D e t e c t i o n
PDM+ Single Sustainable Gas Detector
User Manual
10
D e t e c t i o n
5.4. RETURN TO DETECTING MODE.
In the standard calibration mode , press the key for a second to toggle fresh air calibration, standard
calibration, and ESC. In the ESC mode, press the key for 3 seconds, the PDM+ will get out of the
calibration mode and return to Detection mode.
NOTE: Span calibration value can be change in the device and IR link software
Once completed,
will appear on the LCD. After a few
seconds, the PDM+ will return to Detection mode.
If calibration fails, will appear on the LCD.
Check that the gas cylinder is not empty and that is has not
expired. Also make sure that no contaminants are blocking the
sensor opening and try again. If standard gas calibration fails
repeatedly, contact WatchGas.
6. Self Test & Bump test
6.1 SELF TEST
The default interval of the Self-Test is 20hr, meaning the PDM+ will ask for a self test after each 20
hours of use. By default the Self-Test setting is turned off.
The interval is configurable via IR-Link between 8~20 hours. The self test can also be switched off via
IR-Link.
When the interval is activated, STS message will flash. The message will flash until users perform the
Self test.
Once you press the button, it will test buzzer, LED, Vibration, LCD, and show alarm thresholds. After the
test is completed, END message with
icon will be displayed. (Users are required to check the test
processes.)
CALIBRATION CONCENTRATION.
Gas
O
2
CO
H
2
S
H
2
SO
2
Cl
2
NH
3
NO
2
Concentration
0.0%Vol.
(99,9% N
2
) 100 ppm
50 ppm
500 ppm
10 ppm
10 ppm
100 ppm
10 ppm
