HT instruments HT8100 - Manual (Page 17)

HT8100
EN - 16
4.4.6. Diode test
CAUTION
Before attempting any diode test, cut off power supply from the circuit to be
measured and make sure that all capacitors are discharged, if present.
Fig. 7: Use of the instrument for diode test
1. Select the

position
2. Press the MODE key to select the Diode Test. The symbol “ ” is shown on the display
3. Insert the red cable into input lead HzV

and the black cable into input lead COM.
4. Position the leads at the ends of the diode to be tested, respecting the indicated
polarity (see Fig. 7). The value of directly polarized threshold voltage is shown on the
display. For a good P-N junction, the instrument must show a value between 0.4 and
0.9V. If threshold value is equal to 0mV, the P-N junction of the diode is short-circuited.
5. If the instrument shows the message “OL”, the terminals of the diode are reversed with
respect to the indication given in Fig. 7 otherwise, the P-N junction of the diode is
damaged
6. For using the HOLD function see § 4.2.1, for measuring MAX/MIN/AVG values see
§ 4.3.1 and for saving the result see § 4.3.5