EDMI Atlas Mk10, Hardware Reference Manual

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System SpecificationsError! Reference source
not found. A-1
A p p e n d i x
A
A p p e n d ix A
System Specifications
This appendix covers the basic specifications of the meter.
Measured Quantities and Methods
The meter can measure the quantities listed in Table A-1.
Quantity Units Description
Watt hours Wh The total Wh.
var hours Varh The fundamental varh.
In 2 element mode calculated from sqrt(VAh
2
- Wh
2
)
VA hours VAh The total VAh, calculated from Vrms x Irms.
In 2 element mode calculated from sqrt(Wh
2
+ varh
2
)
Watts W The total W.
vars Var The fundamental vars.
In 2 element mode calculated from sqrt(VA
2
- W
2
)
VA VA The total VA, calculated from Vrms x Irms.
In 2 element mode calculated from sqrt(W
2
+ var
2
)
Voltage V True RMS voltage.
Current A True RMS current.
Frequency Hz Fundamental system frequency.
Phase Angle Degrees Angle between Fundamental Voltage and Fundamental Current.
Phase to
Phase Angle Degrees Angle between Fundamental Voltages.
Power
Factor Ratio Watts divided by VA. Lead or lag determines the sign.
•
Table A-1 Measurements
Note: The sign of VAh is based on the sign of the Wh, as VA itself has no sign..