12 Maintenance
12.1 Transmitter
The Rosemount 56 Transmitter used with the TCL requires little routine maintenance.
Clean the transmitter case and front panel by wiping with a clean soft cloth dampened
with water only. Do not use solvents, like alcohol, that might cause a buildup of static
charge.
The sensor circuit board (PN 24203-01) is replaceable. If you have a dual input transmitter,
consult the Rosemount 56 instruction manual for the part number of the other board.
To replace the board:
WARNING!
RISK OF ELECTRICAL SHOCK
Disconnect main power and relay contacts wired to separate power source before servicing.
Procedure
1. Turn off power to the transmitter.
2. Loosen the four screws holding the front panel in place and let the front panel drop
down.
3. Loosen the gland fitting and carefully push the sensor cable up through the fitting as
you pull out the circuit board.
4. Once you have access to the terminal strip, disconnect the sensor.
5. Unplug the sensor board from the main board.
See Figure 12-1.
Maintenance
Manual 53
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