiki RX-415 User manual

PTOE‑0281
Released: SEP/15/2009
RIKEN PORTABLE HC/O2 DETECTOR
MODEL ＲＸ−４１５
OPERATION MANUAL
(PT0-028)
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Precautioninoperation
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  
・Afterreadingthismanualwell,starttooperatethisinstrument. 
・Keep this manual where to carry out easily 
・When take out this manual by use ofconstruction work, be sure to put it
where it was. 
・Do not use this instrument for no other than given purpose. 
・When operate this instrument without using this manual or repair it by use of
no other parts than the genuine one, the safety and quality of products could
not be guaranteed. When any accident should take place by those irregular

method, we cannot assume the responsibility for it. 
2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan
Phone : [phone]
Fax : [phone]
E-mail : [e-mail]
Web site : http://www.rikenkeiki.co.jp/english/

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1
In the beginning
It is of our great pleasure to purchase Riken portable HC/O2 gas indicator model RX-415 this
time. This instrument is an explosion-proof type portable gas indicator which is designed to
measure the presence of crude vapors in an inert gas or in air such as HC gas, vapors and
methane gas and O2.
This instruction manual is a guide book for operation of Riken portable HC/O2 gas indicator
model RX-415. It is kindly requested to read and understand this content by experienced users
as well as beginners. The following headline shall be shown to carry out the safety and effective
work in this instruction manual.

Model RX-415 is approved by certificate number:
Baseefa 05ATEX0101
Danger
This means that it gives the serious harm to the human life, body or material directly such as
touching high voltage.
Warning
This means that it gives the serious harm to the human body or material if do not perform the
operation according to the instruction manual.
Caution
This means that it gives the slight harm to the human body or material if do not perform the
operation according to the instruction manual.
＊Note
This means the advice in the operation.
Model RX-415 consists of two type according to the kind of gases below ;
For HC gas use : Model RX-415 (TYPE HC)
HC : 0-100%LEL/0-100vol%
O2 : 0-25vol%
For CH4 gas use : Model RX-415 (TYPE CH4)
CH4 : 0-100%LEL/0-100vol%
O2 : 0-25vol%

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2
Contents
 Page
１．Caution in operation (for your safety)・・・・ 3
２．Name of each part・・・・・・・・・・・・・・・・・・ 4
３．Operation
３−１．Check item before operation・・・・・・・・・・・・・・・ 6
３−２．Preparation・・・・・・・・・・・・・・・・・・・・・・ 6
３−３．Start-up procedure・・・・・・・・・・・・・・・・・・・ 8
３−４．Check of the flowmonitor・・・・・・・・・・・・・・・・ 9
３−５．Zero adjustment・・・・・・・・・・・・・・・・・・・・ 9
３−６．Measurement・・・・・・・・・・・・・・・・・・・・・ 10
３−７．Stop of pump operation・・・・・・・・・・・・・・・・・ 12
３−８．Measurement completion・・・・・・・・・・・・・・・・ 13
４．Alarm function
４−１．Kind of alarm and alarm function・・・・・・・・・・・・ 14
４−２．Countermeasure at alarm ・・・・・・・・・・・・・・・ 15
５．Maintenance check
５−１．Battery replacement・・・・・・・・・・・・・・・・・・ 16
５−２．Gas calibration・・・・・・・・・・・・・・・・・・・・・ 17
５−３．Filter replacement・・・・・・・・・・・・・・・・・・・ 22
５−４．O2 sensor replacement・・・・・・・・・・・・・・・・・ 23
５−５．Daily check and regular maintenance check ・・・・・・・ 24
５−６．Replacement of parts・・・・・・・・・・・・・・・・・・ 24
５−７．Storage and disposal
when the instrument is not used for a long time・・・・・・24
６．Scrap of instrument・・・・・・・・・・・・・・・・・ 25
７．Troubleshooting・・・・・・・・・・・・・・・・・・・ 26
８．Definition of words・・・・・・・・・・・・・・・・・・ 27
９．Specifications
９−１．Specifications・・・・・・・・・・・・・・・・・・・・・・28
９−２．Accessories (Common for HC and CH4)・・・・・・・・・・30
１０．Detection principle
１０−１．NDIR method (Non-Dispersive Infrared)・・・・・・・・ 31
１０−２．GALVANIC CELL method・・・・・・・・・・・・・・・31

