Model UT90C: OPERATING MANUAL
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indicating open-circuit or polarity for wrong
connection.
z
Open-circuit voltage of diodes
measurement is about 1.48V.
z
To measure online diode, please turn off
power of the circuit and discharge all
capacitors.
z
When diode testing has been completed,
disconnect the connection between the
testing leads and the circuit under test.
E. Continuity Measurement(see figure 7)
Warning
To avoid injury to the user, please do not
attempt the voltage higher than 60V/DC or
30V/AC.
To avoid damages to the Meter or to the
devices under test, disconnect circuit power
and discharge all the capacitors before
measuring continuity.
To test for continuity, connect the Meter as
below:
1.
Insert the red test lead into the
Hz
V
Ω
terminal and the black test lead into the
COM
terminal.
2.
Set the rotary switch to
Ω
&
,
press
SELECT
button to choose
&
range.
Parallel connect the test leads across with
the circuit being measured.
3.
The resistance of a open circuit under test
