Edelbrock QwikData 91001 Manual page 38

The "Secondary File" menu will now be active. Click on this menu to see a list of the available laps from the secondary file and click
on the lap you wish to overlay.
NOTE: This secondary file must have exactly the same Digital and Analog Channel Configuration as the primary file.
The selected lap from the secondary file will now be overlaid on the Historical Graph and represented by dotted lines. To remove the
secondary file lap from the graph select "None" from the "Secondary File" menu. If the selected secondary file is not broken up into
laps, then the "Secondary File" menu will only contain "(None)" and "Secondary Data" as shown below.
Select "Secondary Data" to overlay the secondary file or "(None)" to view only the primary file data.
Aligning Primary and Secondary File Graphs
Two data files such as two drag runs will rarely start at the same time relative to the start of the run. As a result, when comparing
these files by overlaying them on the historical graph, the two files will not "line-up" on the graph. This makes it difficult to accurately
compare the two files. To solve this problem, the program allows you to shift one file relative to another so that the data from the two
files can be aligned.
NOTE: This feature is not active if the data files contain multiple laps. Since lap data requires accurate start and stop times, all the
lap data will automatically align properly.
To align two files, view both files on the Historical Graph by over-laying the Secondary File on the Primary File. Using the first cursor,
select a point from the Primary File (solid graph lines) that you want to use as the reference point.
This point can be any point on the primary graphs such when the vehicle speed first begins to rise or the maximum acceleration point
at launch (used in the example shown).
Catalog #91001, 91003, 91004, 91005, 91007, 91009
Rev. 9/06 - RS/mc Page 35 of 47
©2006 Edelbrock Corporation
Brochure #63-0282