Great Plains 3N-4020 Operator Manual - Manual (Page 55)

Great Plains Manufacturing, Inc. Table of Contents Index Hydraulic Drive Operation 51
2013-10-29 Table of Contents Index 196-359M
Speed Calibration
In order to fine-tune the default speed calculation or to
convert to radar speed signal, the controller may be cali-
brated as follows:
1. Set two flags 400ft apart (100 meters if in metric
mode).
Refer to Figure 67
2. To calibrate the Controller for speed, press the
FUNCTION button until the screen at right appears.
Refer to Figure 68
3. Press the ⇑ Up arrow button to initiate new speed
calibration routine.
Press the ⇓ Down arrow button to restore factory
default setting.
Refer to Figure 69
4. This is the first window that appears in Speed Cali-
bration mode. Press FUNCTION button to accept, or
⇑ button to change units of measure.
ENGLISH (U.S. Customary) speed units are:
mph (miles per hour)
METRIC speed units are:
kph (kilometers per hour)
If you change units of measure for speed calibration,
it also changes units for seed rate. Numeric values
entered or previously computed are not converted.
Be sure to review all screens before planting.
Figure 67
Speed Calibration Mode
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Figure 68
Initiate Speed Calibration
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Figure 69
U.S. Customary Units
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