RAEGuard 3 User Manual
40
Toxic and Oxygen Sensor Replacement
Note: Waterproof Cap has static risk. When installing or operating, requires
special attention.
10.2 Replacing Modules within the Transmitter
The circuit module in the RAEGuard 3 transmitter housing contains 3 replaceable
modules: Display PCB, Main PCB, and Terminal PCB (Relay output will not be
provided if relay function is not ordered).
Unscrew and remove the cover of transmitter and pull the circuit board module from
it, to easily replace the circuit module. The procedure of replacing the circuit module
is as follows:
1. Important: Switch off the external power.
2. Unscrew and remove the cover of transmitter.
3. Pull the circuit board module from it, to easily replace the circuit module.
4. Unplug all connection terminals connected to the circuit module.
5. Loosen and remove the four ST2.9x13 self-tapping Phillips screws.
6. Carefully remove the circuit board cover.
7. Carefully remove the circuit board that will need to be replaced and fit
the new circuit board.
Note: Make sure that the board replacement personnel are free of static
electricity!
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