Riken Keiki RI-85 User manual

PT0E-0136
Portable Infrared CO2Gas Monitor
RI-85
Operating Manual

1
Thank you very much for your purchasing the portable infrared CO2 gas monitor, Model RI-85.
This instrument is a portable gas monitor to monitor CO2 gas in air.
This is instruction manual is the guidebook for the Model RI-85 to operate. Not only a beginner
user, but also experienced user has to read this instruction manual and understand it before
the actual use.
Following marks appear on this manual to perform safe and effective use:
DANGER This message indicates that improper handling may cause serious
damage on life, health or assets.
W
ARNING This message indicates that improper handling may cause serious
damage on health or assets.
CAUTION This message indicates that improper handling may cause minor
damage on health or assets.
NOTE This message indicates advice on handling.
At first

2
Page
１．Name of each parts ‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 3 ～ 4
２．How to use
２－１．Preparation ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 5 ～ 6
２－２．How to start ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 6 ～ 7
２－３．How to detect ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 7 ～ 12
２－４．How to finish ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 12
３．Alarm/Self-diagnosis
３－１．Kinds of alarm and pattern ‥‥‥‥‥‥‥‥‥‥‥ 13
３－２．Treatment for alarm/Self-diagnosis ‥‥‥‥‥‥‥ 14
４．Maintenance
４－１．Replacing battery ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 15
４－２．Zero calibration ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 15 ～ 18
４－３．Span calibration ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 19 ～ 20
４－４．Replacing absorbent cotton ‥‥‥‥‥‥‥‥‥‥‥ 21
４－５．Daily maintenance/Regular maintenance ‥‥‥‥‥‥ 22
４－６．Replacing parts ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 22
４－７．Storage/Treatment for not being used long time ‥ 22
５．Disposing the instrument ‥‥‥‥‥‥‥‥‥‥ 23
６．Trouble shooting ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 24
７．Precautions ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 25
８．Specifications
８－１．Specifications ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 26
８－２．Accessories ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 27
９．Detection principle ‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 28
Index

3
1. Name of each parts
① Gas outlet
② Gas inlet
③ Alarm lamp
④ Gas name
plate
⑤ Window of photo
sensor
⑥ Display
⑦ ＯＮ／ＯＦＦ ／ＥＮＴＥＲ switch
⑧ ＺＥＲＯ ／＋ switch
⑨ ＡＶＧ．ＳＴ ／－ switch
⑩ ＡＶ／ＰＫ switch
⑪ ＢＡＴ／ＡＬ ／ＥＳＣ
switch
⑫ Battery
cover ⑬ External output jack
⑭ Carrying case ⑮ Gas sampling hose
(spiral)
⑯ ＰＲＯＢＥ Gas sampling probe

4
① Gas outlet
② Gas inlet
③ Alarm lamp
Lamp ON at alarm.
④ Gas name plate
Indicates measuring gas, CO2.
⑤ Window of light receive source
Automatically light ON of instrument display by detecting darkness around.
⑥ Display (LCD display with light)
Indicates gas concentration etc.
⑦ ＯＮ／ＯＦＦ ／ＥＮＴＥＲ switch
Switch for power ＯＮ／ＯＦＦ and to enter the input content.
⑧ ＺＥＲＯ ／＋ switch
Switch for zero adjustment and to increase input value.
⑨ ＡＶＧ．ＳＴ ／－ switch
To start for measuring average value and to decrease input value.
⑩ ＡＶ／ＰＫ switch
To indicate average value and peak value.
⑪ ＢＡＴ／ＡＬ ／ＥＳＣ switch
To indicate battery voltage value/alarm set value and to cancel inputted contents.
⑫ Battery cover
⑬ External output jack
⑭ Carrying case
⑮ Gas sampling hose (spiral) （１ｍ）
⑯ ＰＲＯＢＥ Gas sampling probe (with absorbent cotton)
⑰ Protective filter (Refer to 4-4.)

