PEMTECH PT395 Series - Alarm Conditions; Alarm & Sensor Fault

PT395 Series Detector
17
% / ppm
Volume
mA Output
0
4.0
10
5.6
20
7.2
25
8.0
50
12.0
75
16.0
100
20.0
The above table is for the detector with Full scale range of 100 ppm / % (volume)
Alarm Conditions
Alarm (High gas reading)
When the gas concentration reaches the predefined alarm set point then the alarm
condition exists. The sensor will flash “ALr” for few moments and then display
the gas reading. Also the alarm relay is energized.
For oxygen the alarm is activated on the falling edge. For example if the alarm level is
set at 18 %, the relay will be energized if the oxygen level is at or falls below 18%
Fault (Sensor Fail)
PT395 is in Fault (Malfunction) condition when the sensor assembly malfunctions. In
Fault condition the 4-20mA output generated would be less than 1.0 mA. The
sensor displays “FLt” when sensor in Fault.