Diode Testing; Use As A Non-Contact Voltage Detector - Martindale Electric ET5 Instruction Manual

3.23 Diode Testing

If the diode to be tested is in circuit be sure the circuit power is
switched off.
COM
Connect the black test lead to the terminal and the red test
+
lead to the terminal.
Set the rotary switch to the position.
Press the SEL button twice to select the diode test function. The
LCD will display .
Taking all necessary safety precautions connect the test leads to
the diode being tested.
If the diode is good a forward bias will give a display reading of
around 0.6V (silicon diode) and a reverse bias will give a display of
OL. If the diode is shorted or open circuit the display will indicate
approx. 0V or OL respectively for both forward and reverse bias.

3.24 Use as a Non-contact Voltage Detector

Warning
Non-contact voltage detector testing is not suitable to determine if
a circuit is not hazardous live. A double pole contact voltage test
should always be used for that purpose.
Before and after each use, the non-contact voltage detector function
must be proven using a known good voltage source. Do not use if
the unit fails to operate correctly during proving.
Set the rotary switch to the NCV position. The LCD will display EF.
Position the fork tip marked S toward the conductor to be tested for
the presence of a live voltage.
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