WatchGas PDM, User Manual

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Single gas detector
PDM
3.4. ALARM SET POINTS
Gas O
2
CO H
2
S H
2
SO
2
NH
3
NO
2
Low alarm 19% 25 ppm 5 ppm 100 ppm 1 ppm 20 ppm 5 ppm
High Alarm 23% 25 ppm 5 ppm 100 ppm 1 ppm 20 ppm 5 ppm
NOTE: Alarm setpoints can be changed using via WatchGas IR link.
3.5. DEFAULT CALIBRATION CONCENTRATIONS
Gas O
2
CO H
2
S H
2
SO
2
NH
3
NO
2
Concentration 18.0% Vol. 50 ppm 10 ppm 500 ppm 5 ppm 50 ppm 5 ppm
4. EVENT LOG
Last 30 events are stored on the PDM. Once 30 events are stored, the oldest log events get
overwritten. Stored log events can be transferred via WatchGas-IR Link.
Each alarm event is recorded as follows:
• Types of alarms
• Alarm concentration in ppm or %
• Peak concentration
5. CALIBRATION
CAUTION
Initial calibration is performed on all devices prior to shipment. Once received,
calibration should be regularly depending on frequency of use.
5.1. FRESH AIR CALIBRATION
To enter the calibration menu press the button x times untill the calibration concentration is dis-
played. Then hold down the button for 3 seconds. 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
Fresh Air Calibration Standard Gas Calibration