5
Check before use
Instrument itself：
・Make sure no defect on the LCD display.
Gas sampling probe (with absorbent cotton)：
・Make sure the absorbent cotton is clean. If not, replace it with new one. （Refer to
4-4.）
・In case of drawing water drop, dry it off.
・Make sure no defect on the gas sampling probe.
Gas sampling hose (spiral)：
・Make sure no leakage on the gas sampling hose (spiral).
・Make sure the connector fixed firmly.
２－１ Preparation
(1) Install dry batteries.（Refer to 4-1.）
(2) Put in the instrument to the carrying case.
(3) Connect gas sampling hose (spiral) and gas sampling probe to the instrument (gas
inlet).
Hold the knurling part of connector and pull it to the white arrow ( ) direction.
With holding, put it into the black arrow ( ) direction. Release the finger from
the knurling part, and put it in fully until sounding "click" and rocked the connector.
２．How to use
Knurling part Tube
Instrument

6
・ Connect gas sampling probe and gas sampling hose (spiral) to
the instrument (gas inlet) firmly.
Otherwise, correct measuring can not be performed.
・ Keep the gas sampling probe (with absorbent cotton) on the
instrument all the time during gas detection.
・ Without filter, the dust, water and oil are sucked in to the
instrument. These material might be a cause of breakdown.
２－２．How to start
By pressing ＯＮ／ＯＦＦ switch for 3 seconds, the power turns on and starts gas detection,
through following procedure, battery voltage check, tube/absorbent cotton check and
sensor connection check. The starting flow is as follows.
Press ＯＮ／ＯＦＦ switch for 3 seconds.
ＣＯ２ ０－１００００ ｐｐｍ （Indicate measuring gas and range.）
Approx. 5 sec. At pump connection failure.（P.7 ①）
ＢＡＴＴ．：Ｅ －－－｜－－ Ｆ （Indicate battery capacity sample.）
Approx. 5 sec. At battery voltage shortage.（P.7 ②）
ＰＲＥＰＡＲＡＴＩＯＮ （Prepare before detection.）
Approx. 5 sec.
ＰＲＯＢＥ／ＦＩＬＴＥＲ ＯＫ？ （・Connect gas sampling probe.）
Approx. 5 sec. If OK, press ENTER switch （・Replace absorbent cotton.）
ＳＥＮＳＯＲ ＣＨＥＣＫ （Self diagnosis sensor check.）
At sensor connection failure.（P.7 ③）
ＳＥＮＳＯＲ ＣＨＥＣＫ ＯＫ
Approx. 5 sec.
ＷＡＲＭＩＮＧ ＵＰ ３０ｓｅｃ （Warming up 30 sec.）
30 sec.
Caution
！
When power on, check the buzzer
and pump sound.
＊
Note

7
ＳＴＡＮＤ ＢＹ ＯＫ （Preparation is end.）
Approx 5 sec.
７００ ｐｐｍ （Detection starts.
<Gas concentration indicates>）
① Indication and action at pump connection failure.（Refer to 3-1.）
ＦＡＩＬ ＰＵＭＰ （Buzzer：Continuous）
② Indication and action at battery voltage shortage.（Refer to 4-1.）
ＲＥＰＬＡＣＥ ＢＡＴＴＥＲＹ （Buzzer：Continuous）
③ Indication and action at sensor connection failure.（Refer to 3-1.）
ＦＡＩＬ ＳＥＮＳＯＲ （Buzzer：Continuous）
２－３ How to detect
After detection starting, the display indicates detected current CO2 concentration value.
Though it indicates some hundreds ppm value, it is not trouble/breakdown, but the normal CO2
concentration in the atmosphere. Normal CO2 concentration is different depending upon the
condition. Followings is the example of CO2 concentration in the atmosphere.
CO2 concentration
Inside room 500 ～ 1,500ppm
(It may indicate over 2,000 ～ 5,000ppm near an oil stove etc.)
Outside room 300～500ppm
(It may indicate over 50,000ppm by auto emission.)
Human expiration Max. 5vol% (50,000ppm)

