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7
D e t e c t i o n
User Manual
Single Sustainable Gas Detector PDM+
D e t e c t i o n
3. Mode
3.1 MEASUREMENT MODE
When activated, in measuring mode, gas concentration will appear on the
screen. Oxygen concentration is displayed in percent by volume (%vol)
and toxic concentration is displayed in parts per million (ppm).
3.2 DISPLAY MODE
In the Measuring Mode, by pressing key (
) for one second, the following icons will appear in order:
(only for oxygen) ->
-> STEL value -> TWA value-> Clr Max-> Clr TWA/STEL ->1st alarm
set point --> 2nd alarm set point -> STEL setpoint -> TWA Set point-> Firmware version -> Remaining
Calibration Day -> Calibration
If you press the key or do not push any button for a second, the PDM+ will return to Measuring Mode.
3.3. ALARM ACTIVATION & CONFIGURING ALARM SET POINTS
When a gas concentration exceeds alarm set points, or will be displayed and the device will
vibrate, flash its LEDs, and beep. To stop alarms, evacuate immediately to a clean air location.
When bump test or calibration failed, will be displayed and the PDM+ will beep intermittently.
To configurate the alarm setpoints, please follow the steps below.
• Press the button until the above alarm setpoint is displayed
• Press and hold the button for three seconds and the first digit of alarm setpoint starts to blink
• To increase the value, press the button for one second
• To save the alarm setpoints, press the key for 3 seconds
* Ensure that the second alarm setpoint must be greater than first alarm setpoint.
* Ensure Standard Factory alarm setpoints vary depending on countries, states, and companies.
3.4. DEFAULT ALARM SET POINTS
Gas
O
2
CO
H
2
S
H
2
SO
2
Cl
2
NH
3
NO
2
Low alarm
19%
25 ppm
5 ppm
100 ppm 1 ppm
1.5 ppm
20 ppm
5 ppm
High Alarm
23%
25 ppm
5 ppm
100 ppm 1 ppm
1.5 ppm
20 ppm
5 ppm
STEL
-
100 ppm 3.2 ppm
-
0.3 ppm
unknown 50 ppm
1
TWA
-
20 ppm
1.6 ppm
-
0.3 ppm
unknown 20 ppm
0.5 ppm
For high and low alarm
For TWA and STEL Alarm
Disclaimer: The default Set Points of these gases: H
2
, SO
2
, Cl
2
, NH
3
and NO
2
, are subject to change without notice.
Caution
Before changing alarm setpoints, please ensure the alarm set points are in compliance with
your local guidelines.
NOTE: STEL and TWA functions are unavailable for O
2
and H
2
variants.
Alarm values can be locked with the IR link
