Riken Keiki RX-515 User manual

PT0E-1015
Portable Combination Gas Detector
RX-515
Operating Manual
MARINE USE

1
In the beginning
It is of our great pleasure to purchase Riken portable combination gas detector model
RX-515 this time. This instrument is an explosion-proof type portable gas detector which
is designed to measure the presence of the following gas shown below.
Methane(CH4) :0-100.0%LEL/5~100.0vol%
Oxygen(O2) :0~25.0% vol%
Carbon monoxide(CO) :0-1000ppm
Carbon dioxide(CO2) :0-20.0vol%
This instruction manual is a guide book for operation to use and operate model RX-515.
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-515 is approved by certificate number:
Baseefa 06ATEX0205
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.
InATEX Specifications

2
C O N T E N T S
１．Caution in operation ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ３
２．Name of each part・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ４
３．Operation・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ７
３－１．Check item before operation・・・・・・・・・・・・・・・・・・・・・ ７
３－２．Preparation・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ７
３－３．Start-up and end-up・・・・・・・・・・・・・・・・・・・・・・・・・・ ８
３－４．Flow monitor check・・・・・・・・・・・・・・・・・・・・・・・・・・ ９
３－５．Zero point adjustment・・・・・・・・・・・・・・・・・・・・・・・・・ ９
３－６．Measurement・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １３
３－７．Peak value・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １４
３－８．Power pump ON/OFF・・・・・・・・・・・・・・・・・・・・・・・・・・・ １４
３－９．Operation finished・・・・・・・・・・・・・・・・・・・・・・・・・・ １５
４．Alarm・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・１６
４－１．Alarm display・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １６
４－２．Alarm buzzer & lamp・・・・・・・・・・・・・・・・・・・・・・・・・・１６
４－３．Trouble display・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １７
５．Each function・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １９
５－１．Setting mode・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １９
５－１－１．Alarm setting・・・・・・・・・・・・・・・・・・・・・・・・・・ ２０
５－１－２．Date/time setting・・・・・・・・・・・・・・・・・・・・・・・・２１
５－２．LCD back light・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ２１
５－３．Data logger・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ２２
６．Maintenance check・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ２３
６－１．Battery replacement・・・・・・・・・・・・・・・・・・・・・・・・・・２３
６－２．Gas calibration (Span adjustment)・・・・・・・・・・・・・・・・・・・２４
６－３．Filter replacement・・・・・・・・・・・・・・・・・・・・・・・・・・２６
６－４．Sensor replacement・・・・・・・・・・・・・・・・・・・・・・・・・・ ２６
６－５．Daily check and regular check・・・・・・・・・・・・・・・・・・・・・２６
６－６．The replacement of parts・・・・・・・・・・・・・・・・・・・・・・・２７
６－７．Storage or treatment not to use for a long period)・・・・・・・・・・２８
７．Scrap of products・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・２８
８．Trouble shooting・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・２９
９．Definition of words・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・３０
１０．Specifications・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・３１
１１．Detection principle・・・・・・・・・・・・・・・・・・・・・・・・・・・・・３２
１１－１．NDIR method (Non-Dispersive Infrared)・・・・・・・・・・・・・・・・・３２
１１－２．GALVANIC CELL method・・・・・・・・・・・・・・・・・・・・・・・・・３２
１１－３．ELECTRO-CHEMICAL CELL method・・・・・・・・・・・・・・・・・・・・・３２

3
１．Caution in operation (For your safety)
To maintain the function for safety, follow the following instruction.
Warning
・Do not modify nor change the circuit and structure etc. When modify or change, it could
not maintain the function.
・This is explosion-proof product. Battery has to be replaced in non-hazardous zone. The
battery replacement in hazardous zone shall be out of the scope for explosion-proof
product.
・This is explosion proof. Be sure to operate with carrying case on.
・Do not measure in the environment of oxidant gas presence. When measure, it may shorten
the sensor life.
・When measure under organic solvent gas presence, do it in short time and make sensor
cleaning by sucking fresh air after measurement.
Caution
・Do not drop or damage it. This is a fire instrument. When strong shock is given, the
function may be the case not to maintain. Especially, when power is on, the shock from
outside is easy to receive. So, the caution at this point is needed.
・Keep it from the direct splash of water. As this is not of drip-proof, it may cause
the trouble by splash of water.
・Do not give the electric noise such as by walkie-talkie during operation. When receive
the electric noise, it may cause the trouble of reading and instrument.
・When the atmospheric pressure and temperature are changed, it may affect the gas reading.
・When it is condensed, the normal operation is impossible.
・Be sure to mount the internal filter and filter tube.

