Instruction Manual
D200160X012
4195K Controllers
July 2018
46
1. Refer to figures 5‐1 and 5‐2 for location of adjustments.
2. Remove the two screws (key 6) and lift off the proportional band indicator cover (key 36).
3. Set the proportional band between DIRECT and REVERSE.
4. Adjust the process pressure to the low limit of the input range.
5. Adjust the process pointer to the lowest limit of the input scale by loosening the zero adjustment locking screw and
turning the zero adjustment screw.
6. Adjust the process pressure to the upper limit of the input span. Note whether the pointer indication is above or
below the upper limit of the process scale.
7. Adjust the span screw as follows: Clockwise to increase span for a low indication; counterclockwise to decrease span
for a high indication. Adjust the span screw to correct one‐half the error.
8. Repeat steps 4 through 7 until the error is eliminated.
9. Install the proportional band indicator cover (key 36), and tighten the two screws (key 6).
Figure 5‐2. Fisher 4195KS Controller Parts and Adjustments Locations (Remote Set Point Option)
PIVOT
ASSEMBLY A
GUIDE
FLEXURE
MOUNTING
SCREW
LINK A
ADJUSTMENT
SCREW
LINK B
LINEARITY
ADJUST
MENT
PIVOT ASSEMBLY B
MOUNTING
SCREW
TIE BAR
REMOTE SET POINT ZERO ADJUSTMENT SCREW
ZERO ADJUSTMENT LOCKING SCREW
CAPSULES
UPPER TRAVEL
STOP
LOWER TRAVEL
STOP
DRIVE FLEXURE
SIDE VIEW
FRONT VIEW
36A9751‐C
B1668‐4
Setting Switching Points
Direct‐Acting Controllers
The controller output signal will switch from zero pressure to full supply pressure when increasing process pressure
passes the upper switching point.