WatchGas PDM+ - Bump Test; Sensor & Battery Replacement; Sensor Replacement

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Detection
User Manual Single Sustainable Gas Detector PDM+
D e t e c t i on
6.2. BUMP TEST
The interval of Bump test is 1~365days, and the default is switched o. To initiate the bump test, set
the bump test interval. Once the bump test interval expires, Bts message will ash.
Put the PDM+ in the docking station with a valid and full gas cylinder. Alternatively, attach the
calibration adapter to PDM+ and a valid and full gas cylinder. Press and hold the key for 3 seconds, the
TST message will be displayed for 45 seconds (To cancel, press the button for one second). Within the
45 seconds, start the ow from the gas cylinder. If no gas is applied, the bts message will ash again.
If the test is successful, SUC message with will be displayed for 30 seconds. Stop the ow, remove
the calibration adapter. If the test fails, FA message with , will be displayed and BTS message will be
ashing until the test is successful. If the bump test repeatedly fails, contact WatchGas.
7. Sensor & Battery Replacement
Caution
It is absolutely prohibited to replace battery at potential explosion or dangerous regions.
Replace the battery in a clean environment, which has no hazardous gases.
Replacement of components can invalidate the intrinsic safety function.
Replacing the sensor and battery should be performed by authorized sellers, agents,
distributors, or managers. Contact WatchGas if replacement is needed.
Disassembly should be necessary only for sensors & battery replacement. After the sensor
replacement, Fresh air and SPAN calibration should be done. Before disassembling, please
turn o the power and remove screws.
Only use SB-AA02 3.6V battery.
7.1. SENSOR REPLACEMENT
1. Deactivate the detector
2. Remove the 6 screws on the back case and carefully open te case.
3. Remove the 2 screws on the PCB board.
4. After removing the battery, replace with the new sensor matching with the gas type. For instance,
If you have the PDM+ CO, the CO sensor should be used for the replacement.
5. Assemble the detector.
6. Have the sensor stabilized for 5 minutes before use.
7. After assembling, perform the fresh air calibration and standard calibration with the concentration
in this manual.
8. Check the settings.