HT instruments HT39 - Manual (Page 17)

HT37 - HT39
EN - 16
4.3.7. Diode test and continuity test
CAUTION
Before taking resistance measurements in circuit remove power from the
circuit being tested and discharge all capacitors.
Fig. 9: Diode test and test continuity
1. Turn the selector on
/
.
2. Insert the test leads into the jacks, the red plug into HzV
ΩµA jack and the black plug
into COM jack (Fig. 9).
3. Connect the red lead to the positive side (anode) of the diode and the black lead to the
negative side (cathode). The meter displays the diode voltage to approximately 0.4 ~
0.9V for good junction.
4. Reverse the connections and measure the voltage across the diode again. The
message “OL" on the display corresponds to a correct junction.
5. The continuity test is always active and the test is performed using the test leads in the
same way of resistance measurement (refer to paragraph 4.3.6). The buzzer is on for
resistance values <450
Ω.
6. For minimum and maximum value measurement, HOLD and Relative
∆REL functions
please refer to paragraph 4.2.