Sensor Replacement; Pellistor Sensor Replacement; Electrochemical Sensor; Infrared Sensor - Prosense PQ Series Installation And User Manual

Sensor replacement:

The Flammable Catalytic and Toxic ECC cells that are used with the Prosense Sensor Head
have limited serviceable parts. Detector must be diagnosed by service personnel when they
have reached the end of their operational life or faced with a fault to follow correct
procedure.

Pellistor sensor replacement:

Due to current technical design pellistor sensors are not replaceable in the field. The whole
sensor head assembly must be replaced once the pelistor sensor has reached end of its life or
in case of any failure.

Electrochemical sensor:

The electrochemical sensors are mounted to sensor electronic module inside the sensor head
and it is possible to perform replacement in the field. Once replacement sensor on hand
follow the steps given below:
1- Power-off the detector via disconnecting power cable from control panel or supply
2- Use allen key nr3 to loosen locking grub screw on sensor head
3- Remove the sensor head cap
4- Check the sinter and if it blocks the air ventilation replace the sinter via steps given in
"Sinter Replacement" section.
5- Remove electrochemical sensor from sensor module.
6- Check sensor electronic module. Some EEC sensors might leak to the sensor PCB and
create unrepairable hazard on PCB. The whole sensor head must be replaced if there is
any chemical leakage on sensor PCB.
7- Install the new sensor in to sensor PCB.
8- Install the sensor head cab and fix the locking grub screw.
9- Power-on the detector and wait at least 4 hours
10- Perform full calibration.

Infrared Sensor:

The NDIR sensors are mounted to sensor electronic module (sensor PCB) inside the sensor
head and it is possible to perform replacement in the field. Once replacement sensor on hand
follow the steps given below:
1- Power-off the detector via disconnecting power cable from control panel or supply
2- Use allen key nr3 to loosen locking grub screw on sensor head
3- Remove the sensor head cap
4- Check the sinter and if it blocks the air ventilation replace the sinter via steps given in
"Sinter Replacement" section.
5- Remove NDIR sensor from sensor module.
6- Install the new sensor into sensor PCB.
7- Install the sensor head cab and fix the locking grub screw.
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