4195KA, KB, KC, and KS Controllers
Instruction Manual
Form 5207
April 2007
6-38
Note
See figure 6-20. The adjustment arm of
the remote set point pivot assembly A
turns on a bushing at each end of the
shaft supporting the adjustment arm.
In the next step, position the shaft so
both bushings ‘‘float’’ inside the
bearings and do not rest against the
end of either bearing.
3. Connect the new drive flexure making sure it
stays straight and vertical. Adjust the length of the
pivot arm, if necessary, until the drive flexure is
straight. Before tightening the drive flexure screws,
hold the pivot assembly A shaft in the middle of the
bushing end play. Be sure neither bushing is resting
against the inside end of either bearing. Tighten the
drive flexure screws to hold the pivot shaft in this
position. Do not bend or twist the flexure when
tightening the screws.
4. Decrease the remote set point pressure to 0 bar
(0 psig).
5. Perform the remote set point maintenance
calibration procedure. Perform the appropriate
process indicator zero and span calibration and
flapper alignment procedure in Section 3, 4, or 5.
Replacing the Remote Set Point Tubing
1. Decrease the remote set point pressure to 0 bar
(0 psig).
2. Using two 5/16-inch open-end wrenches,
disconnect the pressure connection union (key 93)
from the pedestal assembly (key 105) and the
connection to the case exterior at the top of the
case.
3. Remove the tubing (key 104).
4. Install the replacement tubing, and reconnect the
two pressure connections.
5. Apply full remote set point pressure, and check
for leaks.
Replacing Link A
This procedure describes link A (key 116)
replacement in the remote set point assembly.
Figure 6-23 shows the link location.
1. Note the holes where link A is connected.
Disconnect link A (key 116) from the lever arms on
pivot assembly A and pivot assembly B.
2. Loosen the screw in the replacement link A and
adjust the length to match the link being replaced.
Tighten the screw.
3. Refer to figure 6-23 for the correct link
orientation. Attach the replacement link A to the two
lever arms in the same holes noted in step 1.
4. Perform the remote set point maintenance
calibration procedure. Perform the appropriate
process indicator zero and span calibration and
flapper alignment procedures in Section 3, 4, or 5.
Replacing Link B
This procedure describes link B (key 126)
replacement in the remote set point assembly.
Figure 6-23 shows the link location.
1. Note the holes where link B is connected.
Disconnect link B (key 126) from the pivot arm and
from the set point indicator.
2. Loosen the screw in the replacement link B and
adjust the length to match the link being replaced.
Tighten the screw.
3. Refer to figure 6-23 for the correct link
orientation. Attach the replacement link B to the
pivot arm and to the set point indicator in the same
holes as noted in step 1.
4. Perform the remote set point maintenance
calibration procedure. Perform the appropriate
process indicator zero and span calibration and
flapper alignment procedures in Section 3, 4, or 5.
Remote Set Point (suffix letter M)
Maintenance Calibration
Refer to figure 6-23 for parts and adjustment
locations. Refer to figures 7-1 and 7-6 for key
number locations.
Precalibration Procedure
WARNING
Refer to the Maintenance WARNING
on page 6-1.
1. Remove the two screws (key 6) and lift off the
proportional band indicator cover (key 36).
2. Set the proportional band adjustment between
DIRECT and REVERSE.
3. Remove the two screws (key 103) and remove
the tie bar (key 106) from the remote set point
assembly.
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