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    * Question

    How to measure the quality of a diode


    Put the multimeter on the R×100 or R×1 block, connect the red pen to the end of the diode, the black pen to the other end, look at the position of the multimeter, record the resistance at this time, then adjust the diode, thenConnect with the two test leads of the multimeter and look at the resistance.Moreover, it can be seen that the one with the small resistance and the one connected to the black test pen is the positive pole of the diode; if the pointer swings particularly large during the two measurements, the diode is broken down, and if the resistance is particularly small, the diode is open.Then this is a fistula; if the forward resistance is measured between a few thousand ohms and several tens of kiloohms, it is a silicon tube.


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