4. How to Use
4-5. Performing air calibration
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4-5. Performing air calibration
Perform air calibration after checking the following points at maintenance before starting work or if the
zero point deviates even though fresh air is drawn.
<Performing Air Calibration in Surrounding Atmosphere>
Check that the surrounding air is fresh.
<Purge Air Environment>
Air calibration cannot be performed when a base gas is set to “N2” or “CO2”.
To perform air calibration, set a base gas to “AIR” beforehand. For details about the base gas setting, see
“5-2. Concentration displayed gas reading setting (base)" (P. 31).
LCD display
1
In the detection mode,
hold down the AIR
button.
2
Release the AIR button
when the display
changes from "AirCL -
HOLD AIR" to "AdJ -
RELEASE".
(Buzzer sound: Three times
<blip, blip, blip>)
▼
▼
The zero adjustment is done
and the gas detector returns to
detection mode.
(Buzzer sound: Once <blip>)
If air calibration fails, "FAIL -
AIR CAL" is displayed.
Press the RESET button to
reset the alarm. The gas
detector returns to the
detection mode (before
adjustment).