8
(1) Normal detection (moment value detection)
At the place where want to check the CO2 concentration, start measuring and read the
indication after over 20 seconds. In order to measure more accurately, read the
indication after over 30 seconds.
・Normal indication: ７００ ｐｐｍ
・Indication increments ０－２０００ｐｐｍ : １０ｐｐｍ
２０００－５０００ｐｐｍ : ２５ｐｐｍ
５０００－１００００ｐｐｍ : ５０ｐｐｍ
・Indication below "0":
０ ｐｐｍ ：Blinking "0".
・Indicate "OVER", in case of over １０,０５０ｐｐｍ.
: ＯＶＥＲ ｐｐｍ
Do not breath in the exhaust gas of the instrument at all, as the
exhaust gas may be oxygen deficiency or toxic gas.
In such case, exhaust the gas to the place where can be safe.
・ Do not let water or oil sucked into the instrument. If it should be
sucked, the pump or sensor shall be failed.
・ When measure, check the running sound of pump and the sucking
condition at gas inlet.
It cannot be measured at stop of pump operation.
・ Absorbent cotton filter must be put inside of gas sampling probe.
Otherwise, the pump power shall be down and the instrument shall
be breakdown.
・ Do not block the gas outlet because the display reading may drift.
Danger
！
Caution
！

9
(2) Average value measuring
Average value can be measured by pressing ＡＶＧ．ＳＴ switch while displaying gas
concentration.
・ Three kinds of measuring time are available, 1 minute ・ 3 minutes ・ 15 minutes .
・ The result of measured average value is memorized after power off.
・ Measuring time is a little bit different from the atmosphere temperature.
・ By starting measuring average value newly, the previous data is cleared, and new
measured average value is memorized. If cancel new average value measuring,
the previous data is kept.
・ In case of over 10,000ppm （Indicates "ＯＶＥＲ"）, the all data is measured
"10,050ppm".
① ７００ ｐｐｍ （Gas concentration indication.）
Press ＡＶＧ．ＳＴ switch.
② １ｍｉｎ：ＳＴＡＲＴ→ＥＮＴ （Blinking measuring time.）
By ＋ － switches, measuring time can be selected.
③ ３ｍｉｎ：ＳＴＡＲＴ→ＥＮＴ （Blinking measuring time.）
Press ＥＮＴＥＲ switch, start measuring average value.
④ ３ｍｉｎ： ８００ ｐｐｍ （Measuring average value.）
Indicate moment concentration value.
Time count down.
⑤ ５８ｓｅｃ： ８８０ ｐｐｍ （Measuring average value.）
Change over from "min" to "sec" when the rest time becomes within 1 minute.
⑥ ＡＶＧ．： ８５０ ｐｐｍ （Measuring average value end.）
Press ＥＳＣ switch, return to gas concentration indication. （to ①）
Press ＡＶ／ＰＫ switch, change over to peak value indication. （to (4)-③）
Press ＡＶＧ．ＳＴ switch, change over again to measuring average value. （to ②）

10
In order to cancel measuring average value, press ESC switch while ④，⑤.
④ ３ｍｉｎ： ８００ ｐｐｍ （Measuring average value.）
Press ＥＳＣ switch.
ＥＳＣＡＰＥ ？
Press ＥＳＣ switch, keep measuring average value. （to ⑤）
Press ＥＮＴＥＲ switch, cancel and return to the beginning (measuring mode). （to ①）
The previous data (peak value and average value) are kept.
(3) Measuring peak value
・ Peak value is memorized automatically from time to time, after power turning on and
starting measuring. Peak value can be shown by pressing ＡＶ／ＰＫ switch.
・ After measuring average value, the previous data of peak value is cleared.
(4) Showing peak value and average value
Peak value and average value can be shown in turn by pressing ＡＶ/ＰＫ switch while
measuring.
Return to measuring automatically in case of no operation of ＡＶ/ＰＫ switch for 20
seconds.
① ７８０ ｐｐｍ （Gas concentration indication.）
Press ＡＶ/ＰＫ switch.
② ＡＶＧ．： １０００ ｐｐｍ （Average value indication.）
Press ＡＶ/ＰＫ switch.
③ ＰＥＡＫ： １２００ ｐｐｍ （Peak value indication.）
Press ＡＶ/ＰＫ switch.

