When the actuator’s valve position does not match the 4–20mA input signal (resulting in a discrepancy between the feedback signal and the input signal), you can calibrate the input signal to eliminate this deviation. 6 Simple Steps for Calibration: Turn the S-A switch to position 2. Press and hold the Set button until the L2 red LED lights up. (After releasing, L2 will start flashing.) Within 5 seconds, press and hold both the Open and Shut buttons simultaneously. L2 flashing will switch to L3 flashing, indicating that the control module has entered input signal calibration mode. Apply a 4mA signal from the signal source, then press and hold Set and Shut simultaneously until L4 lights up, completing the 4mA calibration. Apply a 20mA signal from the signal source, then press and hold Set and Shut simultaneously until L4 lights up, completing the 20mA calibration. Finally, press and hold the Set

1. Mechanical Installation 1. Mechanical Installation Refer to the “How to Install the Actuator onto the Valve” section to correctly install the actuator onto the valve and manually operate it to confirm proper functioning. Follow the guidelines in “How to Set the ON-OFF Electric Valve” to properly adjust the actuator’s electrical limits (close limit CLS and open limit OLS) and mechanical limits. Important Notes: Unless specified otherwise, the actuator’s stroke angle between the fully closed and fully open positions is typically 90° during factory debugging. The output current corresponds to 4mA when fully closed and 20mA when fully open. The position potentiometer has been calibrated during the valve matching process, accounting for potential position changes at full open and full close, so users should generally avoid adjusting the potentiometer and its gears. Follow the wiring diagram below for correct terminal connections. 2. Position Transmitter Panel Explanation Adjustable Potentiometers: “Full Position”

1. Installing the Actuator onto the Valve Follow the installation instructions in “How to Install the Actuator onto the Valve” to correctly install the actuator on the valve. Confirm normal operation by manually testing the valve movement. 2. Adjusting the Mechanical Limits for Fully Closed Position Use the handwheel to move the valve to the fully closed position. Ensure the mechanical limit stop does not touch the adjustment screw or housing. Loosen the scale plate locking screw, adjust the scale plate so that the pointer aligns with the 0 degree mark (SHUT position), and then tighten the locking screw. 3. Adjusting the Mechanical Limits for Fully Open Position Use the handwheel to move the valve to the fully open position. Ensure the mechanical limit stop does not touch the adjustment screw or housing. If the valve’s stroke is 90°, the pointer should align with the 0 degree mark (OPEN position)