Great Plains 2510HDF Operator Manual - Manual (Page 43)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 39
2013-11-11 Table of Contents Index 288-340M
8. Rotate gauge wheel until one acre has been tallied
(see table on page 30). Simulate field speed.
Note: You can also rotate the gauge wheel jackshaft by
means of a wrench or socket, on the drill side that
does not have the acremeter. If turning the gauge
wheel jackshaft, count tire rotations, as the axle
and jackshaft sprockets are not 1:1.
9. Check that the three seed cups have ample seed
coming into them.
10. Weigh metered seed.
11. Subtract initial weight of container (tare weight).
12. Divide by three.
13. Multiply by the number of openers on your drill to
determine total pounds seeded per acre.
14. If this figure is different than desired, set your
fertilizer rate adjuster accordingly.
Note: You may want to repeat the calibration procedure if
your results vary greatly from the rate chart.
When drilling, check material rate by noting acres drilled,
amount of material added to drill and material level in drill
box. If you are applying more or less than desired, adjust
rate slightly to compensate for field conditions.
From table, rotations per acre is:
268
For a 20-foot drill, tire rpm for 5 mph is:
66
Assume container plus material weighs:
7.3 pounds
SeedWeight:
7.3 - 1.1 = 6.2
PoundsPerCup:
6.2
÷ 3 = 2.1
PoundsPerAcre:
2.1 x 24 = 49.6
Actual Target was 60 pounds per acre.
Result is 17% low.
Change adjuster up by 8.5 (17% of 50)
to a Fertilizer Rate Adjuster setting of:
59
SeedWeight TotalWeight ContainerWeight – =
PoundsPerCup
SeedWeight
3
----------------------------- =
PoundsPerAcre PoundsPerCup OpenerCount
Ч
=