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3
1.Cautioninoperation(foryoursafety)
Keep the following items below to maintain the function of instrument and for safety.
Warning
・Do not modify or alter the circuit or structure etc.
After modifying and altering the instrument, the function can not be maintained
any longer.
・As this is explosion-proof typeinstrument, make the battery replacement at
non-hazardous-zone. The replacement at hazardous zone will be beyond the
scope of explosion-proof concept.
・As this is explosion-proof type instrument, besure to operate with carrying case on.
Warning
・Sensor life can be excessively reduced under the condition where acid gas and
solvent gas are existing. In this case, make measurement as quickly as possible.
After measurement, make sensor cleaning by introducing fresh air.
Caution
・Do not fall or crush it.
As this is a fine instrument, the function may not be maintained if high impulse or
shock is given.
・Do not splash water directly.
As this is not drip-proof structure, it will be a cause for trouble if water is splashed
directly.
・Do not give the electrical noise during operation by strong walkie-talkie wave etc.
When give the electrical noise to the instrument, it will be a cause to damage the
instrument.
・When the temperature in air is changed drastically, it may affect the reading of
the instrument.
・When it is in dew or condensed, the normal measurement can not be carried out.
・For internal filter and filter tube, be sureto operate it with them on by all means.
＊Note
・When measure the gas contains water, suck it afterremoving water.
・When measure high temperature gas, make measurement after the instrument
accustom itself to its temperature.

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4
2.Nameof each part
①Power/Enter switch
This is used for the confirmation of power ON, OFF/input.
②PUMP/(+) switch
This is used for pump Switch ON/OFF and to increase the input value.
③ZERO/(-) switch
This is used for zero adjustment and decrease the input value.
④PEAK switch
This is used when desired to show the peak value.
⑤BATT/ESC switch
This is used when desired to show the battery voltage and cancel the input.
⑥Gas outlet
This is the outlet to exhaust sample gas out.
⑦Calibration gas name plate
This shows the calibration gas name.
⑧Display unit (LCD display with back light)
This displays gas concentration.
⑨Alarm lamp
This flickers and lights on at trouble alarm time.
⑩Photo sensor window
This is for automatic back-lights of display unit by detecting that it gets dark around.
⑪Gas inlet
This is a measuring gas inlet.
⑤④③②⑨ ⑩①
 ⑦⑧
⑥ ⑪

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5

⑬



⑫Carrying case
⑬Junction tube (20cm)
⑭Gas sampling probe + Sampling tube (1m)
⑮Filter tube with the flowmonitor
⑭
⑫
⑬
⑮

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6
3.Operation
３−１．Check item before operation
Instrument :
・Check that there is no damage on the display unit.
Filter tube with the flowmonitor :
・Check the dirt of cotton and when it gets dirty, replace the cotton with new one. (See 5-3)
・
When the water drops are deposited, drain it out.
・
Check that there is no crack or damage.
・
Check that there is no looseness on the nipple mounting.
Gas sampling tube :
・Check that there is no break or twist of it.
３−2．Preparation
(1) Mount the battery into the instrument. (See 5-1)
(2) Put the instrument into the carrying case.
(3) Connect the junction tube, the filter tube with the flowmonitor and the gas sampling tube with
the gas inlet of the instrument in turn.
As there are several types of head tubes for the instrument, use them according to each
environment.
Standard specification Spiral sampling tube 1m + Gas sampling tube
Optional specification Gas sampling tube 30m Black (with stick probe or float probe)
Gas sampling tube 20m Black (with stick probe or float probe)
Gas sampling tube 10m Black (with stick probe or float probe)
Gas sampling tube 29m Orange + Junction tube 1m Orange
(with stick probe or float probe)
・Connection between gas sampling junction tube and model RX-415.
By holding knurling part with fingers, pull it to the arrow mark. ⇒
Plug in to the arrow mark ←with its condition. Release the fingers holding the knurling part and
press in. Then, locked after ticking sound.
Knurling part Junction tube
Gas inlet
Junction tube
Filter tube with the flowmonitor
Spiral tube
Gas sampling tube

