For AC power, the highest reverse operating voltage is the peak AC voltage that the diode is subjected to due to continuous changes. The bidirectional trigger diode places the multimeter in the corresponding DC voltage range. The test voltage is provided by a megohmmeter. During testing, shake the megohmmeter and use the same method to measure the VBR value. Finally, compare VBO with VBR, and the smaller the absolute difference between the two, the better the symmetry of the tested bidirectional trigger diode. Transient Voltage Suppression Diode (TVS) uses a multimeter to measure the quality of the tube. For single pole TVS, the forward and reverse resistance can be measured using the method of measuring ordinary diodes. Generally, the forward resistance is about 4k Ω, and the reverse resistance is infinite. For bipolar TVS, the resistance value between the two pins measured by exchanging red and black probes should be infinite. Otherwise, it indicates poor performance or damage to the tube
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