MSD 7531 Programmable Digital-7 Plus Installation - Manual (Page 16)

16 INSTALLATION INSTRUCTIONS
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Figure 6 Acquisition Charts.
ACQUISITION
The Programmable Plus Ignition Control can provide you with 18 seconds of ignition data during
each pass with 2 seconds leading to the launch. Samples are taken by the microprocessor every
10-milliseconds. (The data can be averaged in the Analysis Box by choosing Average.) After a pass,
you can recall a variety of parameters to view as they occurred during the pass such as shift points,
retards, MAP, rev limits, the number of times the rev limiter is activated and more. After each pass,
the file can be saved so it can be stored and reviewed with other runs.
With the laptop connected to the ignition after a pass, turn the ignition On and go to the Launch
History window. (The Launch History window is listed as Plot 4 in the View pull down menu.) Click
on the Transfer pull down menu then select Acq to Plot. This brings the recorded information to the
screen where it can be saved to the PC by clicking File, then Save As. Note that the numbers on the
left side of the screen are arbitrary and there to provide a division between the spaces. The numbers
that go across the top of the chart are seconds and begin at two seconds prior to the launch.
After saving the file, it can only be opened and viewed in the History File 1 screen (there are four). If
this screen is not up, go to the View pull down menu on the Graph View chart and select History File
1-4 to allow opening up to four different acquisition file windows.
Click Here
to Select
the Trace
Boxes
Seconds of
Run Time
LAUNCH HISTORY WINDOW
After a pass, save this info as a
file to your PC to view it in the
History Window.
HISTORY FILE WINDOW
Use this chart to view an
acquisition file.
Arbitrary
Numbers
Turn Traces
On or Off
Set a
Traces
Function
Here
Choose the traces you want
to view in the History File by
clicking the On box. Click and
drag each title to the Analyze
Window to view its function.
Click this column to alter colors of each trace.
Input Your
Total Timing
Full Scale Value. This is a
reference for the full scale of
the data. It can be unique or
matched to other traces.