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7
・Connection between gas sampling junction tube and sampling tube (Optional specification).
By holding the socket of gas sampling junction tube and the plug of sampling tube by fingers
and plug in to the arrow mark until it gets a ticking sound.
Warning
・As this is used in dangerous zone, be sure to use it with carrying case.
Caution
・Be sure to plug in the gas sampling tube and junction tube.
If not surely connected, the accurate measurement cannot be carried out.
・Be sure to mount the filter tube with the flowmonitor.
If measure without filter, it will be a cause of trouble by sucking dust, water
and oil etc.
Sampling tube
Plug Socket
Gas sampling relay tube

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8
３−３．Start-up procedure
Hold pressing power switch for 5 seconds and the power will turn on. Via battery check,
filter probe connection check and sensor connection check, the gas detection will start.
The sequence performance until the gas detection starts is as follows :
Hold pressing power switch for 5 seconds
↓
 １００．０ｖｏｌ％ ２５．０％ At pump connection fail.
 Approx. 5 sec. ↓①
ＢＡＴＴ．：Ｅ −−−｜−− Ｆ At battery power shortage.
Approx. 5 sec. ↓②
  ＰＲＥＰＡＲＡＴＩＯＮ
Approx. 5 sec. ↓
ＰＲＯＢＥ／ＦＩＬＴＥＲ ＯＫ？
After checking tube/filter, press ＥＮＴＥＲ .
↓
  ＳＥＮＳＯＲ ＣＨＥＣＫ At sensor connection fail.
Approx. 5 sec. ↓③
ＳＥＮＳＯＲ ＣＨＥＣＫ ＯＫ
Approx. 5 sec. ↓
ＷＡＲＭＩＮＧ ＵＰ ３０ｓｅｃ
30 sec. ↓
 Countdown
  ＳＴＡＮＤ ＢＹ ＯＫ
Approx. 5 sec. ↓
   ０．０％ＬＥＬ ２０．９％
Detection starts.
①Display, performance at pump connection failure. (See 3.)
ＦＡＩＬＰＵＭＰ （Lamp:Light-on, Buzzer :Continuous）
②Display, performance at power voltage shortage. (See 3. and 5-1)
ＲＥＰＬＡＣＥ ＢＡＴＴＥＲＹ （Lamp: Light-on, Buzzer: Continuous）
③Display, performance at sensor connection failure. (See 3.)
In case of HC sensor connection failure
ＦＡＩＬ ＳＥＮＳＯＲ  ＨＣ （Lamp:Light-on, Buzzer:Continuous）
In case of O2 sensor connection failure
ＦＡＩＬ ＳＥＮＳＯＲ  Ｏ２ （Lamp:Light-on, Buzzer:Continuous）
In case of HC sensor/O2 sensor connection failure
  ＦＡＩＬ  ＳＥＮＳＯＲ  （Lamp :Light-on, Buzzer :Continuous）
＊Note
At power on, check that
the buzzer and pump
sound.

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9
３−４．Check of the flowmonitor
When turn on power, the pump starts working. Check that it works properly by the flowmonitor
(float) of filter tube with the flowmonitor.
When sucking properly (Can see the float)
Not sucking properly (Cannot see the float)
３−５．Zero adjustment
Make zero adjustment by removing the gas sampling tube.After the detection starts, see the
flowmonitor and check that the air is sucked properly. Then, check that the reading gets stable
and make zero adjustment by sucking the fresh air into instrument.
The operation procedure is shown below.
   ０．０％ＬＥＬ ２０．９％ （Gas display）
 ↓
 ＨＯＬＤ ＺＥＲＯ ＫＥＹ Holdpressing ＺＥＲＯ forapprox. 3sec.
 ↓
ＡＰＰＬＹ ＦＲＥＳＨ ＡＩＲ Afterchecking that fresh airis sucked intoinstrument
 ↓ and then, press ＥＮＴＥＲ switch.
 ＡＤＪＵＳＴＩＮＧ ＺＥＲＯ
Zero calibration failure
Approx. 5 sec. ↓①
ＺＥＲＯＳＥＴＯＫ
Approx. 5 sec. ↓
   ０．０％ＬＥＬ ２０．９％ （Gas display）
Float
Float