4
２．Name of each part
①POWER／ENTER SW
This is used for power ON/OFF and entering the figure.
②PUMP／－ SW
This is used when make the pump ON/OFF and deverse the figure.
③ZERO／＋SW
This is used when make zero adjustment and increase the figure.
④PEAK SW
This is used when to let the peak displayed.
⑤MODE／ESC SW
This is used when enter the set mode or cancel the input.
⑥ALARM LAMP
When trouble alarm triggers, this shall blink and light out.
⑦LCD with Back-light
This shows the gas reading.
①
②
③
④
⑤
⑥
⑦
GAS OUT
GAS IN
＊Caution
For CH4, when it goes over 100%LEL, it shall be changed to vol% automatically.
Methane「CH4」
Carbon monoxide「CO」
Oxygen「OXY」
Carbon dioxide「CO2」
Battery condition display

5
【Standard accessories】
①Carrying case with shoulder strap ②Filter tube with flow monitor and junction tube
③Gas sampling probe ④Gas sampling hose
⑤CO2 scrubber ⑥Alkaline

6
【Optional accessories】
①Gas sampling hose 30m with plummet ②Gas sampling hose 30m with float type sampling head
③Gas sampling bag 1L for LEL and VOL and calibration gas cylinder
⑤Absorbent cotton ⑥Water proof filter for filter tube (10pcs.)
⑦Steel storage box
⑧Data logging software ⑨Communication cable

7
３．Operation
３－１．Check item before operation
RX-515 instrument：
・Check that there is no damage for display unit etc.
Filter tube with flow monitor：
・Check the dirt of inside cotton filter. When it gets dirt, replace the cotton filter with
new one.
・When water drops remain, wipe it out and change it with new one.
・Check that these is no crack or damage.
・Check that these is no loose mount on the nipple.
Gas sampling hose：
・Check that there is no crack, creek or twist on the instrument.
３－２．Preparation
（1）Dry batteries are put into instrument.
（2）Put carrying case on to instrument.
（3）Connect the ①instrument(Gas inlet)＋②Filter tube with flow monitor＋③Sampling hose
in turn.
For gas sampling, 3 kinds tip formation are available and change it according to he measuring
environment.
Standard: Sampling hose and gas sampling probe
Optional: Sampling hose (30m)
Floating gas sampling head (30m)
・Connection with sampling hose
Take Curling part by fingers and pull ①arrow mark to ”→”. Put , it to the arrow mark
②←direction. Release the finger from the carling part. Further press and sound “tick,”
and locked.
Curling part
①
②
③
①
②

8
３－３．Start-up and end-up
When press power switch for 3 sec, the power gets on and this shall start up through the voltage
check, filter connection check and sensor connection check.
Press power switch for 3 sec
PROBE OK？
SENSOR CHECK
SENSOR OK
WARM UP 30
Accessory connection check
（Display word atternately）
FILTER OK？
【Sensor normal】
Warm up
Detection mode
ENTER key
FAIL SENSOR
STAND BY
Detection ready
Power off
Press POWER SW for 3 sec
GOOD －BYE
PREPARATION
Date/time display
WARM UP 30
STAND BY
Trouble sensor shall
show “……”.
・Press ENTER key
【Sensor trouble】
Stand-by

9
３－４．Flow monitor check
When the power gets ON, the pump shall start operation check that suction works properly by
filter tube with flow monitor.
At normal sucking（Can see float）
Not sucking（Can not see float）
３－５．Zero point calibration
Zero point calibration for this instrument shall be done for CH4(Methane), O2(Oxygen),
CO(Carbon monoxide) and that of CO2 carbon dioxide by separating them. When calibrate zero
point of CO2, it is required to remove CO2 in air by CO2 removal filter.
Float
Caution
When make zero adjustment, proceed to do it after having fresh air sucked into instrument
for over 1 min. But it is impossible to make correct zero adjustment if gas containing air
is put through instrument. 300-500ppm CO2 is remaining in air. If CO2 in air is directly
sucked into instrument for zero adjustment of CO2, it is impossible to make zero adjustment.
Through CO2 scrubber to the instrument, have air sucked into the instrument for over 1min.
Then, make zero adjustment.

