UNI-T UT 61+ Series User Manual page 8

3. AC/DC Millivolt Voltage Measurement (Picture 6)
Picture 6
1) Insert the red test lead into the
into the COM terminal.
2) Turn the function dial to the position.
3) Short press the SELECT button to switch to AC/DC millivolt voltage measurement
if required.
4) Connect the test leads with the measured load or power supply in parallel.
5) Read the voltage value on the display.
6) When measuring AC millivolt voltage, short press the
the frequency/duty ratio of the measured voltage.
Caution:
Do not input a voltage over 1000V or it may damage the meter.
Be cautious to avoid electric shock when measuring high voltages.
After completing the measurement, disconnect the test leads from the circuit
under test.
Before each use, verify meter operation by measuring a known voltage.
The input impedance of the AC mV range is about 10MΩ. This load effect may
cause measurement errors in high-impedance circuits. In most cases, if the
impedance of the circuit is below 10kΩ, the error can be ignored (≤0.1%).
or terminal, and black test lead
button to display
The input impedance of the DC mV range is infinite (about 1GΩ), and it does
not attenuate when measuring weak signals, so the measurement accuracy
is high. When the test leads are open, there may be a value on the screen,
but this is normal and will not affect the measuring result.
Frequency measurement at 60mV range (AC voltage) is for reference only
(UT61B+/UT61D+).
4. LoZ (low impedance) ACV Measurement
(UT61D+, Picture 7)
Picture 7
1) Insert the red test lead into the
COM terminal.
2) Turn the function dial to the
3) Connect the test leads with the measured load or power supply in parallel.
4) Read the voltage value on the display.
5) Short press the button to display the frequency/duty ratio of the measured
voltage.
Caution:
Do not input a voltage over 1000V or it may damage the meter.
Be cautious to avoid electric shock when measuring high voltages.
After completing the measurement, disconnect the test leads from the circuit
under test.
Before each use, verify meter operation by measuring a known voltage.
After using the LoZ function, wait 3 minutes before next operation.
LoZ ACV measurement eliminates ghost voltage for more accurate measurement.
terminal, and black test lead into the
position.