Power quality monitoring仪Key points for use:

1. Before use, the instrument needs to be powered on for 15 minutes; Pay attention to preventing vibration and impact, and do not use in areas with excessive dust and harmful gases; The input wire should not be too long. If the input end of the measured signal is too long, please try using twisted pair shielded wire; If the signal is accompanied by high-frequency interference, a low-frequency filter should be tried online.

2. Long term storage should avoid direct sunlight and should be stored at an ambient temperature of -25 ° C to 55 ° C; When stored for a long time without use, please power on every three months for no less than 4 hours; The current wiring terminal screws in the CT circuit must be tightened to ensure reliable contact between the incoming and outgoing lines to avoid faults; If there is no display on the instrument, the auxiliary power supply should be checked first to see if the voltage is within the range.

3. If the display is abnormal, check whether the input signal is normal and whether the signal terminals are tightened; If the instrument needs to be calibrated, the calibration instrument should be better than level 0.1 to ensure calibration accuracy; Unless the PT has sufficient power, the PT signal cannot be used as an auxiliary power source to ensure the normal operation of the instrument.