Combustion Oxygen Monitor
Endura AZ20 Series Probe
6 Dismantling and Reassembly – Transmitter
38
IM/AZ20M–EN
Rev. B
6.2 Replacing the Integral Transmitter Backplane
6.2.1 Removing the Backplane
1. Remove the transmitter cover and cartridge as detailed in
Section 6.1.2, page 37, steps 2 to 4.
Referring to Fig. 6.3:
2. Unplug the probe signal connectors
A
.
3. Unscrew and remove the 3 backplane retaining screws
B
.
4. Lift the backboard
C
out of the probe transmitter
housing
D
and discard the backboard – refer to the
transmitter User Guide (IM/AZ20E–EN) for disposal
recommendations.
5. Proceed to Section 6.2.2, page 38 to fit a new backplane.
6.2.2 Fitting a New Backplane
Referring to Fig. 6.4:
1. Position the new backboard
A
in the probe’s transmitter
housing
B
.
2. Tighten the 3 backplane retaining screws
C
to secure
the backplane
A
to the probe’s transmitter housing
B
.
3. Reconnect the probe’s signal connectors
D
, ensuring
they are plugged into the correct terminations.
4. Proceed to Section 6.1.2, page 37, steps 5 to 8 to refit the
cartridge (the refitting procedure is the same for both
existing and new cartridges).
Warning.
Isolate the transmitter from power supplies before
removing the cover and label the isolator to prevent
accidental switch on.
Fig. 6.3 Removing the Backplane from an Integral Transmitter
A
B
C
D
Fig. 6.4 Fitting a New Backplane to an Integral Transmitter
D
C
A
B