10
＜FLOW CHART OF ZERO POINT ADJ＞
Display
HOLD KEY
・Press ZERO key for 3 sec.
ZERO key
Mount CO2 scrubber
FRESH AIR？
ENTER key
ESC key
Move to zero adj
for CO2 adj ESC
key
ADJ ZERO
【Zero set OK】
ZERO SET OK
FAIL ZERO
【ZERO adj fails】
S C R U B B E R？
ENTER key
ADJ ZERO
Go back to the operation
display by ESC key.
ESC key
《ZERO sets OK》
ZERO SET OK
Press for 5 sec and move to
zero adj of CO2
・When press ENTER key, CH4, O2, CO zero cal
starts
・Calibration
Gas display
All are OK
CH4fails, CO2 fails
Shows 5 sec and return back to gas
density screen
＊Note
To cancel previous operation, press ESC key.
But can not cancel after press ENTER key.
《ZERO fails》
・When press ENTER key, zero adj of
CO2 starts
FAIL ZERO

11
《Caution at use of SCRUBBER (CO removed filter)》
・Mount CO2 scrubber to the sampling side of filter tube with flow monitor.
・When operate, put erect the CO2 scrubber. When suck the sample gas horizontally, CO2 in
air may not be sucked.
・Available frequency for 1 pce shall be different by CO2 density. Then it will be different
by the airtight of CO2 scrubber, storage temp and humidity.
・The number in the list for one time per minute will be a hint of it but when CO2 in air
can not be specified, use it with a surplus.
CO2 in environment
Available frequency from view of stage
500ppm
About 1000 times
1000ppm
About 500 times
2000ppm
About 200 times
4000ppm
About 100 times
×Error
CO2 may not be sucked because air may pass in the oblique lines.
○Correct
CO2 scrubber
Filter tube with flow monitor

12
・Do not let high density CO2 sucked into instrument.
・Do not breathe in from air during zero calibration.
・After use of CO2 scrubber, shut off the ventilation from atmosphere. When the absorbent
agent is mixed with air, the absorption capability will be dropped by CO2 in air.
・Keep the CO2 scrubber from the sun light and store in dry place.
CO2 scrubber monitoring
CO2 scrubber (filter)
Mount it by putting the green arrow
mark to the filter side.
Filter side

13
３－６．Measurement
Approach the sampling hose to the sampling site for measurement and leave sampling gas
sucked.
・Take care that any twist on the sampling hose can not be made.
・Stop sampling hose at the point of measurement.
・From the hose length consider the delay time and read out the reading after the reading
gets stable.
Danger
・Oxygen depletion air etc may be exhausted from gas outlet. Do not breathe in there
absolutely.
・High density gas over (LEL) may be exhausted. Do not approach fire there absolutely.
Caution
・When suck air containing gas, do it after removing water vapours.
・When suck high temp gas, do it after being used to be ambient temp.
・Do not have water and oil sucked wrongly, the internal pump and sensor may be troubled.
・When measure, check the roaring sound of pump and flow monitor.
It is impossible to measure at pump work stop.
・Do not block the pump outlet, the reading shall show a little higher.
・When measure oxygen in inert gas for a long time, be sure to measure lower than 15% CO2
by all means. When exeed higher density than 15%, shorten the time for this measurement
as life of oxygen sensor may be shortend.
Warning
・In the place where environment temp is remarkably changed, there may be the case that
accurate oxygen measurement is impossible by temperature change. Wait until the
instrument may be used to the ambient temp (About 10 min) and start measurement after
having made zero calibration again.
・Do not use for after purpose then the measurement of combustible gas, vapor and toxic
gas mixchares.
＊Note
When measure the high density gas than LEL, the hung-up phenomenon.
①When measure CH4 by vol%, do measure it as it is.
②When make zero adjustment, remove the sampling base and supply fresh air sucked into
instrument.
③When measure by %LEL, make air cleaning of sampling hose and start to measure after
reading goes down to zero.

14
３－７．Peak value
When press PEAK key during operation, the peak valve from power on to the current point (CH4,
CO, CO2 = MAX, O2=MIN) shall be shown.
When hold and press ESC key for 3 sec during the peak value display, the peak value shall
be cleared.
３－８．Power pump ON/OFF
When move the sampling point and stop to operate temporarily, the pump only stops operation.
When stop the pump operation, the power consumption shall be reduced by about 40%. Then
the other than pump is on active and once the pump re-starts up, this shall start operation
immediately.
P E A K
ESC key
PEAK valve display
Display
PEAK key
Display
P E A K
PEAK value display
＊Note
・When do not operate for the time being, make off the power. Other than pump is active
and if it is left alone, the battery is consumed up.

