Tenmars TM-86 User Manual page 23

Fig. 8: Using the instrument for Diode test
1.Selecting the position
2.Insert the test leads into the jacks, the red plug into
jack, and black plug into COM jack.
3.Connect the test leads to the diode under test
observing the proper polarities (see Fig. 8).
4.The threshold voltage value of direct polarization is
shown at display.
5.If the threshold voltage value is 0V the diode P-N
junction is shorted circuit.
6.If the message " O.L." is displayed the diode
terminals are reversed, the diode P-N junction is
damaged.
.
EN - 22
TM-86