Capsular Element Controller Maintenance And Calibration; Replacing The Capsular Element Assembly; Replacing Capsular Element Parts; Replacing The Long Pivot Assembly - Emerson Fisher KC Series Instruction Manual

Instruction Manual
Form 5207
April 2007
Capsular Element Controller
Maintenance and Calibration
Replacing the Capsular Element
Assembly
WARNING
Refer to the Maintenance WARNING
on page 6-1.
Refer to figure 7-5 for key number locations, unless
noted otherwise.
1. Remove process pressure from the controller.
2. Note the hole location and disconnect link 1 (key
90) from the process pointer.
3. Disconnect the process pressure connection
union (key 93) from the pedestal assembly (key 81).
Use two 5/16-inch hex wrenches.
4. Remove the four machine screws (key 127 in
figure 7-3) that attach the capsular element
assembly to the indicator assembly (key 101 in
figure 7-3).
CAUTION
In the following step, do not lift out
the capsular element assembly by
holding the capsular element or
linkages. These parts may be
damaged.
5. Lift out the capsular element assembly by holding
the tie bar (key 97), mounting plate (key 77), travel
stop (key 83), or pedestal assembly (key 81).
6. Position the replacement capsular element
assembly over the mounting screw holes. Install and
tighten the mounting screws (key 127 in figure 7-3).
7. Reconnect link 1 (key 90) to the process pointer
in the same hole noted in step 2.
8. Reconnect the process pressure connection
union (key 93).
9. Apply process pressure to the controller and
check for leaks.
4195KA, KB, KC, and KS Controllers
10. Perform the capsular element maintenance
calibration procedure in this section. Perform the
controller calibration procedures and, if necessary,
the appropriate remote set point calibration
procedure in Section 3, 4, or 5.

Replacing Capsular Element Parts

Refer to the Maintenance WARNING
on page 6-1.
Avoid bending or kinking the drive
flexure during the following
procedures. Bending or kinking the
drive flexure can result in product
damage, as well as impaired
performance.
Refer to figure 7-5 for capsular element key number
locations. Refer to figure 6-19 for adjustment
locations and refer to figure 7-4 for indicator
assembly (without process sensing element) part
locations.

Replacing the Long Pivot Assembly

1. Remove process pressure from the controller.
2. Remove the tie bar (key 97) from the capsular
element assembly by removing the mounting screws
(key 103).
3. Note the hole position of link 5 (key 88) and
disconnect the link from the pivot adjustment arm on
the long pivot clevis assembly (key 78).
4. Using an Allen wrench, remove the cap screw
and washer (keys 12 and 13) that attach the drive
flexure (key 79) to the pivot adjustment arm of the
long pivot clevis assembly. Take care not to bend or
kink the drive flexure.
5. Remove the two screws (key 102) attaching the
long pivot clevis assembly to the mounting plate
(key 77).
WARNING
CAUTION
6-27