Instruction Manual
D200160X012
4195K Controllers
July 2018
44
The white portion of the adjustment enables direct controller action; the black portion enables reverse controller
action.
Auto/Manual Switching (Option E)
Refer to figure 5‐5 if the controller has the auto/manual option. Two balance methods are available to equalize the
manual output with the controller pressure. To switch from automatic to manual mode, carefully adjust the loader
knob until the metal ball inside the plastic tube moves into the switching zone. The move the automatic/manual
switch to MANUAL. Turn the loader knob clockwise to increase the controller output or counter clockwise to decrease
it. To switch from manual to automatic mode, adjust the set point manually or with remote set point pressure to move
the ball into the switching zone. Turn the switch to AUTOMATIC, and adjust the set point manually or with the remote
set point pressure to control the output.
When the automatic/manual switch is in AUTOMATIC, adjusting the loader knob has no effect on the controller
output. When the automatic/manual switch is in MANUAL, changing the set point adjustment has no effect on the
controller output.
Note
Switching the controller between automatic and manual, or manual and automatic mode, without balancing the outputs, can
disturb the process and cause controller cycling.
Prestartup Checks for 4195KS Controllers
When performing the checks, open loop conditions must exist. Refer to figure 5‐1 for location of adjustments.
Note
If the controller has the auto/manual option (option E), be sure the controller is in the automatic mode prior to performing
prestartup checks.
1. Connect supply pressure to the supply pressure regulator, and be sure it is delivering the proper supply pressure to
the controller. Provide a means of measuring the controller output pressure.
2. For controllers with remote set point (option M), connect regulated pressure of 0.2 to 1.0 bar (3 to 15 psig) or 0.4 to
2.1 bar (6 to 30 psig) to the remote set point connection at the top of the controller case.
3. Loosen two screws (key 6), lift off the proportional band cover (key 36), and set the proportional band knob
between DIRECT and REVERSE.
4. The process indicator should indicate the process pressure. For example, with the process pressure at 50 percent of
the input span, the process pointer should be 50 percent (+/‐1 percent) of its span. Slight adjustment of the
indicator zero screw may be necessary. See figure 5‐1 for zero adjustment and locking screw location.
5. If desired, the accuracy can be verified at other points on the scale. If the indicator appears to be out of calibration,
refer to the process zero and span adjustment portion of the calibration procedure.
6. Install the proportional band cover and install two screws (key 6).
Startup for 4195KS Controllers
It is recommended that the controller switching points be set as described in the calibration procedures.
