Sometimes, you have to open and close the clamp several times before measuring the current with a clamp meter.

Sometimes, it is necessary to open and close the clamp several times before measuring the current with a clamp meter. What is the purpose? " ? Eliminate residual magnetism. Before measuring the current with a clamp meter, it is necessary to open and close the clamp several times to eliminate the residual magnetism. The main function of reactive power compensation by compensation capacitor is to reduce apparent current, improve power factor, reduce loss and improve active power of electrical equipment. The generation of remanence is that once the ferromagnetic material and workpiece are magnetized, even after the external magnetic field is removed, a magnetic domain will still maintain a new orientation and will not return to the original random orientation state, so the material or workpiece will maintain remanence. The magnitude of remanence is related to the magnetic characteristics of the material, the strength of the applied magnetic field, the magnetization direction and the shape of the workpiece. Secondary remanence is a disturbing factor in paleomagnetism research. Because its magnetic stability is generally weaker than primary remanence, unstable components can be removed through certain treatment.