How to judge (detect) whether the AC voltage range (ACV) of the multimeter is good?
Answer: Household detection sources include AC adapters, household sockets (two-phase 220V, it is best not to measure three-phase 380V, because this voltage is more dangerous, for the instrument (at least a multimeter with CAT III 600V) and Users have higher requirements). For safety reasons, it is recommended to measure relatively small voltages, such as AC adapters, and then measure the voltage of household sockets. For specific safe operation methods, please refer to the product manual.
