How-test-a-zener-diode

The zener diode characteristics shows under the reverse bias condition, the voltage across the diode remains almost constant although the current through the diode increases in the region p-n. So the voltage across the
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Zener Diode: 6.2v To 200V Regulator PDF Details:
zener diode serves as a reference voltage. Hence the diode can be used as a voltage regulator.

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ZENER DIODE-With Digital multimeter
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How test Zener Diode with Digital Multimeter?
Step-1.
      Connect DMM (+) Test Red lead to anode
                       DMM (-)  Test Black lead to cathode
Verification: DMM Reading shows = 0.548v to 0.668v  = GOOD condition.
Step-2.
Reverse bias:
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 Connect DMM (+) Test lead to cathode
                   DMM   (-) Test lead to anode
                   DMM Reading shows = OL  or  OPEN or ‘1’ (over load) = GOOD condition.
Verification:  If you get reading in forward bias as 0000 or OL  or 1, in reverse bias as 0000 (or) low values the device can be FAULTY and needs replacement.
Comments(4)
  1. Nakul November 10, 2013
  2. Ruthie March 5, 2014
    • Keerthi March 5, 2014
  3. momin sarkar July 31, 2015

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