19
Measurement Operation(6)
red black
( figure 6)
Model UT90C: OPERATING MANUAL
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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.
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When diode testing has been completed, disconnect
the connection between the testing leads and the
circuit under test.
Continuity Measurement
(see figure 6)
To test for continuity, connect the Meter as below:
1. Insert the red test lead into the
HzV
Ω
terminal and
the black test lead into the
COM
terminal.
2. Set the rotary switch to
Ω
and press
SELECT
button to select measurement mode.
3. The buzzer does not sound if the circuit is disconnected
with resistance value is > 100
Ω
The buzzer sounds continuously if the circuit is in
good condition with resistance value 10
Ω.
4. The nearest circuit resistance value shows on the
display, the unit is
Ω.
Note
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The LCD displays
OL
indicating the resistance of
the circuit being tested is higher than 400
Ω
.
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The buzzer sounds once if the
RESET
,
SELECT
or is pressed on.
