What is the detection method of rectifier diode? — SUNMATE

First, remove all the rectifier diodes in the rectifier × R or 1000 × R ohm gear, measure the two outgoing lines of the rectifier diode (head and tail are exchanged and measured once respectively).

If the difference between the two measured resistance values is large, for example, the large resistance value is up to several hundred thousand Ω, while the small resistance value is only a few hundred Ω or even smaller, it indicates that the diode is good (except for the diode with soft breakdown).

If the resistance values measured twice are almost equal and the resistance values are very small, it means that the diode has been damaged by breakdown and cannot be used.