Maintenance Procedures /Parts Replacement; Changing The Certified Sensor Filter - Honeywell Apex Technical Handbook

MAN0604_Issue 09_02-2013
2110M8030
5.2

MAINTENANCE PROCEDURES /PARTS REPLACEMENT

The following sections describe how to carry out the tasks listed in the maintenance schedule
and how to replace parts suggested by Fault Diagnosis in Chapter 4. It tells how to change the
following items:
• Certified Sensor Filter
• Certified Sensor Cartridge
• Certified Sensor
• Transmitter Unit Front Panel Assembly
• CSA Transmitter Unit User Interface Cover Assembly

5.2.1 Changing the Certified Sensor Filter

The Certified Sensor filter is located in the sensor cap or accessory attached to the end of the sensor
body. This procedure allows the filter to be safely changed with the unit powered-up.
Note: Before starting the procedure check that the new filter is the correct type for the application.
Three filter types are available: Mesh, Hydrophobic and Carbon (see Chapter 2 and
Appendix C).
To replace the filter carry out the following procedure:
(1) Remove the Certified Sensor cap or accessory from the sensor body.
Rotate the cap or accessory in an anticlockwise direction by 1/4 turn to release the bayonet
fitting and pull off.
(2) Remove the existing filter.
The filter is held in place in the cap by its three lugs. Carefully prise the filter free from the lug
location points in the cap or accessory.
5. MAINTENANCE
Filter
Filter
lug location
Sensor body
Lug
(3 off)
Sensor cap
or accessory
90
Apex