9
Autoranging Digital Multimeter
4-2.AC Voltage Measurement
WARNING:
Risk of Electrocution. The probe tips may not be long enough to contact the live parts
inside some 240V outlets for appliances because the contacts are recessed deep in the outlets. As
a result, the reading may show 0 volts when the outlet actually has voltage on it. Make sure the
probe tips are touching the metal contacts inside the outlet before assuming that no voltage is
present.
CAUTION:
Do not measure AC voltages if a motor on the circuit is being switched ON or OFF. Large
voltage surges may occur that can damage the meter.
1.Set the function switch to the
VAC
Position.
2.Insert the black test lead banana into the
COM
Input Jack; Insert the red test lead banana into
the
Positive
Input Jack.
3.Touch the test probe tips to the circuit under test, be sure to observe the correct polarity (Red lead
to positive, Black lead to negative).
4.Read the voltage in the display.
Autoranging
Digital Multimeter
OFF
mA
μ
A
V
Auto
Power
Off
Ω
V
MODE
MAX
COM
V
Ω
mA
μ
A
200mA/600V
CAT III 300V
CAT II 600V
