How to use and precautions for electrician measurement clamp meter
Clamp on ammeter is divided into high and low voltage types, used to directly measure the current in the circuit without disconnecting the line.
The usage method is as follows:
(1) When using a high-voltage clamp meter, attention should be paid to the voltage level of the clamp ammeter, and it is strictly prohibited to use a low-voltage clamp meter to measure the current of the high-voltage circuit. When measuring with a high-voltage clamp meter, it should be operated by two people. Non duty personnel should also fill out a second type of work order for measurement. When measuring, they should wear insulated gloves, stand on an insulated pad, and not touch other equipment to prevent short circuits or grounding.
(2) When observing the timing of the watch, special attention should be paid to maintaining a safe distance between the head and the charged part. The distance between any part of the human body and the charged body should not be less than the entire length of the clamp shaped watch.
(3) When measuring on a high-voltage circuit, it is forbidden to use wires to connect a clamp ammeter to another meter for measurement. When measuring the current of each phase of high-voltage cables, the distance between cable heads should be at least 300mm, and the insulation should be good. The measurement can only be carried out when it is deemed convenient.
(4) When measuring the current of low-voltage fuses or horizontally arranged low-voltage busbars, the fuses or busbars of each phase should be protected and isolated with insulating materials before measurement to prevent phase to phase short circuits.
(5) When a cable is grounded, measurement is strictly prohibited. Prevent the occurrence of ground breakdown and explosion due to low insulation level of cable heads, which may endanger personal safety.
(6) After the measurement of the clamp ammeter is completed, turn the switch to the Z range to avoid accidental overcurrent during the next use; And it should be stored indoors in a dry place.
