Continuity Test And Diode Test - HT Instruments HT25N User Manual

5.5.

CONTINUITY TEST AND DIODE TEST

Before taking resistance measurements on the circuit remove power from
the circuit being tested and discharge all capacitors.
Fig. 6: Using the instrument for Continuity test and Diode test
1. Selecting the position
2. Insert the test leads into the jacks, the red plug into VmAA
into COM jack
Continuity test
3. Connect the test leads to the circuit under test (see Fig. 6 – left part)
4. The resistance value (just indicative) is displayed and the instrument emits a sound
signal if the resistance value results to be <60
Diode test
5. Connect the test leads to the diode under test observing the proper polarities (see Fig. 6 –
right part)
6. The threshold voltage value of direct polarization, expressed in mV is shown at display
7. If the threshold voltage value is 0V the diode P-N junction is shorted circuit
8. If the message "OL" is displayed the diode terminals are reversed, the diode P-N
junction is damaged
CAUTION
EN - 10
HT25N
jack and black plug