Great Plains 3P600 Material Rate - Manual (Page 36)

34 3P500, 3P500V & 3P600 Table of Contents Main Box Rates Great Plains Manufacturing, Inc.
118-794B Table of Contents Main Box Rates 2011-10-21
Refer to Figure 9
5.
Place the hex socket of the crank on the left end of
the main jackshaft.
6. Pull the small seed hoses off the top of three opener
seed tubes, at the top of the openers. Place the
hoses into each sample container.
7. If not already done, set the Small Seeds Rate
Handle.
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, or for the number of rotations
from the table at right. 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.
Figure 9
Calibration Crank
32793
Calibration Revolutions
Example: on the 3P600 7.5 in. drill, planting alfalfa at
12 pounds/ac has an initial small seeds rate handle
setting of:
60
Drill Model Rotations Per ...
3P500 Acre Hectare
Crank 982 98.2 2427 243
Tire 1752 175 4329 433
Drill Model Rotations Per ...
3P500V Acre Hectare
Crank 982 98.2 2427 243
Tire 1752 175 4329 433
Drill Model Rotations Per ...
3P600 Acre Hectare
Crank 786 78.6 1942 194
Tire 1402 140 3464 346
32366
1 /
10
th ac. 1 /
10
th ha
1 /
10
th ac. 1 /
10
th ha
1 / 10
th ac. 1 / 10
th ha
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 =