How to Use a DC Clamp Meter
A DC clamp meter is an instrument used to measure the current of a running electrical circuit, which can measure the current without interruption.
Structure and principle of DC clamp meter
A clamp gauge is essentially composed of a current transformer, a clamp wrench, and a rectifying magneto electric system reactive force instrument.
Usage of DC clamp meter
(1) Mechanical zeroing is required before measurement
(2) Choose the appropriate range, first choose the large range, then choose the small range or estimate based on the nameplate value.
(3) When measuring with the minimum range and the reading is not yet clear, the tested wire can be wound a few times. The number of turns should be based on the number of turns in the center of the clamp, and the reading=indicated value x range/full deviation x turns
(4) When measuring, the measured wire should be placed in the center of the clamp and the clamp should be tightly closed to reduce errors.
(5) After the measurement is completed, the conversion switch should be placed at the most appropriate range.
Precautions for DC clamp meter
(1) The voltage of the tested circuit should be lower than the rated voltage of the clamp meter.
(2) When measuring the current of high-voltage lines, it is necessary to wear insulated gloves, insulated shoes, and stand on insulated pads.
(3) The jaws should be tightly closed and the range cannot be changed with electricity.
