Operation
21
English
Toxic and flammable gas sensor modules should be replaced when they fail
to calibrate or show a very low response to test gas. PID and Oxygen sensors
must be replaced every two years.
To replace a sensor module:
1. Switch off and isolate power to the detector.
2. Loosen the grub-screw and unscrew the sensor retainer.
3. Carefully withdraw the sensor module by grasping the top and bottom of
the moulding.
4. Fit the replacement sensor (having checked that the part number matches
that stated on the detector junction box label). Take care to align the
locating pins correctly with the slots in the
Xsafe Bright
enclosure.
5. Re-fit the sensor retainer having first inspected the sinter to make sure that
it has not become contaminated. Contaminated sinters must be replaced
as any blockages may prevent gas from reaching the sensor. Ensure the
grub-screw is re-secured.
6. Zero and calibrate the new sensor.
Warning: Xsafe Bright sensor modules are NOT compatible with
Xgard or Xsafe sensor Modules.
3.9 IR Carbon Dioxide
It is unlikely an infrared sensor will need replacement however if it is damaged
or more than 10 years old it may be replaced using the following procedure:
1. Switch off and isolate power to the detector.
2. Loosen the grub-screw and unscrew the sensor retainer.
3. Carefully withdraw the sensor module by grasping the top and bottom of
the moulding.
4. Fit the replacement sensor (having checked that the part number matches
that stated on the detector junction box label). Take care to align the
locating pins correctly with the slots in the
Xsafe Bright
enclosure.
5. Re-fit the sensor retainer having first inspected the sinter to make sure that
it has not become contaminated. Contaminated sinters must be replaced
as any blockages may prevent gas from reaching the sensor. Ensure the
grub-screw is re-secured.
6. Zero and calibrate the new sensor.
