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mote 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
Refer to figures 5–24 and 5–31 for key number loca-
tions.
This procedure also permits replace-
ment of the switch manifold O-rings
(key 312), the auto/manual tubing as-
sembly (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 as-
sembly 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
8. 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).
9. 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
Note
4195KA, KB, and KC Series
(key 138) with the two screws (keys 314 and 315). Do
not tighten any screws.
In the next step, take care to tighten the
two screws (keys 314 and 315) evenly.
Uneven tightening could damage the
tubing assembly.
10. Position the auto/manual station as far down on
the frame and toward the scale as possible. Carefully
tighten the two screws (keys 314 and 315) so that the
auto/manual station contacts the three pads on the
tubing assembly.
11. Carefully tighten the remaining screws and nuts.
12. Plug the controller output connection and apply
supply pressure to the controller. Check for leaks.
13. Position the controller assembly in the case and
start, but do not tighten the nine mounting screws.
Slide the controller assembly down to assure an O-
ring seal at the pressure connections along the bottom
of the case. Hold the controller assembly in place
while tightening the nine mounting screws.
14. Perform the appropriate calibration procedure in
section 3 or 4.
Replacing the Switch Body Assembly,
Lever O-Ring, Switch Body O-Ring, and
Tubing Assembly
Refer to figure 5–31 for key number location.
Disassembly
1. Remove the auto/manual station from the controller
as described in steps 1 through 4 of the Replacing the
Auto/Manual Station procedure.
2. Loosen the two screws (key 288) and remove the
lever cover plate (key 305).
The lever spring (key 302) is under pre-
load. To avoid personal injury or losing
parts, carefully disassemble the auto/
manual station.
3. Using a 1/16-inch (1.5 mm) punch, push the groove
pin (key 303) out toward the surface of the lever cover
plate.
4. Remove the switch lever (key 304), lever spring
(key 302), and lever spring seat (key 301).
CAUTION
CAUTION
5–35
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