4200 Series Transmitters
Instruction Manual
Form 5596
July 2005
26
39A6195-C / DOC
43
8
Figure 12. Field Circuit Printed Wiring Board
CAUTION
Remove the wiring assembly or
assemblies connected between the
potentiometer and the transmitter
printed wiring board before removing
the pot/bushing assembly (key 3) from
the transmitter housing (key 1). Failure
to disconnect the wiring assembly(ies)
may result in damage to the wiring.
1. Remove power from the instrument.
2. Remove the covers (key 2, figure 13 or 14) from
the transmitter housing.
3. Note the location of the field wiring, and
disconnect the wiring from the field circuit printed
wiring board, or from the barrier strip (key 11, figure
14), mounted in the field wiring compartment.
4. Remove the transmitter from its mounting.
5. Perform the transmitter printed wiring board
removal procedure.
6. Remove the pot/bushing assembly (key 3) from
the housing (key 1).
7. When installing the pot/bushing assembly (key 3)
in the transmitter housing, apply lubricant (key 50) to
the bushing threads.
8. Install the pot/bushing assembly in the transmitter
housing and tighten. Ensure free rotation of the
potentiometer shaft.
9. Perform the printed wiring board replacement
procedure.
10. Perform the installation, potentiometer
alignment, and calibration procedures to return the
transmitter to service.
Parts Ordering
When corresponding with the Fisher sales office
about this equipment, always mention the transmitter
serial number. When ordering replacement parts,
refer to the part number of each required part as
found in the following parts lists.
Note
Use only genuine Fisher replacement
parts. Components that are not
supplied by Fisher should not, under
any circumstances, be used in any
Fisher instrument. Use of components
not supplied by Fisher will void your
warranty, might adversely affect the
performance of the instrument, and
might jeopardize worker and
workplace safety.
Note
Neither Emerson, Emerson Process
Management, Fisher, nor any of their
affiliated entities assumes
responsibility for the selection, use
and maintenance of any product.
Responsibility for the selection, use
and maintenance of any product
remains with the purchaser and
end-user
