Precautions before use:

1. Please read this manual carefully before use and save it for reference

2. In order to make the measurement more accurate, the instrument must be calibrated regularly in conjunction with the electrodes

3. Incorrect wiring can cause instrument malfunction or damage. Please read the operating instructions carefully before installing it yourself

4. Do not short-circuit the positive and negative signal lines of the electrode, otherwise it will seriously damage the electrode

5. The contact capacity of the internal control relay of the instrument is 3A, 220/250VAC. Please pay attention to protection.

6. The installation site of the controller must be well ventilated, avoiding rain and direct sunlight