Replacing The Magnetic Feedback Assembly; Tools Required - Emerson FIELDVUE DVC6200f Instruction Manual

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
1-1. It may also impair operations and
the intended function of the device.
Because of the diagnostic capability of the DVC6200f,
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
DVC6200f 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.
November 2010
Maintenance and Troubleshooting
Tool
Phillips Screwdriver
Hex key
Hex key
Hex key
Hex key
Hex key
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 7-1 lists the tools required for maintaining the
DVC6200f digital valve controller.
Component Replacement
When replacing any of the components of the
DVC6200f, the maintenance should be performed in
an instrument shop whenever possible. Make sure that
the electrical wiring and pneumatic tubing is
disconnected prior to disassembling the instrument.
Removing the Module Base
Refer to figure 8-2 for key number locations.
To avoid personal injury or equipment
damage from bursting of parts, turn
off the supply pressure to the digital
valve controller and bleed off any
excess supply pressure before
attempting to remove the module
base assembly from the housing.
1. Unscrew the four captive screws in the cover
(key 43) and remove the cover from the module
base (key 2).
2. Using a 6 mm hex socket wrench, loosen the
three-socket head screws (key 38). These screws
are captive in the module base by retaining rings
(key 154).
Table 7-1. Tools Required
Size Component
Relay, printed wiring board
assembly, and cover screws
5 mm Terminal box screw
1.5 mm Terminal box cover screw
2.5 mm I/P converter screws
5 mm Travel sensor screws
6 mm Module base screws
WARNING
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