Troubleshooting methods for electric energy meter field calibrator


Various faults may also occur when the electric energy meter field calibrator is used. Today we will summarize the troubleshooting methods for the electric energy meter calibrator during measurement.

1. When measuring parameters, if the displayed value is very different from the actual value, you should check whether the input voltage and current range are consistent with the actual value.

2. When measuring parameters, if the displayed reading is unstable, you should check whether there is voltage input. In the absence of voltage input, the displayed reading will be unstable when measuring current. When there is voltage input, if the displayed reading is unstable, it means the load is unstable.

3. When calibrating the meter, if the error value is very large, there are several possible reasons:

A. The wiring is wrong, the phase voltage and phase current do not correspond one to one, or the power of a certain phase is negative.

  B. The photoelectric sampler incorrectly samples (ie, oversamples or undersamples). At this time, the position or sensitivity of the photoelectric sampler needs to be readjusted.

C. The current input mode setting is incorrect or the three-phase three-wire or three-phase four-wire mode is incorrect.

D. The sampling current caused by the dirty core end face of the clamp-type current transformer is too small.

E. The core end face of the clamp-type current transformer is not completely closed.

F. The electric meter constant to be calibrated is entered incorrectly.

G. The variable ratio of the calibrated measuring device is entered incorrectly.

H. The on-site load fluctuates too much, or there is strong electromagnetic interference.



For more information on how to use the calibrator and troubleshooting methods, pay attention to Huaguang Electronic Instruments!



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