Sensor Pcb Replacement; Sinter Replacement; Sensor Head Replacement - Prosense PQ Series Installation And User Manual

8- Power-on the detector and wait at least 30 minutes
9- Perform full calibration.

Sensor PCB replacement:

Due to current technical design restrictions sensors PCBs are not replaceable in the field. The
whole sensor head assembly must be replaced once the sensor PCB damaged or in case of any

Sinter replacement:

failure.
Due to environmental conditions the metal filter - sinter at sensor head might lost
permeability that could negative impact on sensor performance. For example if the
installation includes cement or similar dust the sinter would be block the air/gas entry to
sensor. The sinter should be checked visually and replaced if necessary. The sinter is located
inside the sensor head cap and sensor head cap must be replaced when sinter needs
replacement. To replace sinter please check diagram-2 and follow the below procedure:
1- Power off the detector via disconnecting power cable from control panel or supply
2- Loosen the locking grub screw via allen key nr3
3- Unscrew the sensor head cap that holds the dirty sinter
4- Remove the sinter holder via using two holes on it
5- Remove the old sinter
6- Install new sinter to its location, make sure sinter located correctly to designed area
7- Install sinter holder and fix completely to hold sinter to go back
8- Screw the sensor head cap including the clean sinter
9- Fix the Locking grub screw

Sensor head replacement:

Prosense sensor head is a separate part that can be replaced. The sensor head includes
integrated sensor, electronic device and sinter in it. PQ series sensor head is pre-calibrated
and will start function immediately following the replacement. To replace sensor head:
1- Power-Off the detector via disconnecting power cable from control panel or supply
2- Open the detector cover
3- Disconnect sensor cables from the detector main board
4- Remove the sensor head from the body via using Nr 38 wrench key.
5- Install sensor head
6- Sensor head must be fixed to enclosure with 20Nm toque
7- Connect the sensor cables to detector main board
8- Close the detector cover
9- Power-On Prosense detector
10- Leave detector working at least 4 hours in clean air environment
11- Check detector calibration.
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