Great Plains 2S-2600HDF Operator Manual v2 - Manual (Page 63)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 59
2014-02-03 Table of Contents Index 195-069M
9. Weigh metered seed. Subtract initial weight of con-
tainer(s).
10. Divide the net seed weight by three. Multiply by num-
ber of openers on your drill to determine the total of
pounds-per-acre seeded.
11. 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).
12. Set the right drill section to match the now-calibrated
left section.
13. With calibration complete, Reinstall fertilizer chain (if
removed), reconnect seed hoses, and lower gauge
wheel to ground.
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:
the three containers weighed a total 2.3 lbs after test:
0.8 lbs net
NetWeight GrossWeight ContainerWeights – =
0.8 2.3 1.5 – =
For example:
a 7.5in drill has 42 rows:
11.2 lbs/ac
MeasuredRate
NetWeight
3
------------------------ RowCount
Ч
=
11.2
0.8
3
------ 42 Ч =
For example:
new scale:
45
NewScale
TargetRate
MeasuredRate
-------------------------------- OldScale Ч =
44.6
10
11.2
--------- 50 Ч =