Instruction Manual
D200160X012
4195K Controllers
July 2018
70
24. Adjust the reset adjustment to 0.01 minutes per repeat. For a 4195KC controller, set the rate adjustment to OFF.
25. Increase the process pressure until the output pressure stabilizes at 0.2 bar (3 psig) for a 0.2 to 1.0 bar (3 to 15 psig)
output or 0.4 bar (6 psig) for a 0.4 to 2.0 bar (6 to 30 psig) output. Record the process pressure reading.
Note
When the reset valve is at 0.01, the controller is very sensitive to any process pressure change. Only small process pressure
changes may be necessary.
26. Very slowly increase the process pressure until the output pressure stabilizes at 1.0 bar (15 psig) for a 0.2 to 1.0 bar
(3 to 15 psig) output or 2.0 bar (30 psig) for a 0.4 to 2.0 bar (6 to 30 psig) output. Record the process pressure
reading.
±
1 percent of the process scale span, proceed with step 28. If the difference is less than
±
28. Loosen the proportional bellows screw (key 35).
(clockwise). If the reading recorded in step 26 is less than in step 25, adjust the gain screw (key 34) one‐half turn out
(counterclockwise).
30. Tighten the proportional bellows screw (key 35).
31. Repeat steps 25 through 30 until the difference is less than
±
1 percent of the process scale span.
32. If
±
1 percent of process scale span cannot be achieved by adjusting the gain screw (key 34), loosen the machine
33. Remove the supply pressure, the output measurement device, and the regulated process pressure source.
34. 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.
35. Perform the controller calibration procedures and, if necessary, the appropriate remote set point calibration
procedure in Section 3, 4, or 5.
36. Mount the controller as described in the Installation section.
37. Connect the external piping to the controller.
Replacing the Reset Restriction Valve (4195KB Controllers)
WARNING
Refer to the Maintenance WARNING on page 51.
Refer to the 4195KB controller portion of figure 7‐1 for key number locations.
procedure.
2. Remove the reset valve tubing assembly (key 42) from the reset restriction valve (key 54).
3. Remove the reset tubing assembly (key 43) from the reset restriction valve.