13.3 Measurement Specifications
174
Dip (Dip)
Measurement method IEC61000-4-30 compliant
During 50/60 Hz measurement, a dip is detected when the RMS voltage refreshed each half-cycle
exceeds the threshold in the negative direction.
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) exceeds the threshold in the neg-
ative direction.
Sampling frequency 200 kHz
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, resolution 600.00 V
Measurement band See RMS frequency characteristics.
Measurement accuracy Same as for RMS voltage refreshed each half-cycle
Within half a cycle of the start accuracy time, within half a cycle of the end accuracy time (not spec-
ified 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 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
obtained by adding the hysteresis to the threshold in the negative direction
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.
Interruption (Intrpt)
Measurement method IEC61000-4-30 compliant
During 50/60 Hz measurement, an interruption is detected when the RMS voltage refreshed each
half-cycle exceeds the threshold in the negative direction.
During 400 Hz measurement, an interruption is detected when 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.
Sampling frequency 200 kHz
Displayed item Interruption depth : Worst value for RMS voltage refreshed each half-cycle [V]
Interruption duration : Period from the time a U1 to U3 interruption is detected until the reading ex-
ceeds the value obtained by adding the hysteresis to the threshold in the
positive direction
Measurement range, resolution 600.00 V
Measurement band See RMS frequency characteristics.
Measurement accuracy Same as for RMS voltage refreshed each half-cycle
Within half a cycle of the start accuracy time, within half a cycle of the end accuracy time (not spec-
ified 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
obtained by adding the hysteresis to the threshold in the positive direction
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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