Extech Instruments MP530 Guide de l'utilisateur télécharger pdf (Page 7)

Capacitance, Diode test function

Default at

. Press SELECT button momentarily to select Diode test function.

CAUTION

Discharge capacitors before making any measurement. Large value capacitors should

be discharged through an appropriate resistance load.

Normal forward voltage drop (forward biased) for a good silicon diode is between

0.400V to 0.900V. A higher reading indicates a leaky diode (defective). A zero reading

indicates a shorted diode (defective). An OL indicates an open diode (defective).

Reverse the test leads connections (reverse biased) across the diode. The digital

display shows OL if the diode is good. Any other readings indicate the diode is resistive

or shorted (defective).

A A A

Forward Bias

Reverse Bias

Cap

Diode

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Extech Instruments MP530 Guide de l'utilisateur Page 7