Operation; Current Measurements - AEMC 721 User Manual

Clamp-on harmonic meter

Table of Contents

5.1

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1. Turn the rotary switch to the current measurement function A~.

Selection is confirmed with a short beep.

2. Press the trigger to open the jaws. Clamp the jaws around the con-

ductor. The most accurate readings are obtained with the conductor

aligned with the centering marks on the jaws.

3. Take the reading from the display. Current measurements are pos-

sible from 50 mA to 700.0 Arms, and to 999.9 A Peak.

Although the meter can display up to 999.9 A in Auto Range and in the 600

A manual range, the warning symbol will be displayed above 700 Arms

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 A peak in the Peak mode and may also be

accompanied by the warning triangle if the RMS value exceeds 700 A.

The warning symbol may also be displayed if the input signal is too low

(<50 mA) or if the fundamental signal is not 50 or 60 Hz.

Harmonic Meter Model 721

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WARNING

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