14.1 Work Surface
For a correct photometric analysis, the device and the vehicle must be
positioned on a flat work surface.
The photometric analysis can also be performed on a slope, as long as the
device and vehicle are positioned on the same surface and the slope is equal
to or lower than 0.5%.
The results of the analysis are not reliable if the device and vehicle
are positioned on uneven or not perfectly flat surfaces.
90