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IRONMETER
EN - 10
4.3.4. Diode
test
CAUTION
Before attempting any resistance measurement, cut off power supply from
the circuit to be measured and make sure that all capacitors are discharged,
if present.
Fig. 6: Use of the instrument for diode test
1. Select position
CAP.
2. Press the MODE/
key to select
“
”
measurement.
3. Insert the red cable into input terminal VHz%m
ACAP
and the black cable into
input terminal COM.
4. Position the leads at the ends of the diode to be tested (see Fig. 6), respecting the
indicated polarity.
5. The value of directly polarized threshold voltage, given in mV, is shown on the display.
6. If threshold value is equal to 0mV, the P-N junction of the diode is short-circuited.
7. If the display shows the message "O.L", the terminals of the diode are reversed with
respect to the indication given in Fig. 6 or the P-N junction of the diode is damaged
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