MacDon FD75 OM - Manual (Page 147)

OPERATION
4. At the top of the calibration window is a description
of the item to be calibrated. Below that, there is a
description of the calibration conditions and procedure.
Follow the steps as described in the window. As you
proceed through the calibration process, the display
will automatically update to show the next step.
For example, when the delay says “First press ENTER,
then pulse header down switch”, you should press
ENTER, and then press the header down key.
Pressing the ESC key in one of the steps will cause the
calibration procedure to stop.
Not reacting to the system within three minutes, will
cause the calibration procedure to stop.
NOTE:
Refer to combine operator’s manual for an
explanation of any error codes.
Figure 4.191: Combine Display
5. When all steps have been completed, “Calibration
successful” is displayed on the screen.
Leave the
calibration by pressing the ENTER or ESC key.
6. If unit does not function properly, conduct the maximum
stubble height calibration.
NOTE:
If float was set heavier to complete ground
calibration procedure, adjust to recommended
operating float after the calibration is complete.
Maximum Stubble Height Calibration
This is necessary to know from which height the area counter should stop or start counting. When the header is
raised before this level the area counter assumes you are not cutting crop. You have to put the header at a certain
height you will always exceed when not cutting and at a certain height you will always stay below when cutting.
Select the height of the header that corresponds to the description above.
IMPORTANT:
• If the value is set too low, area may be counted since sometimes the header is raised above this threshold
although the combine is still cutting.
• If the value is set too high, the area counter will keep cutting even when the header is raised (but below
this threshold) and the combine is not cutting crop any more.
To calibrate the maximum stubble height, proceed as follows:
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