Great Plains 3P300 Operator Manual - Manual (Page 26)

22 3P300 S/N HH1113+ Great Plains Manufacturing, Inc.
500-103M-A 09/14/2009
Speed Calibration
3P300 sprayers may include a Raven SCS 440 control-
ler, and the SCS 440 requires a speed sensing input, a
new or existing wheel sensor or radar.
For a sprayer with an SCS 440, perform the speed cali-
bration procedure from the Raven SCS 440 manual, then
resume at “Rate Calibration” on page 23 in this manual.
For a sprayer without an SCS 440, use the following
steps.
1. Measure off a 200 foot (or 100 meter) course in the
area to be sprayed or in an area with similar surface
conditions.
2. Select the engine throttle setting and gear that will
be used when spraying. Allow ample approach dis-
tance to starting point so that tractor is at desired
speed at start marker. Allow ample overrun area so
that braking is not needed until exiting the course.
3. Hold the speed as you approach the “start” marker,
and check the time required to travel through the
course to the “end” marker.
4. Repeat the above procedure, and average the times
that were recorded. Use these equations to deter-
mine the trial ground speed.
Example:
27 seconds over a 200 ft course
Speed was: 5.05 mph
200 60 Ч
27 88 Ч
------------------- 5.05
=
TrialMPH
CourseFeet
60 ×
ElapsedSeconds
88 ×
-------------------------------------------------
=
TrialKPH
CourseMeters
3.6 ×
ElapsedSeconds
----------------------------------------------
=