11
Diode Test
Warning:
To avoid possible damage to the meter and to the device under test,
disconnect circuit power and discharge all high-voltage capacitors before testing
diodes. To avoid personal injury, please do not attempt to input voltages higher than
60V DC or 30V AC.
•
Perform the diode test to check diodes, transistors, and other semiconductor
devices. The diode test sends a current through the semiconductor junction, and
then measures the voltage drop across the junction. A good silicon junction drops
between 0.5V and 0.8V.
To test a diode out of a circuit, connect the meter as follows:
•
Insert the red test lead into terminal and the black test lead into the COM terminal.
•
Set the rotary switch to
Ω
and press SELECT button to select
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 measured value shows on the display.
•
Note Connect the test leads to the proper terminals as said above to avoid error
display. The LCD will display OL indicating diode being tested is open or polarity
is reversed. The unit of diode is Volt (V), displaying the forward voltage drop
readings.
•
Open circuit voltage is around 2.7V.
•
When diode testing is completed, disconnect the test leads from the device under
test.
Capacitance Measurement
Warning:
To avoid damage to the meter or to the equipment under test, disconnect
circuit power and discharge all high-voltage capacitors before measuring
capacitance. Use the DC Voltage function to confirm that the capacitor is discharged.
To measure capacitance, connect the meter as follows:
•
Insert the red test lead into the Hz
Ω
mV terminal and the black test lead into the
COM terminal.
•
Set the rotary switch to
. The Meter may display a fixed reading which is a
internal distributed capacitor value. For testing less than 10nF capacitor, the
tested value must subtract the 3. It is recommended to use test clip to carry out
measurement to reduce the effect of internal capacitance.
Содержание 72-8720
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