25
C. Testing for Continuity
(see figure 5)
Warning!
To avoid damages to the Meter or to the devices under test, disconnect
circuit power and discharge all the high-voltage capacitors before measuring
continuity.
To test for continuity, connect the Meter as follows:
1. Insert the red test lead into the
VΩHz
terminal and the black test lead into the
COM
terminal.
2. Set the rotary switch to
and press
SELECT
button to select measurement mode.
3. The buzzer sounds if the resistance of a circuit under test is less than 10Ω.
4. The buzzer may or may not sound if the resistance of a circuit under test is between 10Ω to
100Ω.
5. The buzzer does not sound if the resistance of a circuit under test is higher than 100Ω.
figure 5
Note:
- To avoid harms to you or damages to the Meter from eletric shock, do not attempt to input
voltages higher than 33V AC or 70V DC.
- When continuity testing has been completed, disconnect the connection between the testing
leads and the circuit under test and remove testing leads from the input terminals.
D. Testing Diodes
(see figure 6)
Warning!
To avoid damages to the Meter or to the devices under test, disconnect circuit
power and discharge all the high-voltage capacitors before testing diodes.
Use the diode test to check diodes, transistors, and other semiconductor devices.
The diode test sends a current through the semicondutor junction, then measure the voltage
drop across the junction. A good silicon junction drops between 0.5V and 0.8V.
To test the diode out of a circuit, connect the Meter as follows:
1. Insert the red test lead into the
VΩHz
terminal and black test lead into the
COM
terminal.
2. Set the rotary switch to
. Press
SELECT
to switch to
measurement mode. 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 LCD will
display
OL
indicating diode being tested is open or polarity error display.
