UNI-T ut71c Operating Manual page 35

Model UT71C/D/E: OPERATING MANUAL
1. Turn off power to the circuit. Discharge all high-
voltage capacitors.
2. Insert the red test lead into the mAµA or A terminal
and black test lead into the COM terminal.
3. If you are using the A terminal, set the rotary switch
to A . If you are using mAµA terminal, set the
rotary switch to µA for currents below 40000µA ,
or mA for current above 40000µA.
4. DC measurement is default, press blue butt o n to
select AC measurement.t
5. Open the circuit path to be tested. Touch the red
testing leads to the more positive side of the break;
touch the black probe to the more negative side of
the bread. Reversing the leads will produce a
negative reading, but will not damage the Meter.
6. Turn on power to the circuit; then read the display.
AC measurement displays the True RMS value.
DC measurement displays the effective value of sine
wave (mean value response)
7. Turn off power to the circuit and discharge all high-
voltage capacitors. Remove the Meter and restore
the circuit to normal operation.
When a ACA function is selected, you can press the
Yello w Butt o n to view the AC + DC True RMS value
in the primary display. To exit, please EXIT button.
Note
l If the value to be measured is unknown, use the
maximum measurement position and reduce the
range step by step until a satisfactory reading is
obtained.
l When the measured current is 5A, continuous
measurement is allowed.
l When the measured current is between 5A-10A,
continuous measurement 10 seconds and interval
more than 15 minutes.
l When current measurement has been completed,
disconnect the connection between the testing leads
and the circuit under test and remove testing leads
away from the input terminals of the Meter.
33