How to Measure Voltage with a Clamp Meter
A clamp meter is an instrument used to measure the current of a running electrical circuit, which can measure the current without interruption. A clamp meter is actually a current transformer, and the stuck wire is equivalent to the primary coil of the transformer. When there is current in the wire, magnetic flux is generated in the iron core of the meter, and then current is induced in the secondary coil of the meter. This current is equal to the current in the primary coil multiplied by the number of turns in the primary coil (which is one wire, so it is one turn) divided by the number of turns in the secondary coil. Based on this relationship, the current in the wire can be converted.
A clamp ammeter is actually an electromagnetic sensor that generates a magnetic field through an electrified wire. The magnitude of the current produces a different magnetic field strength, and the current value converted on the clamp ammeter varies. Due to the difference in three-phase voltage, the current holes on each phase are different, so it can only measure single-phase current, and then calculate the average current. Finally, whether it is a three-phase 380V voltage or a two-phase 220V voltage, the method used is the same.
The clamp ring of a clamp multimeter is designed to measure current, but since a clamp multimeter is called, it has more than just the function of measuring AC current.
Many clamp meters have functions such as measuring resistance, AC/DC voltage, etc. Simply put, the functions on a regular multimeter can be achieved on a clamp multimeter. Many pliers have the function of measuring DC current, but currently most of them use probes instead of pliers rings.
Adjust to the current mode and simply clamp the wire that needs to measure the current with a caliper.
Some clamp gauges can measure voltage, while others cannot. Those that can measure voltage are equipped with probes. Insert the probes into the corresponding holes, adjust them to the voltage level, and put two probes on the voltage points to be measured, such as a live wire and a neutral wire.
