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Elma 805/807 Page 50
DIODE TEST, CAPACITANCE FUNCTIONS
Defaults at Ω. Press SELECT button momentarily 2 times to select Diode test
function. Normal forward voltage drop (forward biased) for a good silicon diode is
between 0.400V to 0.900V. A reading higher than that 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).
Defaults at Ω. Press SELECT button momentarily 3 times to select
Capacitance function. Relative zero
mode can be used to zero out the parasitic
capacitance of the leads and the internal protection circuitry of the meter when
measuring low capacitance in the order of Pico Farad (pF).
CAUTION
Discharge capacitors before making any measurement. Large value capacitors
should be discharged through an appropriate resistance load
50


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