Emerson Fisher FIELDVUE DVC6000, Инструкция по эксплуатации

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Maintenance and Troubleshooting
September 2013 7-5
5. Install three socket head screws (key 38) in the
module base into the housing. If not already installed,
press three retaining rings (key 154) into the module
base. Evenly tighten the screws in a crisscross pattern
to a final torque of 16 N
m (138 lbf in).
WARNING
Personal injury, property damage, or
disruption of process control can
result if the cable assemblies/wiring
are damaged when attaching the
cover to the module base assembly.
Ensure that the cable assemblies/
wiring are position in the cavity of the
module base so they do not get
compressed or damaged when
attaching the cover to the module
base assembly in step 6.
6. Attach the cover (key 43) to the module base
assembly.
7. For sliding-stem applications only, install the
protective shield onto the side of the replacement
module base assembly (see figures 2-1 and 2-2).
Submodule Maintenance
The digital valve controller’s module base contains the
following submodules: I/P converter, PWB assembly,
and pneumatic relay. If problems occur, these
submodules may be removed from the module base
and replaced with new submodules. After replacing a
submodule, the module base may be put back into
service.
CAUTION
Exercise care when performing
maintenance on the module base.
Reinstall the cover to protect the I/P
converter and gauges when servicing
other submodules.
In order to maintain accuracy
specifications, do not strike or drop
the I/P converter during submodule
maintenance.
SCREEN (FILTER)
LOCATED IN I/P
CONVERTER
SUPPLY PORT
Figure 7-2. I/P Filter Location
O-RING LOCATED
IN I/P CONVERTER
OUTPUT PORT
W8072
I/P Converter
Refer to figures 8-2 through 8-9 for key number
locations. The I/P converter (key 41) is located on the
front of the module base.
Note
After I/P converter submodule
replacement, calibrate the digital valve
controller to maintain accuracy
specifications.
Replacing the I/P Filter
A screen in the supply port beneath the I/P converter
serves as a secondary filter for the supply medium. To
replace this filter, perform the following procedure:
1. Remove the I/P converter (key 41) and shroud
(key 169) as described in the Removing the I/P
Converter procedure.
2. Remove the screen (key 231) from the supply port.
3. Install a new screen in the supply port as shown in
figure 7-2.
4. Inspect the O-ring (key 39) in the I/P output port. if
necessary, replace it.
5. Reinstall the I/P converter (key 41) and shroud
(key 169) as described in the Replacing the I/P
Converter procedure.
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