Chapter 7 Monitoring Meters
Viewing Real-time Waveforms
124
PM135 Powermeter Series
See
Working with Tables
in Chapter 9 for more information on working
with tables.
7.3
Viewing Real-time Waveforms
To retrieve real-time waveforms from your meter:
1.
Ensure that the
On-line
button
on the PAS toolbar is checked.
2.
Select the device site from the list
box on the toolbar.
3.
Select
RT Waveform Monitor
from
the
Monitor
menu or click on the
button on the PAS toolbar.
Use the Poll button
for a single-step poll or the Continuous poll
button for continuous polling.
To stop continuous polling, click on the Stop button
.
The meter provides simultaneous capture of six one-cycle voltage and
current AC waveforms at a rate of 64 samples per cycle. To give you a
more representative picture, PAS extends the waveforms across the
window up to eight cycles by repeating the captured waveforms.
To select the channels you want to view, click with the right mouse button
on the waveform window, select
Channels...,
check the channels for the
phase you want displayed, and then click
OK
.
See
Working with Graphic Windows
in Chapter 9 for more information on
working with waveforms.
Retrieved waveforms can be displayed in different views as overlapped or
non-overlapped waveforms, as RMS cycle-by-cycle plot, or as a harmonic
spectrum chart or table.
Viewing a Waveform Graph
When you open a new file, PAS shows you a waveform graph with non-
overlapped waveforms as shown in the picture above.
Click on the
button on the local toolbar to see overlapped waveforms.
Click on the
button for non-overlapped waveforms.
