Satec Expertmeter EM720 Operation Manual page 169

Chapter 9 Viewing Log Files and Reports
Viewing Symmetrical Components
Selecting Primary and Secondary Units
Using the Marker Lines
EM720 Power Quality and Revenue Meter
click on the "Phasor" tab, check the channel you want to
make a reference channel, and then click "OK".
If you leave the Triangle box checked, PAS connects the
ends of the voltage and current vectors showing you
three-phase voltage and current triangles. This is useful
when analyzing voltage and current unbalances.
Phasor diagrams are calculated over one waveform cycle
pointed to by the left marker line. As you move the
marker, the phasor diagrams are updated reflecting the
new marker position.
Waveform views have an additional pane at the right
where PAS displays the symmetrical components for
voltages and currents, calculated for the point indicated by
the left marker line. To enable or disable the symmetrical
components, click on the waveform window with the right
mouse button, select "Options...", check or uncheck the
"Symmetrical components" box on the "Channels" tab,
and then click OK.
Voltages and currents can be displayed in primary or
secondary units. To select units for your waveforms, click
on the waveform window with the right mouse button,
select "Options...", select the desired units for voltages
and currents on the Channels tab, and then click OK.
Waveform and RMS panes have two blue dashed marker
lines. The left marker indicates the position from where
data is taken to calculate the harmonics spectrum and
phasor diagrams, and also as the starting position for
calculating the RMS, average and peak values. The right
marker indicates the end position for calculating the RMS,
Viewing Waveforms
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