Power Tabular Display; Power Tabulation - Arbiter Systems Portable Power Sentinel 933A Operation Manual

4.7

Power Tabulation

Displays the Active, Reactive, Apparent and Q Results, as well as Power
Factor, of power measurements for the configured system. Min–Max
Results changes the soft keys to allow access to Normal, Minimum,
Maximum and Average Results.
Figure 4.11: Power Tabular Display
Press the EXIT Min–Max soft key to exit the Min–Max RESULTS menu
and return to the Power Tabulation main menu.
4.7.1 Power Calculations
Power and Energy are determined by making twenty separate measure-
ments per second with each measurement using 1024 samples (i.e. it takes
data from a 100 millisecond window). This yields a 50% overlap for all
readings to preserve accuracy. Therefore, since power is averaged over
the interval, the displayed value may not exactly match what you would
compute by multiplying the currents and voltages for each second.
For more detailed information on power calculations, see Appendix A:
Model 933A Functional Description.
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