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SICAM Q80 7KG8080
Note
5.1.2.3.9.2 Tolerance range and data reduction
The data reduction tolerance range influences how voltage events are detected. The wider the tolerance range,
the less precise the recognition of events will be.
With the voltages L1-L3, the tolerance set is the range nominal voltage ±10%. Outside of that range the
tolerance is divided by 2. For minor voltage fluctuations, you obtain highly reduced data (in extreme cases, less
than for the averaging). If the voltage leaves the "good range", there is more precise recording, for better plotting
of dips/surges.
The current measurement channels can be deactivated since the accumulation of data can be very high when
there is strong fluctuation!
When the option box active is selected, along with the current mean values a data reducing channel based on
RMS-values computed for each half period is recorded. When the tolerance is too small, or if there are strong
current fluctuations, data are recorded in the worst case scenario every 10 ms or 8.3 ms (in the 50 Hz or 60 Hz
networks, respectively). This means that the plot of the current is mapped very precisely, but in consequence,
about 1.4 MByte of data are produced per channel and hour.
For this reason, we recommend setting a small tolerance only for short measurements where the mean values
are not adequate for the analysis.
Entering a setting for the tolerance also activates parallel recording of the plot of the 10 ms RMS-values. The
plots for the PQ-analysis system set are calculatedd automatically. Here, you activate additional recording of the
associated L-L or L-N voltages.
Power Quality Recorder SICAM Q80 7KG8080, System manual
E50417-H1076-C420-A2, Release 12.01.2015
The averaged value appears in the curve window at the chronological start of the averaging
interval. In the line display mode "Steps", the average value is displayed over the entire
averaging interval.
Data reduction tolerance range
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