11
(5) Clearing average value and peak value
Peak value and average value are cleared by pressing ＥＳＣ． switch for 3 seconds.
７００ ｐｐｍ （Gas concentration indication.）
Press ＡＶ／ＰＫ switch.
ＡＶＧ．： ８００ ｐｐｍ （Average value indication.）
Press ＥＳＣ． switch for 3 seconds.
Press ＡＶ／ＰＫ switch.
ＡＶＧ．： ０ ｐｐｍ (Average value clear.)
Press ＡＶ／ＰＫ switch.
ＰＥＡＫ： １０００ ｐｐｍ （Peak value indication.）
Clearing peak value is as well.
Peak value is renewed from time to time once return to the measuring mode. And after the
measuring average value, the memorized data of peak value before is cleared.
(6) Showing battery voltage (sample) and alarm set value
Current battery voltage (sample) and alarm set value can be shown by pressing ＢＡＴ/ＡＬ
switch while measuring.
Return to measuring automatically, in case of no operation of ＢＡＴ/ＡＬ switch for 20
seconds.
① ７００ ｐｐｍ （Gas concentration indication.）
Press ＢＡＴ/ＡＬ switch.
② ＢＡＴＴ．：Ｅ －－－｜－－ Ｆ （Sample indication.）
Press ＢＡＴ/ＡＬ switch.
③ ＡＬＡＲＭ： １０００ ｐｐｍ （Alarm set value indication.）
Press ＢＡＴ/ＡＬ switch.

12
(7) Alarm set value selection
The figures of alarm set value start blinking by pressing ＥＮＴＥＲ switch for 5 seconds,
alarm set value can be selectable.
Available alarm set values are following 3 kinds. 1000ppm ・ 5000ppm ・ ＯＦＦ
① ７００ ｐｐｍ （Gas concentration indication.）
Press ＢＡＴ/ＡＬ switch.
② ＢＡＴＴ．：Ｅ －－－｜－－ Ｆ （Sample indication.）
Press ＢＡＴ/ＡＬ switch.
③ ＡＬＡＲＭ： １０００ ｐｐｍ （Alarm set value indication.）
Keep pressing ＥＮＴＥＲ switch.
④ ＨＯＬＤ ＥＮＴＥＲ ＫＥＹ
Press ＥＮＴＥＲ switch for 5 seconds.
⑤ ＡＬＡＲＭ： １０００ ｐｐｍ （Figures blinking.）
By ＋ － switches, alarm set value can be
selectable.
⑥ ＡＬＡＲＭ： ＯＦＦ （Figures blinking.）
Press ＥＮＴＥＲ switch, alarm set value selected newly.
Press ＥＳＣ switch, previous alarm set value is kept.
⑦ ＡＬＡＲＭ： ＯＦＦ （Alarm set value indication.）
Press ＢＡＴ／ＡＬ switch.
⑧ ７００ ｐｐｍ （Gas concentration indication.）
２－４ How to finish
How to turn off.
By pressing ＯＮ／ＯＦＦ switch for 5 seconds, the power turns off.
The buzzer alarms approx. 15 times while pressing ＯＮ／ＯＦＦ switch.

