Campbell Scientific RTDAQ Software - Manual (Page 171)

Section 7. Monitoring Data in Real-time
7.4.6 Data Retrieval Methods used by the Graph Screen
Choose whether to Graph All Data, Fill Graph Width, or graph only the
Newest Records.
If Graph All Data is selected, all data records will be collected and displayed
in the graph. Multiple screens of uninterrupted data can be shown, but the
display may fall behind real-time in faster applications. Eventually, after
several screens of uninterrupted data, there may be a break in data. This
happens when the buffer used to collect data is filled. Graphing will then start
over at real-time.
Choosing Fill Graph Width will calculate the number of points needed to fill
the current Graph Width, collect that many points, draw the screen, and then
return to collect the next set of records. Time-consecutive points will be drawn
for the current screen of data. However, the graph will catch up to real-time at
the beginning of each new screen.
If Newest Records is selected, only the newest records will be collected and
displayed. The number or records to collect is specified in the box. In this
mode, records may be skipped, but the display will not fall behind.
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