Diode Test - Tenmars TM-87 User Manual

4.3.6. Diode test

Before taking diode test on remove power from the circuit being tested and
discharge all capacitors.
1. Selecting the position
2. Insert the test leads into the jacks, the red plug into
into COM jack.
3. Connect the test leads to the diode under test observing the proper polarities (see Fig. 7).
The threshold voltage value of direct polarization is shown at display. The meter
displays the diode voltage to approximately 0.4 ~ 0.9V for good junction.
4. If the threshold voltage value is 0V the diode P-N junction is shorted circuit.
5. If the message "
junction is damaged.
6. For HOLD function, Minimum and Maximum value measurement and Relative measure
please refer to paragraph 4.2.
Fig. 7: Using the instrument for Diode test
.
O.L.
" is displayed the diode terminals are reversed or the diode P-N
CAUTION
HzVΩµA jack, and black plug
14
TM-87/TM-88