Selection points of clamp-on ammeter
Clamp ammeter is also called clamp meter, more commonly known as hook meter in Taiwan. Clamp ammeter is clamped to the wire, in the state of not cutting off the circuit, detecting the current of the convenient test instrument (also known as non-destructive measurement). Analog pointer multimeter and digital multimeter is to cut off the circuit to detect the current, humidity sensor probe, regulator, pt100 RTD sensor, all-copper solenoid valves, cast aluminum heater, heating coil and clamp ammeter is only clamped on the outer skin of the energized wire, you can detect the current. Simple operation, do not need to connect directly to the circuit can also detect high current.
Clamp meter, multimeter and insulation resistance meter are analog refers to the multimeter and clamp meter detection method needle and digital two: standard detection range: AC, DC are in 2A to 200A or 400A or so, but also can be detected up to 2000A high-current products; another can be detected in a few mA of the tiny current leakage detection products as well as the detection of transformer power supply, switching converter power supply sinusoidal waveforms. There are also products that can detect small currents of several mA, leakage detection products, transformer power supply, switching power supply and other non-sinusoidal waveforms.
Clamp ammeter, the 4 points of the choice of machine type?
1: Detection object
According to the different detection object, AC current, DC current, or leakage current to choose the type of machine.
2: Maximum conductor size
There are different sizes from 21mm diameter to 53mm diameter to fit the testing place.
3: Whether true value detection is necessary
Clamp ammeters using the average value method cannot correctly detect non-sinusoidal circuits such as motors and transformer circuits. To detect such circuits, a true RMS clamp ammeter should be used.
4: Other Functions
Clamp ammeters are not only able to detect current, but also have the function of detecting and recording output.
