Great Plains 2S-2600HDF Operator Manual v2 - Manual (Page 55)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 51
2014-02-03 Table of Contents Index 195-069M
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.
Set the Seed Rate Handle to the new scale setting.
12. 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).
13. Set the right drill section to match the now-calibrated
left section.
14. 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:
on the 42-row 7.5in drill:
36.4 lbs/ac
MeasuredRate
NetWeight
3
------------------------ OpenerCount Ч =
36.4
2.6
3
------ 42
Ч
=
For example:
the target rate was 49 lbs/ac, and the initial scale 40:
the new scale setting is:
54
NewScale
TargetRate
MeasuredRate
-------------------------------- OldScale Ч
=
53.8
49
36.4
--------- 40 Ч =