1. The instrument shall be powered on for 15 minutes before use.

2. Pay attention to prevent vibration and impact, and do not use it in places with excessive dust and harmful gas.

3. The input wire should not be too long. If the measured signal input end is too long, please try the twisted pair shielded wire.

4. If the signal is accompanied by high-frequency interference, try the low-frequency filter online.

5. If it is not used for a long time, please power on it for at least 4 hours every three months.

6. Long-term storage should avoid direct light, and should be stored at ambient temperature of - 25 ° C~55 ° C

7. If the instrument does not display, check whether the auxiliary power supply and voltage are within the range.

8. If the display is abnormal, check whether the input signal is normal and whether the signal terminal is tightened.

9. Unless PT has sufficient power, PT signal cannot be used as auxiliary power at the same time to ensure normal operation of the instrument.

10. The current terminal screws in the CT circuit must be tightened to ensure reliable contact between the incoming and outgoing lines to avoid faults.

11. If the instrument is to be calibrated, the calibration instrument should be better than 0.1 to ensure the calibration accuracy.