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2.4 Measurement Procedure
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The current RMS value will be shown on the display.
• Always clamp the instrument around only one conduc-
tor. Clamping the instrument around two or more of
conductors in a bundle prevents the instrument from
measuring any current regardless of whether the mea-
surement target is a single-phase or three-phase cir-
cuit.
• The frequency of special waveforms such as at the
secondary side of an inverter may not be indicated cor-
rectly.
• Depending on the magnitude and frequency of the
input current, resonances may be heard from the
clamp jaw. This does not affect the measurement.
• Do not input a current in excess of the maximum allow-
able current for the current range being used.
• Displayed values can frequently fluctuate due to
induction potential even when no voltage is applied.
This, however, is not a malfunction.
OK
NG
HIOKI FT6380B981-01
www.calcert.com
1.800.544.2843
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