UNI-T UT58E Operating Manual page 16

Model UT58E: OPERATING MANUAL
Measurement Operation(3)
Warning
Never attempt an in-circuit current measurement
where the open circuit voltage between terminals
and ground is greater than 60V DC or 30V rms in AC.
If the fuse burns out during measurement, the Meter
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.
The DC Current Measurement has 3 measurement
positions on the rotary switch: 2mA, 200mA and 20A
The AC Current Measurement has 3 measurement
positions on the rotary switch: 20mA, 200mA and 20A
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 20A or mA input
terminal and the black test lead into the COM terminal.
When you measure current below 200mA, please
insert the red test lead into the mA input terminal.
When you measure 200mA or above, insert the red
test lead into the 20A input terminal.
3. Set the rotary switch to an appropriate measurement
position in A
4. Break the current path to be tested. Connect the red
test lead in serial 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.
or A range.
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