Voltage Measurements - AEMC 721 User Manual

5.2

Voltage Measurements

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1. Turn the rotary switch to the voltage measurement function V~.
Selection is confirmed with a short beep.
2. Insert the red test lead into the
into the
clips).
3. Touch or connect the voltage test leads to the circuit under test.
4. Take the reading from the display. Voltage measurements are pos-
sible from 50 mV to 600 Vrms, and to 999.9 V Peak.
Though the meter can display to 999.9 V in Auto Range and in the 600
V manual range, the warning symbol will be displayed above 600 Vrms
and accompanied by a beeping alarm sound. This indicates that the input
exceeds the specified safety and operating range. The displayed value is
only indicative and not specified.
Do not continue to operate the instrument when the input value
exceeds the meter safety and operating specifications.
OL is displayed above 1000 V peak in the Peak mode and may also be
accompanied by the warning triangle if the RMS value exceeds 600 V.
The warning symbol may also be displayed if the input signal is too low
(<50 mV) or if the fundamental is not 50 or 60 Hz.
Harmonic Meter Model 721
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jack. Select the appropriate termination (test probes or
WARNING
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jack and the black test lead
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