Great Plains 606NT Material Rate - Manual (Page 8)

6 3P605NT, 3P606NT, 605NT & 606NT Table of Contents Main Box Rates Great Plains Manufacturing, Inc.
151-122B Table of Contents Main Box Rates 2011-10-21
7. If not already done, set the Drive Type, Seed Rate
Handle and Seed Cup Doors across the drill. If any
optional seed boxes are loaded, disconnect their
drive or set their rate to zero (unless you are
simultaneously calibrating multiple boxes).
8. Load seed above the rows to be sampled. Load well
more than the expected sample size.
9. Rotate the crank several turns to ensure that the
drives and seed cups are engaged, working properly,
free from foreign material, and that seed is flowing
steadily from the meters. Stop.
10. Note the current reading of the acremeter, unless
removed or you do not plan to rely on it for the
calibration.
11. Empty the sample containers back into the seed box,
and place them back under the three hoses to gather
metered seed.
12. Turn crank at a steady rate until one tenth acre is
tallied on acremeter. While turning, check that cups
have ample seed coming into them.
13. Weigh metered seed. Subtract initial weight of
container(s).
14. Divide the net seed weight by three. Multiply by
number of openers on your drill, and then by ten, to
determine the total of pounds per acre seeded.
15. The Seed Rate Handle scale is a percentage of
meter opening, and its effect is linear near scale
center. Calculate a new scale setting based on the
test.
Set the Seed Rate Handle to the new scale setting.
16. You may want to repeat calibration procedure at the
new setting if your results varied greatly from the
Seed Rate Chart, or if you must operate near the
ends of the Seed Rate handle scale (0-20 or
90-100).
Drill Model Rotations Per Acre (ha)
3P606NT
or 3P605NT
Crank: 913 (2256) rotations
3P606NT
or 3P605NT
Tire: 1628 (4015) rotations
606NT or 605NT Any: 995 (2459) rotations
Example: you desire to plant barley at:
60 pounds per acre
which is between
45 and 50
on the Drive Type 2 chart.
Use an initial Seed Rate Handle (InitialHandle) scale
setting of:
48
3P606NT crank rotations for one tenth acre:
91.3
Example: the containers weighed a total of 3.23
pounds after test:
1.73 lbs net
1.73 3.23 1.5 – =
NetWeight GrossWeight ContainerWeight – =
Example: MeasuredRate is:
52 lbs/ac
52
1.73
3
----------- 9 10 Ч Ч
=
MeasuredRate
NetWeight
3
--------------------------- OpenerCount Ч 10 Ч
=
Example:
the target rate was 60 lbs/ac, and the initial scale 48:
the new scale setting is:
55
55
60
52
------ 48 ×
= NewScale
TargetRate
MeasuredRate
--------------------------------------- PreviousScale Ч
=