Fisher® FIELDVUE DVC6200 Digital Valve Controller

Instruction Manual
D103605X012
Maintenance and Troubleshooting
July 2012
Pneumatic Relay
Refer to figure 7‐2 or 7‐4 for key number locations. The pneumatic relay (key 24) is located on the front of the module
base.
Note
After relay submodule replacement, calibrate the digital valve controller to maintain accuracy specifications.
Removing the Pneumatic Relay
1. Loosen the four screws that attach the relay (key 24) to the module base. These screws are captive in the relay.
2. Remove the relay.
Replacing the Pneumatic Relay
1. Visually inspect the holes in the module base to ensure they are clean and free of obstructions. If cleaning is
necessary, do not enlarge the holes.
2. Apply silicone lubricant to the relay seal and position it in the grooves on the bottom of the relay as shown in
figure 6‐5. Press small seal retaining tabs into retaining slots to hold relay seal in place.
Figure 6‐5. Pneumatic Relay Assembly
W8074
RELAY SEAL
3. Position the relay (with shroud) on the module base. Tighten the four screws, in a crisscross pattern, to a final
torque of 2 Nm (20.7 lbfin).
4. Using the Field Communicator, verify that the value for Relay Type parameter matches the relay type installed.
5. After replacing the relay and verifying the relay type, calibrate travel or perform touch‐up calibration to maintain
accuracy specifications
Gauges, Pipe Plugs, or Tire Valves
Depending on the options ordered, the DVC6200 or DVC6205 will be equipped with either gauges (key 47), pipe plugs
(key 66), or tire valves (key 67). Single‐acting direct instruments will also have a screen (key 236, figure 7‐3). These are
located on the top of the module base next to the relay.
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