13
4-3. Performing air calibration
NOTE
If the air calibration fails, AIR - FAIL is displayed on the
LCD. Press the POWER/MODE button to reset the alarm
(calibration failure). When the alarm is reset, the value
before air calibration is displayed.
Item LCD
Details
Detection
Mode
* Check that the gas
monitor is in the
detection mode.
AIR
AIR -
HOLD
* Keep the AIR button
pressed until the LCD
display switches from
AIR - HOLD (1st buzzer
sound, blip) to ADJ
(2nd buzzer sound,
blip) and then release
the button.
AIR
ADJ
Returns to
the
detection
mode
* After adjustment, it
automatically 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 leading to dangers when the gas leaks.
CAUTION
Perform air calibration under pressure and
temperature/humidity conditions close to those in
the operating environment and in fresh air.
Perform air calibration after the reading is
stabilized.
If there is a sudden temperature change of 15ºC or
more between the storage and operation locations,
turn on the power of the gas monitor, 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.
