WatchGas PDM - Calibration Procedures; Fresh Air Calibration

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Detection
User Manual Single Gas Detector PDM
D e t e c t i on
5. Calibration
5.1. FRESH AIR CALIBRATION
Press and hold the key for 5 seconds to enter the calibration mode ( ), icon and ‘CAL’ mark will
appear on the LCD.
Press the key for three seconds to initiate calibration. When calibration begins, a countdown (starting
at 10) will appear on the screen.
Caution
Initial calibration is performed on all devices prior to shipment. Once received, calibration
should be regularly depending on frequency of use.
Once completed, will appear on the LCD.
If calibration fails, will appear on the LCD.
Check that the air is clean and that no contaminants are
blocking the sensor opening and try again. If fresh air
calibration fails repeatedly, contact WatchGas.
Caution
Calibration should be performed in a fresh-air environment that is free for any contaminants
and other gases. Preferably, do not perform calibration in a conned space.