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7
Speed Calibration
The speed is calculated from the car's odometer pulse and needs to be calibrated
by the RetroGrabber software. After the initial factory calibration it is only necessary
to do a speed calibration when changing tires, e.g. changing from summer to winter
tires.
To do so, set up the system as described in chapter 6.2 on page 47 and drive along
a known reference distance. The street should be 5 – 10 km long and as straight as
possible, a motorway is best suited.
As all mileage and speed information is derived from that calibration, the
length of the reference distance must be as accurate as possible.
In the RetroGrabber software go to
Calibrate – Setup – Speed
Calibration. Click on New Calib.
Type in a name, then drive to the
start of the reference distance and
press Start. Do not stop, keep on
driving with a constant speed while
passing the start point.
When reaching the end of the
reference distance, press Stop while
passing the end point.
Type in the driven distance in meters
and press Accept.
Choose the new speed calibration
from the list and press Apply.
Page 57
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