ACR Electronics PowerWatch, Reference Manual, Page: 66 / 88

PowerWatch©
59
2007 ACR Systems Inc.
5.2.2.3 Viewing Events as an Event Distribution Graph
Event Distribution Graph
The Event Distribution Graph plots the magnitude of the event against
duration on a logarithmic scale in order to determine the importance of the
data. For example, a single random event may not be as significant as a
cluster of recurring events.
This information can be interpreted using the CBEMA Curve found in
Appendix B, Power Quality Issues, in the PowerWatch Reference Guide.
With the Site Report window open at the Events tab, choose Event
Distribution Graph from the View menu (or click the Event Distribution button
on the Toolbar).
Since the impulses have a duration that is unknown, they are represented as
having a width of 10 microseconds.
Choosing Viewing Options
The Graph Setup dialog box gives you a number of viewing options.
To open the dialog box, choose Show Graph Setup from the Options menu
so that ther is a check mark in front of it.
Then, choose Event Distribution from the View menu.
The Graph Setup dialog box will appear enabling you to make you display
choices. An explanation of these choices is given in Displaying Events as a