What are the functions of clamp ammeter
A clamp ammeter combines an ammeter with a current transformer. When the wrench is tightened, the iron core of the current transformer can be opened, allowing the wire through which the measured current flows to pass. The measured circuit wire then transforms into the primary coil of the current transformer, where the current is then induced in the secondary coil current.
Typically, before attaching the ammeter for measurement when using an ordinary ammeter to measure current, the circuit must be turned off and stopped. This is quite problematic, and occasionally the motor's normal operation prevents it. Using a clamp ammeter, which can measure the current without shutting off the circuit, is currently much more practical.
The clamp meter can be changed to different ranges by changing the gear of the switch. But it is not allowed to operate with power on when shifting gears. The clamp meter is generally not high in accuracy, usually 2.5 to 5 grades. For the convenience of use, there are switches of different ranges in the meter for the function of measuring different levels of current and measuring voltage.
Clamp meters were originally used to measure alternating current. , but now the multimeter also has some functions, which can measure AC and DC voltage, current, capacitance, diode, triode, resistance, temperature, frequency and so on.
Inverter output AC current and photovoltaic DC current can both be measured with clamp ammeters. It is important to pay particular attention to the following: some clamp ammeters do not have DC functionality, the jaws must be tightly closed, and the range cannot be adjusted while the power is on.
