24
(figure 6)
To test a diode out of a circuit, connect the Meter as follows:
1. Insert the red test lead into the VΩmA terminal and the black test lead into the COM terminal.
2. Set the rotary switch to
Diode measurement is default or press SELECT button to
select diode measurement mode.
3. For forward voltage drop readings on any semiconductor component, place the red test lead
on the component’s anode and place the black test lead on the component’s cathode.
The measured value shows on the display.
Note
- In a circuit, a good diode should still produce a forward voltage drop reading of 0.5V to 0.8V;
however, the reverse voltage drop reading can vary depending on the resistance of other pathways
between the probe tips.
- Connect the test leads to the proper terminals as said above to avoid error display. The LCD
will display “OL” indicating open-circuit for wrong connection. The unit of diode is Volt (V),
displaying the positive-connection voltage-drop value.
- When diode testing has been completed, disconnect the connection between the testing leads
and the circuit under test.
Testing for Continuity
To test for continuity, connect the Meter as below:
1. Insert the red test lead into the VΩmA terminal and the black test lead into the COM terminal.
2. Set the rotary switch to
.
3. Press SELECT button to select continuity measurement mode.
4. Connect the test leads across with the object being measured.
The buzzer sounds if the resistance of a circuit under test is less than 100Ω.
G. Transistor hFE Measurement (see figure 7)
Warning!
To avoid damages to the Meter or to the devices under test, do not input any
current over 60V DC or 30V AC.
1. Check that the transistor is PNP or NPN type.
2. Connect the transistor to be measured to the corresponding jacks.
3. LCD display hFE reference value.
