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HE-VA Auto-Controller AC-Lite - May 2016
4.4 'Autocal' Speed Calibration
Auto-calibrate in field conditions for
maximum accuracy.
1. Place two markers 100 metres apart and position
some reference point on the tractor (e.g. the cab step)
opposite the first marker.
2. Select the forward speed channel.
3. Press and hold the CAL button until the cal
factor appears on the display. (7.8)
4. Continue holding the CAL button and press
the Ha>0 button.
The display will show "AUtO" ready to start the test run (fig. 7).
5. Drive up to the second marker and stop exactly
opposite the marker. The instrument counts and
displays the pulses received from the speed sensor
over the measured distance.
NOTE: The instrument only displays up to 9999.
Beyond this number of pulses it displays the
first 4 digits of a five-digit number, however the
pulses are still being counted internally.
Press the Ha>0 button (fig. 8).
The calibration factor is automatically calculated
and stored in memory.
The instrument then returns to the normal
display mode.
14
3
2
Figure 7: Start AutoCal
5
100 metres
Figure 8: Stop Autocal
4
6
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