Instruction Manual
D200160X012
4195K Controllers
July 2018
32
4. The process pointer should indicate the process scale lower limit. If not, adjust the process pointer to the process
scale lower limit by loosening the zero adjustment locking screw and turning the zero adjustment screw. Tighten
the zero adjustment locking screw.
5. Apply process pressure equal to the process scale span upper limit.
6. The process pointer should indicate the process scale upper limit. If not, adjust the process pointer span screw to
correct one‐half the error as follows: clockwise to increase span for a low indication (below the upper limit);
counterclockwise to decrease span for a high indication (above the upper limit).
7. Repeat steps 3 through 6 until the error is eliminated.
8. Apply process pressure equal to the mid‐scale value on the process scale span. The process pointer should indicate
the mid‐scale mark,
±
2 percent of span. If the error is greater than
±
2 percent, refer to the Maintenance section and
perform the appropriate zero and span adjustment procedure for Bourdon tube or capsular element controllers.
9. Adjust the process pointer to within
±
1 percent of the mid‐scale mark by loosening the zero adjustment locking
screw and turning the zero adjustment screw. This distributes the error over the entire scale range and brings all
points within
±
1 percent of the process scale span.
10. Apply process pressure equal to the process scale lower limit.
11. The process pointer should indicate the process scale lower limit
±
1 percent of the scale span.
12. Apply process pressure equal to the process scale upper limit.
13. The process pointer should indicate the process scale upper limit
±
1 percent of the process scale span.
14. If the error is greater than
±
1 percent, repeat steps 3 through 13.
Remote Set Point (suffix letter M) Zero and Span Calibration
Refer to figures 4‐1 and 4‐3 for adjustment locations. Refer to figure 7‐1 for key number locations.
Note
Any adjustment of the remote set point span adjustment screw requires readjustment of the remote set point zero adjustment
screw.
1. Remove the two screws (key 6) and lift off the proportional band indicator cover (key 36).
2. Set the proportional band between DIRECT and REVERSE.
3. Apply remote set point pressure equal to the lower range limit.
4. The set point indicator should indicate the process scale lower limit. If not, loosen the remote set point zero
adjustment locking screw and adjust the remote set point zero adjustment screw until the set point indicator aligns
with the process scale lower limit. Tighten the zero adjustment locking screw.
5. Apply remote set point pressure equal to the upper range limit.
6. The set point indicator should indicate the process scale upper limit. If not, adjust the remote set point span
adjustment screw to correct one‐half the error as follows: clockwise to increase span for a low indication;
counterclockwise to decease span for a high indication.
7. Repeat steps 3 through 6 until the error is eliminated.
8. Adjust the remote set point pressure to the mid‐range value.
9. Make sure the set point indicator is within
±
1 percent of the mid‐scale mark, and if so, proceed to step 12. If the set
point indicator is not within 1 percent, but is within
±
2 percent of the mid‐scale mark, proceed with step 10. If the
set point indicator is not within
±
2 percent, proceed to the remote set point zero and span adjustment procedure in
the Maintenance section.
