Zener Diode Test Procedure. Put S1 in ON position; Identify the test leads and connect the ZD to its proper terminals; Push S2 and read the DVM. If the readout is > 30V probably the ZD under test (ZUT ...

The open circuit voltage tells you immediately, if this function can be used for testing higher voltage drop devices such as LEDs which require as much as 3V to turn on. Also, this DC voltage can be ...