Great Plains 3S-4010HDF Material Rate User Manual
Page 24
Great Plains Mfg., Inc.
22
3S-4010HD and 3S-4010HDF
196-522B
01/29/2009
7.
Check that your gauge-wheel tires are 18-22.5 (445/
65 D22.5) NHS 16-Ply and properly inflated. See
“Tire Inflation Chart” in Operator’s manual.
8.
Record the weight of one to three empty containers
collectively large enough to hold seed metered for
6% of one acre.
9.
Place several pounds or kilograms of seed over
three seed cups on the outside end of the right drill
box. Pull lower end seed hoses off of these drops at
the opener end.
10. Turn crank several times to fill seed cups. Turn until
seed drops to ground from each hose.
11. Place empty container(s) under the three hoses to
gather metered seed.
12. Turn crank for one acre (45.1 rotations) or one hect-
are (111.4 rotations). While turning, check that cups
have ample seed coming into them.
13. Weigh metered seed. Subtract initial weight of con-
tainer(s).
14. Divide the net seed weight by the number of rows
sampled (3 in our example). Multiply by number of
openers on your drill to determine the total of
pounds-per-acre seeded.
15. The Seed Rate Handle scale is a percentage of
meter opening, and is quite linear near scale center.
Calculate a new scale setting based on the test.
Note: You may want to repeat calibration procedure 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).
16. Set the center and left drill sections to match the
now-calibrated right section.
17. With calibration complete, Reinstall fertilizer chain (if
removed), and reconnect seed hoses.
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.
For example:
three 8 oz. containers weigh at total of:
1.5 lb
For example:
the three containers weighed a total 1.82 lb. after test:
0.32 lb. net
0.32
1.82
1.5
–
=
NetWeight
GrossWeight
ContainerWeights
–
=
For example:
a 7.5in drill has 64 rows:
6.7 lbs/ac
6.7
0.32
3
---------
64
×
=
MeasuredRate
NetWeight
3
-------------------------
RowCount
×
=
For example:
new scale:
48
48
8
6.7
------
40
×
=
NewScale
TargetRate
MeasuredRate
---------------------------------
OldScale
Ч
=