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Instruction Manual
D200160X012
4195K Controllers
July 2018
67
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 controllers), 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.
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 supply pressure. If not, adjust flapper leveling screw 1 (the screw nearest the nozzle)
until the output is within 0.14 bar (2 psig) of supply pressure.
(key 31), allowing the link to find its free length.
40. Tighten the two adjusting screws on link 4.
41. Lift link 4 out of the hole in the bellows bracket (key 31) and ensure it drops back into the hole under its own weight.
If not, repeat steps 39 and 40.
42. Adjust the proportional band to 40 percent REVERSE or DIRECT depending on the desired controller action.
43. Adjust the set point to the process scale lower limit.
44. Tape the process pointer at the process scale lower limit. The output pressure may be anywhere between 0.2 to 1.0
bar (3 and 15 psig) for a 0.2 to 1.0 bar (3 to 15 psig) output signal range or between 0.4 to 2.0 bar (6 and 30 psig) for
a 0.4 to 2.0 bar (6 to 30 psig) output signal range. If the output is not within the specified range, adjust the flapper
leveling screw nearest the nozzle until the output is within the range specified. Record the controller output
pressure.
45. Adjust the set point to the process scale upper limit.
46. Remove the tape and move the process pointer until the controller output equals the pressure recorded in step 44.
Note the process pressure indication.
47. The process pressure indication should be within
±
2 percent of the process scale upper limit.
If the process pressure indication in step 46 is greater than the process scale upper limit by 2 percent, loosen the
shoe adjustment screws (key 30), shown in figure 6‐3, and move the set point beam shoe (key 29) slightly away
from the center of the flapper assembly.
If the process pressure indication in step 46 is less than the process scale upper limit by 2 percent, loosen the shoe
adjustment screws (key 30), shown in figure 6‐3, and move the set point beam shoe (key 29) slightly toward the
center of the flapper assembly.
limit.
49. Remove the tape from the process pointer and reconnect link 1 to the input element. If the controller has a capsular
input element, be sure to reconnect link 1 in the same hole noted in step 21.
50. 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.