Digital display meter is the abbreviation of digital display instrument. The commonly used display elements are LED and LCD. Digital display meters are widely used in all walks of life because of their intuitive vision, convenient setting and high degree of intelligent control. In addition, with the rapid development of current sensing technology, the functions and accuracy of digital display meters are constantly improving. Digital display meters are replacing traditional mechanical meters in large numbers.

Matters needing attention of digital display meter are as follows:

1. Before use, the instrument needs to be powered on for 15 minutes.

2, pay attention to prevent vibration and impact, do not use in places with excessive dust and harmful gases.

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

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

5. When it is not used for a long time, please electrify it every three months for at least 4 hours.

6, long-term storage should avoid direct light, should be stored in the ambient temperature-25 C ~ 55 C. 。

7. If there is no display on the instrument, 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 terminals are tightened.

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

10. The current terminal screws in the CT circuit must be tightened to ensure reliable contact between the inlet and outlet lines, so as to avoid failure.

11, if you want to check the instrument, the calibration instrument should be better than 0.1, to ensure the calibration accuracy.

The above are the precautions of digital display meters collected by Zhejiang Jinlai Electric Co., Ltd. If you still have any questions about the precautions of digital display meters, please call for advice.