Terminal Box; Removing The Terminal Box; Replacing The Terminal Box; Troubleshooting - Fisher FIELDVUE DVC6200 Instruction Manual

DVC6200 Digital Valve Controller
Perform the following procedure to replace the
gauges, tire valves, or pipe plugs. Refer to figure
8-2and 8-3 for key number locations.
1. Remove the front cover (key 43).
2. Remove the gauge, pipe plug, or tire valve as
follows:
For gauges (key 47), the flats are on the gauge case.
Use a wrench on the flats of the gauge to remove the
gauge from the module base. For double-acting
instruments, to remove the supply gauge remove one
of the output gauges.
For pipe plugs (key 66) and tire valves (key 67),
use a wrench to remove these from the module base.
3. Apply sealant (key 64) to the threads of the
replacement gauges, pipe plugs, or tire valves.
4. Using a wrench, screw the gauges, pipe plugs, or
tire valves into the module base.
7

Terminal Box

Refer to the Maintenance WARNING at
the beginning of this section.
Refer to figure 8-2 for key number locations.
The terminal box is located on the housing and
contains the terminal strip assembly for field wiring
connections.

Removing the Terminal Box

To avoid personal injury or property
damage caused by fire or explosion,
remove power to the instrument
before removing the terminal box
cover in an area which contains a
potentially explosive atmosphere or
has been classified as hazardous.
1. Loosen the set screw (key 58) in the cap (key 4) so
that the cap can be unscrewed from the terminal box.
2. After removing the cap (key 4), note the location of
field wiring connections and disconnect the field wiring
from the terminal box.
76
WARNING
WARNING
3. Separate the module base from the housing by
performing the Removing the Module Base procedure.
4. Disconnect the terminal box wiring connector from
the sensor board in the housing assembly (key 50).
5. Remove the screw (key 72). Pull the terminal box
assembly straight out of the housing.

Replacing the Terminal Box

Note
Inspect all O-rings for wear and
replace as necessary.
1. Apply silicone lubricant to the O-ring (key 35) and
install the O-ring over the stem of the terminal box.
2. Insert the terminal box assembly stem into the
housing until it bottoms out. Position the terminal box
assembly so that the hole for the screw (key 72) in the
terminal box aligns with the threaded hole in the
housing. Install the screw (key 72).
3. Connect the terminal box wiring connector to the
sensor board in the housing assembly (key 50).
Orientation of the connector is required.
4. Reassemble the module base to the housing by
performing the Replacing the Module Base procedure.
5. Reconnect the field wiring as noted in step 2 in the
Removing the Terminal Box procedure.
6. Apply silicone lubricant to the O-ring (key 36) and
install the O-ring over the 2-5/8 inch threads of the
terminal box. Use of a tool is recommended to prevent
cutting the O-ring while installing it over the threads.
7. Apply lubricant (key 63) to the 2-5/8 inch threads
on the terminal box to prevent seizing or galling when
the cap is installed.
8. Screw the cap (key 4) onto the terminal box.
9. Install a set screw (key 58) into the cap (key 4).
Loosen the cap (not more than 1 turn) to align the set
screw over one of the recesses in the terminal box.
Tighten the set screw (key 58).

Troubleshooting

If communication or output difficulties are experienced
with the instrument, refer to the troubleshooting chart
in table 7-3. Also see the DVC6200 Troubleshooting
Checklist on page 80.
September 2010