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4.2
AC voltage (frequency, duty cycle) measurement
WARNING: Risk of Electrocution. The probe tips may not be long
enough to contact the live parts inside some 240 V 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 green VAC/Hz/% position
2.
Insert the black test lead banana plug into the negative COM jack
3.
Insert red test lead banana plug into
the positive V jack
4.
Touch the black test probe tip to the
neutral side of the circuit
5.
Touch the red test probe tip to the
"hot" side of the circuit
6.
Read the voltage in the display
7.
Press the HZ/% button to indicate "Hz"
8.
Read the frequency in the display
9.
Press the Hz/% button again to
indicate "%"
10. Read the % of duty cycle in the display
40
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