GREAT PLAINS Air-Pro Manuel - Page 7

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Meter Pressurization

Meter Pressurization
Note: These are suggested initial (starting) pressures.
Higher or lower pressure adjustments can be
expected to maximize singulation.
Initial Meter Pressurization: Cotton
1.5 inches of water (any seed density)
Initial seed inlet Shutter: 3
Initial Meter Pressurization: Milo
1.5 inches of water (all disk, any seed density)
Initial seed inlet Shutter: 3
Initial Meter Pressurization: Soybeans
2.0 inches of water (84 cell disk, any seed density)
3.0 inches of water (168 cell disk, any seed density)
Initial seed inlet Shutter: 3
Initial Meter Pressurization: Sunflowers
817-851C Sunflower Oil Large
8500 seeds/pound (or fewer)
8500-7000 s/lb 1.25 inches of water
7000-5500 s/lb 1.75 inches of water
5500 s/lb and fewer 2.25 inches of water
Adjust pressure as needed to achieve desired population.
Initial seed inlet Shutter: 4
Null4:
5
Linear (Round Corn Large)
4.5
Linear (Round Corn Small)
4
Example
3.5
3
2.5
2
1.5
1
0.5
0
3100
2900
25.8
27.6
05/16/2019
Front Page
Initial Meter Pressurization: Round Corn
Pressure/Seed Comparison
Disks
817-795C & 817-797C
Round Corn-Small
2700
2500
2300
29.6
32.0
34.8
Front Page
Part Lists
Reading a Corn Pressure Chart
1. Pick the chart based on seed shape (flat, round).
Example: large round corn
2. Pick a line based on seed size (large, small).
Example: the right line below
3. Find the seed density on the bottom scale.
Example: 1260 seeds/pound
4. Read the suggested starting pressure on the left
scale, where the line (example shown as dotted
gray) intersects the density.
Example: 3.4 inches of water
Initial seed inlet Shutter for corn is: 5
(
y
2100
1900
1700
38.1
42.1
47.1
Seeds Per Pound
Unit Weight (80K)
Part Lists
Great Plains Manufacturing, Inc.
)
Disks
817-794C & 817-796C
Round Corn-Large
1500
1300
1100
53.3
61.5
72.7
7
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
900
88.9
Null4:
29725
29725
403-942M