A multimeter to measure power
A table can shift through the switch, the scale change. But the switch is not allowed to operate when charged. Clamp meter general accuracy is not high, usually 2.5 ~ 5. In order to facilitate the use of the table there are different ranges of switching switches for measuring different levels of current and voltage measurement function.
Clamp meter (clamp meter), is a set of current transformer and current meter in one meter, is an important branch of digital multimeter, the measured current and current transformer and its working principle is the same. Clamp meter is composed of a current transformer and current meter assembly. The iron core of the current transformer can be opened when the wrench is tightened; the wire through which the current is measured can be cut through the opening of the iron core without cutting off, and when the wrench is released, the iron core is closed. Through the test circuit of the core, the wire becomes the primary coil of the current transformer, in which the current is induced in the two coil through the current. A current meter connected with the two coil is then instructed to measure the current of the line being measured.
If the measured current clamp meter, single-phase 220 volts, pure resistive load (electric heating type), according to the 4.5 count per kilowatt. Such as three-phase motor, inductive load can be calculated at 2 kilowatts per kilowatt.
The first is through the clamp meter is used to measure the AC current, but now the multimeter has some functions of it, can measure AC and DC voltage, current, capacitance, diode, transistor, resistor, temperature, frequency and so on.A table is for an electrical line measurement of the running current meter can measure the current in the energized condition. It is an electrical instrument specially designed for measuring AC current.
