Instruction Manual
D200160X012
4195K Controllers
July 2018
27
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.
D
For reverse control action—
An increasing sensed vacuum decreases output pressure.
After changing the action, tighten the screws on the proportional band indicator cover.
Reset Adjustment
To adjust reset, open the controller cover and
locate the RESET adjustment. Rotate the adjustment clockwise to
decrease the minutes per repeat or counterclockwise to increase the minutes per repeat. Increasing the minutes per
repeat provides a slower reset action.
Rate Adjustment
To adjust rate, open the controller cover and locate the RATE adjustment. Rotate the adjustment clockwise to
decrease the minutes (less rate action) or counterclockwise to increase the minutes (more rate action).
Anti‐Reset Windup (suffix letter F) Adjustment
If the arrow on the relief valve points toward the bottom of the controller case, as shown in figure 4‐1, the valve opens
with increasing controller output pressure. If the arrow points in the opposite direction, the relief valve opens with
decreasing controller output pressure. Differential relief pressure is factory set at 0.3 bar (5 psig). Maximum relief
pressure is 0.5 bar (7 psig). The minimum is 0.1 bar (2 psig).
Turn the adjusting screw counterclockwise to increase differential relief pressure, clockwise to decrease it.
Switching the Auto/Manual Station (suffix letter E)
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.
Refer to figure 4‐1 if the controller has the auto/manual station (suffix letter E). To switch from automatic to manual
mode, or from manual to automatic, you must first balance the manual output with the controller output. Two
balance methods are available to equalize the manual output with the controller output.
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. Then move the automatic/manual switch to MANUAL. Turn the loader knob clockwise
to increase the controller output or counterclockwise to decrease it.
