UNI-T UT105, Operating Manual

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Measurement Operation(7)
l
The LCD will display 1 indicating open-circuit for
wrong connection.
l
The unit of diode is Volt (V), displaying the positive-
connection voltage-drop value.
l
When diode testing has been completed, disconnect
the connection between the testing leads and the
circuit under test.
E.Continuity Testing (see figure 6)
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 and continuity.
Never attempt an in-circuit current measurement
where the open circuit voltage between terminals
and ground is greater than 60V DC or 30V AC rms.
To test for continuity, connect the Meter as below:
1. Insert the red test lead into the
terminal and the
black test lead into the COM terminal.
2. Set the rotary switch to .
3. Connect the test leads across with the object being
measured.
The buzzer does not sound when the resistance value
is >50. The circuit is disconnected.
The buzzer sounds continuously when the resistance
value is 30
Ω
. The circuit is in good condition.
Note
l
The LCD displays 1 indicating the circuit being tested
is open.
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Open-circuit voltage is approx. 2.7V.
l
When continuity testing has been completed,
disconnect the connection between the testing leads
and the circuit under test.
Model UT105: OPERATING MANUAL
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