Resistance test method - measuring the rectifier bridge is good or bad

Under normal circumstances, the pressure and leakage require a professional pressure gauge to measure, and the current also needs to be measured by the chip factory's professional current testing equipment.

This section introduces you to use a multimeter to judge the quality of the rectifier bridge:

Method for judging the gear position of the resistor

This is a unidirectional conduction characteristic of the diode. It is tested that it has a resistance reading and a reverse-cutting non-reading value to judge whether it is good or bad. This method of judging is a very common one.

First, the multimeter hits the diode gear, the red pen is used to connect the positive pole, the black pen is connected to the negative pole, and the other end of the red test pen is connected to the AC end of the rectifier bridge. The other end of the black test pen is connected to the positive pole of the rectifier bridge. The test output is one inside the rectifier bridge. The forward resistance of the diode, as shown in the figure above, the measured diode resistance is about 14.1 kilo ohms, and the right picture shows, reverse connection, the red meter is connected to the positive pole of the rectifier bridge, and the black meter is connected to the AC terminal of the rectifier bridge. The measured value is digital. 1. Similarly, this number 1 indicates an open circuit or infinity. If the measurement is shown in the figure, it means that there is no problem with the measured diode. If the positive and negative connections are close or the same, the measured diode is damaged.

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