Electricity meter in the factory, maintenance, the need to carry out performance test, so the need to use the electricity meter field calibrator, the equipment in the process of use, often encounter a variety of failures, this article will give you a simple introduction to the electricity meter field calibrator common faults how to deal with.

1. During parameter measurement, the displayed value differs greatly from the actual value, so check whether the access voltage and current range are consistent with the actual value.

2, when measuring parameters, the display reading is not stable, should check the voltage input, in the absence of voltage input when measuring the current display reading will be unstable. In the case of voltage input, an unstable reading is load instability.

3. In the calibration process, if the error is very large, there may be the following reasons

4, wiring error, phase voltage and phase current are not corresponding, or phase power is negative.

5, when the photoelectric sampler missampling (that is, more or less samples), need to readjust the photoelectric sampler position or sensitivity.

6, the current input mode is not set correctly or three-phase three wire, three-phase four wire is not correct.

7, resulting in small end face dirty sampling current clamp current transformer core.

8. The iron core end face of the clamp type current transformer is not completely closed.

Ammeter constant input is incorrect.

10. Calibrate the variable ratio input error of the metering device.

11, the load of the field changes too much, or strong electromagnetic interference.

12, the low frequency output signal output and the low frequency constant of the standard electricity meter can be verified by the photoelectric pulse signal input on the calibration panel and the Pinend and GND terminals of the high and low frequency signal output. The error value read by the calibration method from the calibrator is equal to the absolute value of the actual error value of the calibrator, but the sign is opposite.