15
３－９．Operation finished
（1）Treatment after operation
Wind up sampling bag roundly so treat it can not be twisted.
Supply fresh air in the condition of sampling hose connected and make air-cleaning until
the reading gets to zero nearly.
When use the floating gas sampling head or 30m sampling hose (30m: optical acc.), be sure
to make air-cleaning for 5 minutes before use.
（2）Power OFF
When hold and press power SW for about 5 sec, the buzzer sounds 8 times and the power will
be off.
HOLD KEY
PUMP OFF
HOLD KEY
PUMP ON
・Press pump key for 3 sec.
・Pump work will be off.
・Press pump key for 3 sec.
Operation display
PUMP key
PUMP key
・Pump work will be on.
Hold and press for 5 sec and back
to the operation display.
Caution
Never fail to make air cleaning of sampling hose.
When the vapors, water drop and substance remain, there will be the possibility of
remaining material at start-up. This will be the cause for trouble.

16
４．Alarm
４－１．Alarm display
①At 1st alarm, the figure will blink and “Warring”will blink.
②At 2nd alarm, the figure will blink and “Alarm”will blink.
③At over alarm, the figure will blink and “Over”will blink.
※Non latched mode
４－２．Alarm buzzer & lamp
WARNINNG
（1st alarm）
Lamp
ALARM，OVER
（2nd, Over alarm）
Lamp
【Intermittent tone】
【LED blinking】
【Intermittent tone】
【LED blinking】
Alarm≧1st alarm set（CH4、CO、CO2）
Alarm≦1st alarm set（O2）
【WARNING display, Intermittent LED, Blink】
Alarm≧2nd alarm set
【Alarm display, Intermittent LED, Blink】
Alarm≧F.S.
【OVER display, Intermittent LED, Blink】
《1st alarm》
《2nd alarm》
《Over alarm》
A L A R M
W A R N I N G
O V E R

17
４－３．Trouble display
（1）Cow flow
・When low flow trouble triggers, “COW FLOW”is displayed and pump stops working.
・Buzzer sounds continuously.
・After checking the cause, reset low flow alarm by “ESC”key. The pump will re-start
and return to the operation display.
（2）Low battery
・When the power of battery is dropped, “REPLACE BATT.”Will be displayed.
・Buzzer will sound continuously.
・After displaying “REPLACE BATT.”, it does not accept other tlan “Power OFF”.
・After power off, replace the battery with new one.（See it for 6-1. Battery replacement）.
REPLACE BATT.
Low battery
Power OFF operation available only by POWER key.
LOW FLOW
Pump OFF
ESC
Pump ON
Caution
When low float trouble took place, be sure to check the cause to make low flow.
Especially when suck water, it will be the cause for trouble. After checking the condition
of probe filter tube, re-start the pump by ESC key. (When press ESC and re-start in the
water remaining condition, there will be the case of water instrusion into instrument.
For low flow trouble, it shall be cautioned that no error display will be the setting mode.

18
（3）System trouble
・When the program is troubled, “SYSTEM FAIL”will be shown.
・Buzzer will sound continuously.
・After “SYSTEM FAIL”is shown, it does not accept other than “Power off”.
（4）Sensor trouble
・When sensor is troubled, “FAIL SENSOR”is displayed and the measuring gas for the troubled
will be shown.
（Sensor for trouble detected at start-up time shall be shown.）
・Buzzer will sound continuously.
・After showing “FAIL SENSOR”, it does not accept other than “Power off”.
Power off available only by power key
F A I L S E N S O R
S A V E
Power off available only by power key
SYSTEM FAIL
＊Caution
When try to measure offer gas than the troubled, make power off once and re-start it.
After checking the start-up and error, move to the other sensor than the troubled.

19
５．Each function
５－１．Setting mode
Operation display
HOLD KEY
W A R N I N G
A L A R M
D A T E T I M E
①1st alarm display
②2nd alarm
日時表示
Data logging
・Press MODE key for 3 sec.
MODE key
＋
－
・When hold and press PEAK key for 3
sec at alarm display (①,②), alarm
point will be changed to alarm set
display.→To alarm setting.
PEAK key
MODE key
To alarm setting
－
－
＋
MODE key
PEAK key
Alarm setting
＋
－
PEAK key
Date setting
MODE key
MODE key
・When hold and press PEAK key for 3
sec, it will be changed to date
display.
L O G R E M A I N
In case of over light
Displayed in the following order
①1st alarm
②2nd alarm
③Date display
④Data logger remaining
・『＋』or『－』key: When press it, the
display will be changed.
＋
LOG OV - WRITE