4195KA, KB, KC, and KS Controllers
Instruction Manual
Form 5207
April 2007
6-41
Remote Set Point Linearity Adjustment
WARNING
Refer to the Maintenance WARNING
on page 6-1.
Adjust the linearity by loosening and repositioning
the linearity adjustment screw in the curved slot on
the lever arm of pivot assembly B (key 115).
Adjusting the linearity affects the zero and span
adjustment.
1. Adjust the remote set point pressure to 50
percent of the remote set point input range. The set
point indicator should indicate mid-scale ±1 percent
of the process scale span. If not, make fine
adjustments by loosening the zero adjustment
locking screw and turning the zero adjustment
screw.
2. Adjust the remote set point pressure to 0 percent
of the remote set point input range and note the
indicator position relative to the process scale lower
limit.
3. Adjust the remote set point pressure to 100
percent of the remote set point input range and note
the indicator position relative to the process scale
upper limit.
4. If the greatest misalignment is positive (the set
point indicator is to the right of the process scale
limits), loosen the linearity screw and move it
clockwise in the slot. If the misalignment is negative,
move the linearity screw counterclockwise in the
slot.
5. If the misalignment is greater than 1 percent of
the process scale span at the lower and upper limits,
with one positive and the other negative, perform the
remote set point zero and span adjustment
procedure to correct a span error.
6. Repeat steps 1 through 4 until lower, middle, and
upper indications are within ±1 percent of the
process scale markings.
Auto/Manual Station (suffix letter E)
Maintenance
Replacing the Auto/Manual Station
WARNING
Refer to the Maintenance WARNING
on page 6-1.
Refer to figures 7-1 and 7-7 for key number
locations.
Note
This procedure also permits
replacement of the switch manifold
O-rings (key 312), the auto/manual
tubing assembly (key 138), and the
frame gaskets (keys 4 and 5).
Disassembly
1. Remove the controller assembly from the case
by performing steps 1 through 3 of the case and
cover replacement procedure.
2. Loosen the screw (key 316) that holds the
auto/manual station (key 273) to the controller
frame.
3. Loosen the two screws (keys 314 and 315) that
hold the auto/manual station to the auto/manual
tubing assembly (key 138).
4. Remove the auto/manual station from the
controller frame.
5. Remove the switch manifold O-rings (key 312).
6. Carefully loosen the nut on the relay nozzle
tubing assembly (key 18) where it connects to the
auto/manual tubing assembly (key 138). Loosen
three screws (keys 34 and 131) and remove the
tubing assembly and frame gaskets (keys 4 and 5).
7. Inspect the gaskets (keys 4 and 5) and O-rings
(key 312) for wear. Replace if necessary.
Assembly
1. Install the gaskets and tubing assembly to the
frame. Start, but do not tighten, the three screws
(keys 34 and 131) and the nut on the relay nozzle
tubing assembly (key 18).
2. Install the switch manifold O-rings (key 312) and
secure the auto/manual station to the controller
frame with the screw (key 316) and to the tubing
assembly (key 138) with the two screws (keys 314
and 315). Do not tighten any screws.
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