UNI-T UT105, Operating Manual

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may be damaged or the operator himself may be hurt.
Use proper terminals, function, and range for the
measurement. When the testing leads are connected
to the current terminals, do not parallel them across
any circuit.
Measurement Operation(3)
The measurement ranges of DC current are: 200.0mA
and 10.00A.
To measure current, do the following:
1. Turn off power to the circuit. Discharge all high-
voltage capacitors.
2. Insert the red test lead into the
mA or 10A terminal
and the black test lead into the COM terminal.
3. Set the rotary switch to an appropriate measurement
position in
A r .
4. Break the current path to be tested. Connect the red
test lead to the more positive side of the break and
the black test lead to the more negative side of the
break.
5. Turn on power to the circuit.
The measured value shows on the display.
Note
l
If the value of current to be measured is unknown,
use the maximum measurement position (10A) and
10A terminal, and reduce the range step by step until
a satisfactory reading is obtained.
l
When DC current measurement has been completed,
disconnect the connection between the testing leads
and the circuit under test.
l
At 10A Range: for continuous measurement 10
seconds and interval time between 2 measurements
greater than 15 minutes.
Model UT105: OPERATING MANUAL
19