13
３－１ Kinds of alarm and pattern
The function of gas alarm and self-diagnosis are available to this model. Each alarm is
informed by lamp, buzzer and indication.
Kinds of alarm and pattern
Condition Lamp Buzzer Indication
W
h
e
n
p
o
w
e
r
o
n
Battery voltage shortage OFF Continuous "REPLACE BATTERY"
Sensor connection failure OFF Continuous " FAIL SENSOR "
Pump connection failure OFF Continuous " FAIL PUMP "
System error OFF No buzzer " SYSTEM ERROR "
D
u
r
i
n
g
m
e
a
s
u
r
i
n
g
Gas alarm ON Continuous Indicates current
concentration value
Battery voltage shortage pre-alarm OFF
Intermittent
(30 sec.
interval)
Blinking "B" on left side
of display.
Battery voltage shortage alarm OFF Continuous "REPLACE BATTERY"
Zero calibration failure OFF No buzzer " FAIL ZERO "
Span calibration failure OFF No buzzer " FAIL SAPN "
３．Alarm/Self-diagnosis

14
３－２ Treatment for alarm/Self-diagnosis
(1) Battery voltage shortage（“ＲＥＰＬＡＣＥ ＢＡＴＴＥＲＹ”）
Replace 4 pcs of batteries with new one according to “４－１．Replacing battery”.
(2) Sensor connection failure（“ＦＡＩＬ ＳＥＮＳＯＲ”）
In case of dropping, giving hard impact and long time usage, it might indicate this error
message.
(3) Zero calibration failure（“ＦＡＩＬ ＺＥＲＯ”）
In case of not drawing zero gas correctly and of sucking water etc., it might indicate
this error message. Correct zero calibration should be done.
(4) Span calibration failure（“ＦＡＩＬ ＳＰＡＮ”）
In case of not drawing calibration gas correctly and sucking water etc., it might indicate
this error message. Correct span calibration should be done.
(5) Pump connection failure（“ＦＡＩＬ ＰＵＭＰ”）
In case of dropping, giving hard impact and long time usage, it might indicate this error
message.
(6) System error （“ＳＹＳＴＥＭ ＥＲＲＯＲ”）
In case of affected heavy noise, it might indicate this error message. Power turns on
again. If indicating same error message again, please consult RIKEN KEIKI or our
representatives.

15
４－１ Replacing battery
Replace all 4 batteries with new one according to following procedure.
(1) Confirm the battery is run down.
Power off, in case of power on.
(2) Remove the instrument from carrying case.
(3) Slide the battery cover with pushing softly.
(4) Remove old batteries 4 pcs, and install new one taking care of direction.
・ Specified battery must be used.
・ It is easy to remove the battery from positive (+) side, install the
battery from negative (-) side.
(5) After replacing battery, be as before.
４－２ Zero calibration
In order to keep the quality of this instrument, zero calibration must be done before start
measuring.
"Absorption tube" is required for zero calibration. Following two methods are available
for zero calibration.
In order to make calibration more accurately, ② is better.
① Using absorption tube (with absorbent agent)
② Using zero gas with sampling bag
Zero gas and gas sampling bag are optional accessories.
４．Maintenance
＊
Note

16
(1) Prepare absorption tube (with absorbent agent) or zero gas and gas sampling bag for
zero calibration.
(2) Remove gas sampling probe, gas sampling hose (spiral), prepare absorption tube or gas
sampling bag to be able to connect to gas inlet.
(3) Power turns on, and make zero calibration.
Zero calibration procedure is as follows.
７８０ｐｐｍ （Gas concentration indication.）
ＨＯＬＤ ＺＥＲＯ ＫＥＹ Press ＺＥＲＯ switch for 3 seconds.
ＳＥＴ ＺＥＲＯ ＦＩＬＴＥＲ？ （Connect absorption tube.）
Connect absorption tube or gas sampling bag filled with zero gas to
gas inlet.
Connect to gas inlet correctly.
Press ＥＮＴＥＲ switch if OK.
ＳＥＴ ＺＥＲＯ ？ （Start zero calibration.）
Confirm absorption tube is connected firmly.
Press ＥＮＴＥＲ switch after over 1 minute.
Press ＥＳＣ． switch, when cancel.
ＳＥＴＴＩＮＧ ＺＥＲＯ （Zero calibrating.）
Approx 3 sec. （Zero calibration failure.）
ＺＥＲＯ ＳＥＴ ＯＫ （Zero calibration end.）
Approx 3 sec.
０ｐｐｍ （Gas density indication）
Indication and action at zero calibration failure. （Refer to 3-1.）
ＦＡＩＬ ＺＥＲＯ
（Return to measuring mode by ＥＳＣ．switch.）

