Dranetz Visa Betriebsanweisung Seite 157

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7-21
CH 7/ View Event Data
RMS settings
The PowerVisa provides setup options to measure rms data per cycle or per second.
The RMS Voltage and RMS Current parameters are available under Journal Categories
- Standard List.
Cyclic RMS: RMS values are computed over 1 power frequency cycle (16.67 msec @
60 Hz) in 1/2 cycle steps (every 8.33 msec). The min/max/avg of these cyclic values
are continually updated and saved every user-programmed journal interval (see Chapter
6 Advanced Setup Options - Journal Interval for Timed Readings on page 6-21).
1-Sec RMS: Similar to cyclic rms, except that each rms value is computed over 1
second’s worth of data points (which is 1/60th of a second @ 60 Hz), rather than over 1
cycle.
NOTE: Data for Cyclic or 1-Sec sampling rates apply only to rms parameters.
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