Select Analysis | Charts.
From the Series menu, select New. The Select Data window appears.
In the Data sources section, click. The Select Data window appears.
Click to select the data source with interval data you want to include on the chart.
Clickto open folders and view their contents.
If you are unable to locate the appropriate device, click More. Follow the instructions for Finding Data Sources.
In the Date range section, select a date range that the chart should encompass.
To set a predefined date range, select the appropriate time frame in the Range field.
To set a specific date range, in the Start and End date fields, type the date or use the drop-down arrow to select the date from a calendar.
To aggregate the data on your chart, click More and select the Aggregate data option.
After making your selections, click OK. The chart is displayed with the new series.
NOTE: If the date range selected does not contain any data, a message window appears. Click OK to close the message window then select another date range.