Great Plains 606NT Material Rate - Manual (Page 21)

Great Plains Manufacturing, Inc. Table of Contents Main Box Rates Small Seeds Rate 19
2011-10-21 Table of Contents Main Box Rates 151-122B
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 material. Subtract initial weight of
container(s).
14. Divide the net material weight by three. Multiply by
number of openers on your drill, and then by ten, to
determine the total of pounds per acre applied.
15. Divide the desired original field rate by the measured
rate to calculate a scale adjustment factor.
16. Multiply the scale setting just used times correction
factor to obtain the next scale setting to use.
17. Set the Small Seeds Rate Handle to the new scale
setting.
18. 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).
19. Check that your tire(s) is (are) properly inflated. See
“Tire Inflation Chart” in Operator manual.
20. With calibration complete, store calibration crank,
re-engage hub if locked-out, reinstall any removed
chains or sprockets, reconnect seed hoses and re-
install acremeter (if removed - tighten only to snug).
When drilling, check seeding rate by noting acres drilled,
amount of seed added to drill and seed level in drill box.
If you are seeding more or less than desired, adjust rate
slightly to compensate for field conditions.
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
3P606NTcrank rotations for one tenth acre is:
91.3
Example:
the three containers weighed a total of
1.13 pounds after test: 0.43 lbs net
0.43 1.13 0.70 – = NetWeight GrossWeight ContainerWeights – =
Example: 10.0 lbs/ac
12.8
0.43
3
----------- 9 Ч 10 Ч = MeasuredRate
NetWeight
3
--------------------------- RowCount Ч 10 Ч =
Example: the target rate was 12 lbs/ac:
the correction factor =1.2
0.94
˙ 12
12.8
-----------
=
CorrectionFactor
FieldRate
MeasuredRate
-------------------------------------- =
Example: the previous scale setting was 60,
the next scale setting is 56
56 60 0.94 ×
=
NextScale PreviousScale CorrectionFactor Ч
=