4195KA, KB, KC, and KS Controllers
Instruction Manual
Form 5207
April 2007
6-14
LEVELING
SCREW
NUMBER 1
1/2 OF PIN
DIAMETER
CONNECTING TAB ON
FLAPPER ASSEMBLY
W3451 / IL
W4191 / IL
Figure 6-11. Link 2 Adjustment
28. Insert the pivot of the adjustable set point pivot
assembly (key 17) into the hole in the set point
beam assembly (key 23).
29. Insert the screw, with washer (keys 19 and 20),
through the frame (key 3) and start it into the
adjustable set point pivot assembly (key 17), but do
not tighten.
30. Squeeze the adjustable set point pivot assembly
against the set point beam assembly. Check to be
sure the nozzle is still centered on the flapper and
tighten the machine screw (key 19). If necessary,
loosen both machine screws (key 19) to allow
slightly moving the adjustable set point pivot
assembly, set point beam assembly and the relay
nozzle tubing assembly as a unit to center the
nozzle on the flapper. After centering the nozzle,
tighten the two machine screws.
31. Turn the proportional band adjustment knob to 5
percent DIRECT. Refer to figure 6-6 to locate the
locking nut on the adjustable set point pivot
assembly. Loosen the locking nut and back out the
set screw slightly so that the set point beam
assembly falls under its own weight when pivoted
upward. Also, maintain a minimum side play
between the adjustable set point pivot assembly and
the nozzle tubing assembly. Tighten the locking nut.
32. At the frame manifold (key 135), tighten the nut
that secures the tubing from the relay nozzle tubing
assembly (key 18). Apply full supply pressure with
the nozzle capped (to obtain maximum output
pressure) and check for leaks. Remove supply
pressure.
33. Install the set point beam bias spring (key 28)
into the frame bore and onto the spring seat on the
set point beam assembly, as shown in figure 6-3.
34. Attach link 3 to the set point beam shoe as
shown in figure 6-3.
Note
The following procedure (steps 35
through 41) adjusts link 4 so it will
always be in compression to eliminate
possible instability due to lost motion.
35. For controllers with reset and rate adjustments
(4195KB or 4195KC Series), remove the supply
pressure; then turn the reset adjustment to the
CLOSED (4195KB) or OFF (4195KC) position.
The controller output must be 0 bar (0 psig). To be
sure the controller output is 0 bar (0 psig), remove
supply pressure, set the reset adjustment to 0.01
minutes per repeat and wait 30 seconds; then, turn
the reset adjustment to the CLOSED (4195KB) or
OFF (4195KC) position.
36. Apply the correct supply pressure (refer to table
1-6) to the controller and provide an accurate means
of measuring the controller output pressure.
37. Adjust the proportional band to 5 percent
REVERSE and adjust the set point to the process
scale upper limit.
38. With link 1 disconnected, tape the process
pointer at the process scale lower limit. The output
pressure should be within 0.14 bar (2 psig) of the
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