13.3 Measurement Specifications
172
Frequency cycle (Freq_wav)
Measurement method Calculated as the reciprocal of the accumulated whole-cycle time during one U1 (reference chan-
nel) cycle.
Frequency is given per waveform.
When set to a measurement frequency of 400 Hz, calculated as the reciprocal of the accumulated
whole-cycle time during 8 cycles.
Average frequency is given for 8 waveforms.
Sampling frequency 200 kHz
Displayed item Worst frequency cycle value between EVENT IN and EVENT OUT (max. deviation).
Measurement range, resolution When the measurement frequency is set to 50/60 Hz:: 70.000 Hz
When the measurement frequency is set to 400 Hz : 440.00 Hz
Measurement band When the measurement frequency is set to 50/60 Hz : 40.000 to 70.000 Hz
When the measurement frequency is set to 400 Hz : 360.00 to 440.00 Hz
Measurement accuracy When the measurement frequency is set to 50/60 Hz:
0.200 Hz or less (for input from 10% f.s. to 110% f.s.)
When the measurement frequency is set to 400 Hz:
2.00 Hz or less (for input from 10% f.s. to 110% f.s.)
Event threshold Specified as deviation of 0.1 to 9.9 Hz in 0.1 Hz increments.
Event IN Start time of waveform exceeding threshold
Event OUT Start time of waveform returning to (threshold - 0.1 Hz)
Note: Equivalent to 0.1 Hz frequency hysteresis.
Multiple-phase system treatment None
Saved waveforms Event waveforms
RMS voltage refreshed each half-cycle (Urms1/2)
Measurement method True RMS type IEC6100-4-30 compliant
When the measurement frequency is set to 50/60 Hz, RMS voltage values are calculated using
sample data for 1 waveform derived by overlapping the voltage waveform every half-cycle. When
the measurement frequency is set to 400 Hz, the RMS voltage value is calculated for each voltage
waveform. The line voltage is used for 3-phase 3-wire (3P3W3M) connections, while the phase
voltage is used for 3-phase 4-wire connections.
Sampling frequency 200 kHz
Displayed item RMS voltage refreshed each half-cycle
Measurement range, resolution 600.00 V
Measurement band See RMS frequency characteristics.
Measurement accuracy When the measurement frequency is set to 50/60 Hz:
With 1.666% f.s. to 110% f.s. input:
Specified as 0.2% of nominal voltage with a nominal input voltage (Udin) of at least 100 V.
With input outside the range of 1.666% f.s. to 110% f.s. or a nominal input voltage (Udin) of less
than 100 V: 0.2% rdg. 0.08% f.s. to
When the measurement frequency is set to 400 Hz: 0.4% rdg.0.50%f.s.
Event threshold See dips/swells/interruptions.
Event IN See Dip/ Swell/Interruption
Event OUT See Dip/ Swell/Interruption
Multiple-phase system treatment None
Saved waveforms None
Constraints With a 400 Hz measurement frequency, measured values recorded on the event voltage fluctua-
tion graph consist of RMS voltage values for each waveform.
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