Instruction Manual
D200160X012
4195K Controllers
July 2018
16
Remote Set Point (suffix letter M) Adjustment
CAUTION
Do not manually move the set point indicator on controllers with remote set point. Manually moving the set point indicator
could damage the controller.
If the controller is equipped with remote set point (suffix letter M), vary the remote set point pressure to change the
set point. Increase the pressure to increase the set point, and decrease the pressure to decrease the set point.
Proportional Band Adjustment (PB ADJ)
The proportional band determines the controller output sensitivity. The proportional band adjustment is marked in
percentages of process pressure required to drive the controller from zero output to full output.
To adjust the proportional band, open the controller cover and locate the proportional band adjustment (PB ADJ)
knob. Rotate the knob until the desired value is opposite the line on the proportional band indicator cover.
Changing Controller Action
To change the controller action from direct to reverse or vice versa, loosen the screws on the proportional band
indicator cover. Lift the cover out as shown in figure 3‐2 and rotate the proportional band adjustment to the desired
action. Setting the proportional band to the values in the white portion of the adjustment provides direct controller
action; setting proportional band in the black portion provides reverse controller action.
Figure 3‐2. Changing Controller Action on Fisher 4195KA Controllers
W3439
Bourdon Tube or Capsular Element Controllers for Positive or Compound Pressure
D
For direct control action—
An increasing sensed pressure increases output pressure.
D
For reverse control action—
An increasing sensed pressure decreases output pressure.
Capsular Element Controllers for Vacuum Pressure
D
For direct control action—
An increasing sensed vacuum increases output pressure.
