Summary of the key points of using clamp ammeter
Clamp meter (clamp meter) is an instrument that combines current transformer and ammeter, and is an important branch of digital multimeter. Its working principle is the same as that of current transformer for 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.
The clamp gauge can be changed to different ranges by shifting the switch. But it is not allowed to operate with electricity when shifting gears. Clamp gauges generally have low accuracy, typically ranging from 2.5 to 5 levels. For ease of use, there are also conversion switches with different ranges inside the meter for measuring different levels of current and voltage.
The clamp meter was originally used to measure AC current, but now it also has the functions of a multimeter, which can measure AC/DC voltage, current, capacitance, diode, transistor, resistance, temperature, frequency, and so on.
A clamp meter is an instrument used to measure the current of a running electrical circuit, which can measure the current without interruption. It is an electrical instrument specialized in measuring high AC currents.
Clamp current meter, also known as clamp meter, is more commonly referred to as hook meter in Taiwan.
Clamp on ammeter is a convenient testing instrument (also known as non-destructive measurement) that clamps wires and detects current without cutting off the circuit
Analog pointer multimeters and digital multimeters detect current by cutting off the circuit, while clamp ammeters only clamp on the outer skin of the energized wire to detect current. The operation is simple and can safely detect high currents without directly connecting the circuit
Clamp on meters, multimeters, and insulation resistance meters all have two types: analog pointer and digital
Standard testing range: AC and DC are both around 2A to 200A or 400A, and there are also products that can detect high currents of 2000A;
There are also leakage detection products that can detect small currents of several mA, as well as products that can detect the true RMS of non sinusoidal waves other than sine waves such as transformer power supplies and switch conversion power supplies
