Ac Current Measurement - UNI-T UT50E Operating Manual

Measurement Operation(5)
Note
l
If the value of current to be measured is unknown,
use the maximum measurement position (20A) and
20A terminal, and reduce the range step by step
until a satisfactory reading is obtained.
l When current measurement has been completed,
disconnect the connection between the testing leads
and the circuit under test.
D. AC Current Measurement
( figure 4)
Warning
Never attempt an in-circuit current measurement
where the voltage between terminals and ground is
greater than 60V.
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 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 mA or 20A terminal
and the black test lead into the COM terminal.
Model UT50E: OPERATING MANUAL
(see figure 4)
black
17
red