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.

How to calibrate the input signal of the actuator?
华易科技电动阀 控制模块 接口示意图
华易科技电动执行器 LC控制模块 接口示意图

6 Simple Steps for Calibration:

  1. Turn the S-A switch to position 2.

  2. Press and hold the Set button until the L2 red LED lights up. (After releasing, L2 will start flashing.)

  3. 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.

  4. Apply a 4mA signal from the signal source, then press and hold Set and Shut simultaneously until L4 lights up, completing the 4mA calibration.

  5. Apply a 20mA signal from the signal source, then press and hold Set and Shut simultaneously until L4 lights up, completing the 20mA calibration.

  6. Finally, press and hold the Set button until L3 stops flashing and turns off, indicating that the module has exited calibration mode.