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The trouble shooting below does not cover all the problems. It might help to discover the
causes of the problems which seem to occur the most frequency.
Condition
Cause
Treatment
Power does
not turn on.
・
Empty batteries.
・
Battery consumed up.
・
Wrong battery direction.
Install battery correctly,
referring "4-1. Replacing
battery".
・
Too short pressing time of ON/OFF
switch.
Keep on pressing ON/OFF
switch for approx. 3 seconds
(until start displaying).
Pump does not
work.
・
Low battery voltage.
Replace battery with new one
(refer to 4-1.), turn power on
again (refer to 2-2.).
・
Absorbent cotton is clogged.
Replace absorbent cotton with
new one (refer to 4-4.).
・
Protective filter inside of gas inlet is
clogged.
Replace protective filter with
new one.
・
Display “FAIL PUMP”. By giving an
excessive shock/impulse to the
instrument such as
dropping/throwing etc and by using
for a long time period, such message
may be displayed.
Carry out the daily check or
regular check (refer to 4.).
No suction.
・
Absorbent cotton and/or tube at the
side of gas in are detached or
clogged.
Check the clog/twist etc of
absorbent cotton and tube
(refer to 2-1.).
Indicate below
300ppm by
drawing
atmosphere.
・
Normally, CO2 concentration in the
atmosphere is 300 ～ 500ppm
（outside or room）. The message
may be displayed in case that
atmospheric pressure and/or
temperature change abnormally, or in
case of no calibration for a long time.
Carry out zero calibration
and/or span calibration in
normal atmospheric pressure
and temperature.
・
The massage may be displayed in
case that zero and/or span
calibration are carried out correctly.
Use calibration gas and/or
absorption tube correctly.
６．Trouble shooting
