Chapter 3 SPAN Operation
OEM7 SPAN Installation and Operation User Manual v14
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Figure 25: Rear View of PwrPak7-E1 – Mounting Plate is not Flat
Figure 26: Side View of PwrPak7-E1 – Vehicle is not Level
Figure 27: Top View of PwrPak7-E1 – PwrPak7-E1 Misalignment
The misalignments shown in the previous figures have been exaggerated for illustration purposes.
In a typical SPAN system installation, the slight misalignments shown in the examples above are hard to detect
and difficult to measure. For this reason, it is recommended that a Body to Vehicle Frame rotation calibration
routine be used so the SPAN system can determine and compensate for these angles. Refer to
Frame Rotation Calibration Routine
on page 102 or
Multi-Line Body to Vehicle Frame Rotation Calibration
on page 103 for more information.
These parameters are estimated in the background when the system is fully converged, however it is always bet-
ter to have this measured as precisely as possible before mission critical data is collected.