Chapter 7 Monitoring Meters Viewing Real-time Waveforms
PM130 PLUS Powermeter Series_Installation Operation and Manual 131
7.3.2 Viewing a Frequency Plot
Click on the button to view a cycle-by-cycle frequency plot for the sampled voltage waveforms.
7.3.3 Viewing a Harmonic Spectrum
Click on the button to view a spectrum chart for the selected waveform channel. PAS provides voltage,
current, active power and reactive power spectrum charts. See Viewing Real-time Harmonic Spectrum for
more information on viewing options.
7.3.4 Viewing Phasor Diagrams
The phasor diagrams show you relative magnitudes and angles of the three-phase voltage and current
fundamental component. All angles are shown relative to the reference voltage channel.
To change the reference channel, click on the waveform window with the right mouse button, select
Options..., click on the Phasor tab, check the channel you want to make a reference channel, and then
click OK.
7.3.5 Viewing Symmetrical Components
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.
7.3.6 Viewing Phase-to-phase Voltages
PAS can transform phase-to-neutral voltage waveforms in configurations with a neutral into phase-to-
phase waveforms allowing you to view the waveshape, angle relationships and harmonics of the phase-
to-phase voltages.
Click on the button on the waveform window toolbar. Click the button once again to return to phase-to-
neutral waveforms.
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