17
If zero calibration is done with sucking CO2 gas in the atmosphere
directly, correct detection can not be performed. Normally, CO2
exists 300ppm～500ppm in the air. (Refer to 2-3.)
In case of using zero gas.
・ Gas sampling bag should be filled with zero gas.
・ Before filled with zero gas, gas sampling bag should be empty fully by
using sampling pump of this instrument etc.
In case of using absorption tube
・ Absorption tube should be filled with absorbent agent in advance.
・ When filling absorbent agent to the tube, fill up closely, and fix them by
absorbent cotton.
・ Remove the cap of absorption tube, when use.
・ Attach the cap with absorption tube after use, in order to cut off the
porous contact with atmosphere. The capacity of absorption goes
down due to absorbing CO2 gas in the atmosphere.
・ Store absorption tube in a dry room where direct sunshine does not
reach.
・ Absorption tube should be used vertically. If use it horizontally, CO2
in air may not be adsorbed.
Wrong This part, air pass through, CO2 can not be absorbed.
Correct
Caution
！
＊
Note

18
・ The number of times for absorption tube usage capability is depending
upon CO2 concentration in sample gas, storage condition, closeness,
temperature and humidity.
In order to make zero calibration more accurately, it is better to use
new absorbent agent or use zero gas.
Following table is the sample of number of times for 1 minute sample
drawing/time. In case that CO2 concentration in the atmosphere can
not be known, replace with new one earlier than followings.
CO2 concentration
in the atmosphere
Expected number of times
for usage capability.
５００ｐｐｍ
１０００ｐｐｍ
２０００ｐｐｍ
４０００ｐｐｍ
Approx. １０００ times
Approx. ５００ times
Approx. ２００ times
Approx. １００ times
・ Do not draw high concentration CO2 gas during zero calibration.
・ Do not blow human expiration to gas inlet during zero calibration.
・ Press ＥＳＣ switch when cancel previous operation.
However, it is not available after setting operation.
＊
Note

19
４－３．Span calibration
Regular span calibration (over 1 time every 6 months) must be done after long time no use
and/or requiring more accurate measuring.
Span calibration is done in following order Preparation → Zero calibration
→ Span calibration .
(1) Preparation Prepare absorption tube or zero gas, span gas and gas sampling bag.
Zero gas, span gas and gas sampling bag are optional accessories.
(2) Zero calibration First of all, make zero calibration.
For zero calibration before span calibration, use absorption tube with absorbent agent.
In order to make span calibration more accurately, it is better to use zero gas.
(3) Span calibration Secondly, make span calibration. Introduce span gas to gas
sampling bag, make span calibration according to following procedure.
８２０ｐｐｍ （Gas concentration indication.）
ＨＯＬＤ ＳＰＡＮ ＫＥＹ Press ＡＶＧ ＳＴ． and ＺＥＲＯ switches
simultaneously for 3 seconds.
ＳＥＴ ＺＥＲＯ ＦＩＬＴＥＲ？ （Connect absorption tube.）
Connect to gas inlet correctly.
Press ＥＮＴＥＲ switch, if OK.
ＳＥＴ ＺＥＲＯ ？ （Start zero calibration.）
Confirm absorption tube is connected firmly.
Press ＥＮＴＥＲ switch after over 1 minute.
Press ＥＳＣ． switch, when cancel.
ＳＥＴＴＩＮＧ ＺＥＲＯ （Zero calibrating.）
Approx. 3 sec. (Zero calibration failure.)
Indication and action at zero calibration failure. （Refer to 3-1.)
ＦＡＩＬ ＺＥＲＯ
（Return to measuring mode by ＥＳＣ． switch.）
ＺＥＲＯ ＳＥＴ ＯＫ （Zero calibration end.）