5Ka Series Proportional-Only Con- Trollers; Adjustments For 4195Ka Series Controllers; Manual Set Point Adjustment; Remote Set Point (Suffix Letter M) Adjustment - Fisher 4195 KB Series Instruction Manual

W6832 / IL
Section 3
4195KA Series Proportional-Only
Controllers
Adjustments for 4195KA Series
Controllers
This section includes descriptions of adjustments and
procedures for prestartup, startup, and calibration. Ad-
justment locations are shown in figures 3–1 and 3–3.
To better understand the adjustments and overall con-
troller operation, refer to the principle of operation sec-
tion and the schematic diagrams in figures 3–4 and
3–5. Unless otherwise noted, key numbers given in
this section are found in figure 5–24.

Manual Set Point Adjustment

Adjust the set point by moving the set point indicator
until the line on the set point indicator is over the de-
sired value on the process pressure scale. Move the
indicator to the right to increase the set point and to
the left to decrease it. Adjusting the set point does not
affect the proportional band setting.
If the controller is equipped with the optional internal or
external set point adjustment, turn the adjustment
Figure 3–1. 4195KA Series Controller Adjustment Locations
4195KA, KB, and KC Series
W3679 / IL
SET POINT
INDICATOR
PROCESS POINTER
PROPORTIONAL BAND
ADJUSTMENT
PROPORTIONAL BAND
INDICATOR COVER
OUTPUT PRESSURE
GAUGE
knob clockwise to increase the process set point and
counterclockwise to decrease the process set point.
Remote Set Point (suffix letter M)
Adjustment
Do not manually move the set point in-
dicator on controllers with remote set
point. Manually moving the set point in-
dicator could damage the controller.
If the controller is equipped with remote set point (suf-
fix letter M), vary the remote set point pressure to
change the set point. Increase the pressure to in-
crease 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.
METAL BALL
SWITCHING ZONE
INDICATOR
LOADER KNOB
AUTO/MANUAL
SWITCH
CAUTION
3–1