Great Plains 3P1006NT Material Rate - Manual (Page 26)

24 3P1006NT Table of Contents Main Box Rates Great Plains Manufacturing, Inc.
151-144B Table of Contents Main Box Rates 2011-10-21
14. Turn crank at a steady rate for the number of turns
specified on page 3 or page 4, or until one acre or
hectare is tallied on acremeter. While turning, check
that cups have ample seed coming into them.
15. Weigh metered seed. Subtract initial weight of
container(s).
16. Divide the net seed weight by three. Multiply by
number of openers on your drill to determine the
total of pounds per acre seeded.
17. If the calibration sample is more than a few percent
different than the desired FieldRate, pick a new chart
rate based on the difference factor.
18. Find the chart rate closest to NewChart. Change the
Final Drive sprocket and Drive Type as needed. If the
correction went off the Standard chart to the low
side, consider installing the Rate Reduction kit.
19. You may want to repeat calibration procedure at the
new setting if your results varied greatly from the
Seed Rate Chart.
When drilling, check the amount of seed you are using
by noting the acres drilled, amount of seed added to drill,
and the level of seed in the box. If you suspect you are
drilling more or less seed than desired, and you have
accurately calibrated the drill to your seed, you may need
to change your sprocket arrangement to compensate for
your field conditions.
3P1006NT s/n A1067W+ crank rotations for 1 acre,
Drive Type 2, Standard transmission:
140.2
Example: the containers weighed a total of 4.35
pounds after test. NetWeight is 2.85 pounds.
2.81 4.31 1.5 – = NetWeight GrossWeight ContainerWeight – =
Example: MeasuredRate is:
14 lbs/ac
14.0
2.81
3
----------- 15 ×
=
MeasuredRate
NetWeight
3
--------------------------- OpenerCount × =
Example:
TargetRate = 13
PreviousChart = 13.2
MeasuredRate = 14
The new chart rate is:
NewChart = 12.0 pounds per acre
The nearest Standard chart rate to 12.2 is 12.0, or
Drive Type: 2
Final Sprocket: 22T
Alternatively, you could use the Reduced Rate chart,
which has a 12.1 rate setting at Drive Type 3.
12.2
13
14
------ 13.2 × =
NewChart
TargetRate
MeasuredRate
--------------------------------------- PreviousChart Ч
=