8
Single gas detector
PDM
(starting at 10) will appear on the screen.
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
confined space.
5.2. STANDARD GAS CALIBRATION
Attach the calibration adapter to the PDM and to a gas cylinder with a concentration matching the
calibration concentration. Check 3.1. Display Mode to check the calibration concentration.
Press and hold the key for 5 seconds to enter calibration mode ( ),
icon and ‘CAL’ mark will
appear on the LCD. Press the key again for a second, to switch to standard gas calibration,
appears.
Start the flow of the gas cylinder by opening the regulator.
Press the key for three seconds to initiate calibration. When calibration begins, a countdown will
appear on the screen. The duration of the countdown depends upon the sensor type and can be
changed using the WatchGas IR link.
