Why not use the multimeter ohmmeter to measure the insulation resistance of electrical equipment?
This should be a professional pressure test equipment, the insulation material applied voltage, detection of leakage current of materials, insulation insulation is indirectly obtained. Different requirements of different materials, this is the international standards, European and American standards
Because the power supply voltage of the multimeter is low, the insulation resistance when the voltage is low can not reflect the real value of the high voltage, so it cannot be measured by ohmmeter or ohm gear.
The insulation resistance is too large, the ohmmeter depends on the internal resistance, and the internal resistance is not so great. The accuracy is not allowed
