Calibration Procedure:
1. Apply 0% input signal (0% = 20 kPa, 3 psi, or 4 mA).
2. Wait for steady state. It is important to wait for steady state. On very large actuators, it can take minutes to
establish.
3. Loosen locking screw
A
about 1 turn, if it is looser, you risk introducing unwanted movement.
4. Adjust “ZERO” position using thumbwheel
B
5. Apply 100% input signal (100% = 100 kPa, 15 psi, or 20 mA).
6. Wait for steady state.
7. With a screw drive, adjust the “SPAN” setting by turning screw
C,
while doing so, keep the zero screw
B
in
position by applying pressure with your thumb.
8. Lock the calibration mechanism in place by tightening locking screw
A
9. Apply 0% signal and verify zero position.
Cam Installation:
Introduction: T
he standard cam (labeled “K1” features linear, 90 degree operation for full 3-15 psi input, 3-9 and 9-15 psi
split ranges, and 3-15 psi 180 degree operation. The factory setting is 3-15 psi, 90 degrees, with “D: (direct) side up for full
clockwise position at 3 psi for 90 degree operation.
Caution:
Be sure supply air pressure is removed and no pressure exists in the actuator before adjusting cam
.
