Great Plains 3N-4020 Operator Manual User Manual
Page 57
Great Plains Manufacturing, Inc.
Hydraulic Drive Operation
53
2013-10-29
196-359M
Refer to Figure 73
8.
The display shows the error or difference between
the traveled distance and the distance calculated by
the Controller.
Refer to Figure 74
9.
If this is the first time the unit has been calibrated,
this error can be large. Accept the new speed cali-
bration and re-run the course. Re-calibrate until the
error is within 5%. The cab console gives you the
option each time you calibrate of accepting the new
settings, or keeping the previous setting.
Speed calibration results, once accepted by you, are
stored until changed, and are not lost when power is
removed.
10. When planting, check the speed displayed against
the tractor speedometer or other reference. If they
disagree by more than a few percent, perform
another speed calibration.
Figure 73
Distance Variance
28271
Figure 74
Save/Ignore Result
28272