How to use multi-purpose clamp meter and safety precautions
Clamp current meter, abbreviated as clamp current meter, is a specialized instrument for measuring AC current. To measure AC current with a clamp meter, simply place the measured wire in the clamp window of the clamp meter, and the value of the current in the wire can be measured without connecting the clamp meter to the circuit. The early produced clamp meters only had the function of measuring AC current, while the recently produced clamp meters have been combined together to form a multi-purpose clamp meter.
The usage method and safety precautions of the multi-purpose clamp gauge:
(1) When using a clamp meter, the size of the measured current should be estimated first and the appropriate range should be selected. Generally, a larger range should be selected first, and then adjusted to the appropriate range depending on the magnitude of the measured current.
(2) To ensure the correct reading of the clamp gauge, after the wire is clamped into the clamp, the two sides of the clamp iron core should match well.
(3) The jaws of a clamp meter can only hold one wire, and if two wires are clamped in, the current in the wires cannot be measured.
(4) After each measurement of the clamp meter, the range conversion switch should be placed in the maximum range position to prevent others from using the instrument without selecting the range and damaging it.
Clamp meter is an instrument that combines current and ammeter, and is an important branch of digital technology. Its working principle is the same as measuring current. A clamp meter is a combination of a current transformer and an ammeter. The iron core of the current transformer can be opened when the wrench is tightened; The wire through which the measured current passes can pass through the open gap of the iron core without cutting, and the iron core will close when the wrench is released. The tested circuit wire passing through the iron core becomes the primary coil of the current transformer, and current is induced in the secondary coil through the current. So that the ammeter connected to the secondary coil can indicate the current of the tested circuit.
