13.2 Input Specifications/Output Specifications/Measurement Specifications
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(6) Dip (Dip)
Measurement method Compliant with IEC61000-4-30
During 50 Hz/60 Hz measurement, a dip is detected
when the RMS voltage refreshed each half-
cycle falls below the threshold.
During 400 Hz measurement, a dip is detected when the minimum of
4 RMS voltage values occur-
ring within 10 ms (values calculated for one 400 Hz waveform) falls below the threshold.
Displayed item Dip depth : Worst value for RMS voltage refreshed each half-cycle [V]
Dip duration: Period from the time a U1 to U3 dip is detected until the reading exceeds the value
obtained by subtracting the hysteresis from the threshold in the positive direction
Measurement range 600.00 V
Measurement accuracy Same as for RMS voltage refreshed each half-cycle
Period: Within half a cycle of the start accuracy time, within half a cycle of the end accuracy time
(not specified for 400 Hz measurement)
Event threshold Percentage of the nominal voltage or percentage of the slide reference voltage (user-selectable)
Event IN Start of the waveform for which the RMS voltage refreshed each half-cycle fallen below the thresh-
old
Event OUT Start of the waveform for which the RMS voltage refreshed each half-cycle fallen below the value
calculated by adding the hysteresis to the threshold.
Multiple-phase system treatment Starts when any of the U1 to U3 channels experiences a dip and ends when the dip has ended for
all channels.
Saved waveforms Event waveforms
Fluctuation data RMS data refreshed each cycle is saved from 0.5 s before to 29.5 s after the EVENT IN. When set
to 400 Hz, RMS data refreshed each cycle is saved from 0.125 s before to 7.375 s after.
(7) Interruption (Intrpt)
Measurement method Compliant with IEC61000-4-30
During 50 Hz/60 Hz measurement, an interruption is detected when the RMS voltage refreshed
each h
alf-cycle falls below the threshold.
During 400 Hz measurement, an interruption is detected w
hen the minimum of 4 RMS voltage val-
ues occurring within 10 ms (values calculated for one 400 Hz waveform) exceeds the threshold in
the negative direction.
Displayed item Interruption depth : Worst value for RMS voltage refreshed each half-cycle [V]
Interruption duration : Period from the time a U1 to U3 interr
uption is detected until the reading ex-
ceeds the value obtained by adding the hysteresis to the threshold
Measurement range 600.00 V
Measurement accuracy Same as for RMS voltage refreshed each half-cycle
Period: Within half a cycle of the start accuracy time, within half a cycle of the end accuracy time
(not specified for 400 Hz measurement)
Event threshold Percentage of the nominal voltage
Event IN Start of the waveform for which the RMS voltage refreshed every cycle exceeded the threshold in
the negative direction
Event OUT Start of the waveform for which the RMS voltage refreshed each half-cycle exceeded the value
calculated by adding the hysteresis to the threshold
Multiple-phase system treatment Starts when all of the U1 to U3 channels experience an interruption and ends when the interruption
ends for any of the channels.
Saved waveforms Event waveforms
Fluctuation data RMS data refreshed each cycle is saved from 0.5 s before to 29.5 s after the EVENT IN. When set
to 400 Hz, RMS data refreshed each cycle is saved from 0.125 s before to 7.375 s after.
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