E-Mon E-PS-E-RTU-N - Manual (Page 119)

Chapter 7 Monitoring Meters Viewing Real-time Harmonic Spectrum
PowerSmart+ Power Quality Meter 119
Viewing a Frequency Plot
Click on the
button to view a cycle-by-cycle frequency plot for the
sampled voltage waveforms.
Viewing a Harmonic Spectrum
Click on the
button to view a spectrum chart for the selected
waveform channel. Power Software provides voltage, current, active
power and reactive power spectrum charts. See
Viewing Real-time
Harmonic Spectrum for more information on viewing options.
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.
Viewing Symmetrical Components
Waveform views have an additional pane at the right where Power
Software 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.
Viewing Phase-to-phase Voltages
Power Software 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.
7.4 Viewing Real-time Harmonic Spectrum
To retrieve real-time harmonic spectrum from your meter:
1. Ensure that the On-line button on the Power Software toolbar
is checked.
2. Select the device site from the list box on the toolbar.
3. Select RT Harmonic Monitor from the Monitor menu or click on
the button on the Power Software toolbar.
Click on the “Poll” or “Continuous poll” button to poll the meter once
or continuously. Click on the Stop button
to stop continuous polling.