Fisher® FIELDVUE DVC6200 Digital Valve Controller

Maintenance and Troubleshooting
July 2012
Instruction Manual
D103605X012
from fire or explosion if natural gas is used as the supply medium and appropriate preventive measures are not taken.
Preventive measures may include, but are not limited to, one or more of the following: ensuring adequate ventilation
and the removal of any ignition sources.
Ensure that the cover is correctly installed before putting this unit back into service. Failure to do so could result in
personal injury or property damage from fire or explosion.
CAUTION
When replacing components, use only components specified by the factory. Always use proper component replacement
techniques, as presented in this manual. Improper techniques or component selection may invalidate the approvals and
the product specifications, as indicated in table 1‐2, and may also impair operations and the intended function of the
device.
Because of the diagnostic capability of the DVC6200, predictive maintenance is available through the use of ValveLink
software. Using the digital valve controller, valve and instrument maintenance can be enhanced, thus avoiding
unnecessary maintenance. For information on using ValveLink software, refer to the ValveLink software online help.
Replacing the Magnetic Feedback Assembly
To remove the magnet assembly from the actuator stem, perform the following basic steps.
1. Make sure that the valve is isolated from the process.
2. Remove the instrument terminal box cover.
3. Disconnect the field wiring from the terminal board.
4. Shut off the instrument air supply.
5. Disconnect the pneumatic tubing and remove the DVC6200 or the DVC6215 from the actuator.
6. Remove the screws holding the magnet assembly to the connector arm.
When replacing the instrument, be sure to follow the mounting guidelines in the Installation section. Setup and
calibrate the instrument prior to returning to service.
Module Base Maintenance
The digital valve controller contains a module base consisting of the I/P converter, printed wiring board assembly, and
pneumatic relay. The module base may be easily replaced in the field without disconnecting field wiring or tubing.
Tools Required
Table 6‐1 lists the tools required for maintaining the DVC6200 digital valve controller.
Table 6‐1. Tools Required
Tool Size Component
Phillips Screwdriver
Hex key
Hex key
Hex key
Hex key
5 mm
1.5 mm
2.5 mm
6 mm
Relay, printed wiring board assembly, and cover
screws
Terminal box screw
Terminal box cover screw
I/P converter screws
Module base screws
56