Great Plains YP825AR Material Rate - Manual (Page 12)

8 YP825AR Table of Contents Metric Charts Great Plains Manufacturing, Inc.
401-923B Table of Contents Metric Charts 2013-11-11
Meter Pressurization
Refer to the Operator Manual for the procedure for fine
tuning meter pressurization. See page 84 for metric.
Start with pressures from below and on page 9, which
are based on crop, and for corn, seed shape and density.
Note: These are suggested initial (starting) pressures.
Adjust them up or down per the procedure in the
Operator Manual.
Corn: Reading a Pressure Chart (below, next page)
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: 3
Initial Meter Pressurization: Cotton
1.5 inches of water (any seed density)
Initial seed inlet Shutter: 2
Initial Meter Pressurization: Milo
1.5 inches of water (all disk, any seed density)
Initial seed inlet Shutter: 2
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: 2
Initial Meter Pressurization: Sunflower
Disk: 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 for desired population.
Initial seed inlet Shutter: 2
Initial Meter Pressurization: Round Corn
29725
( y )
Pressure/Seed Comparison
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
900 1100 1300 1500 1700 1900 2100 2300 2500 2700 2900 3100
Seeds Per Pound
Unit Weight (80K)
Linear (Round Corn Large)
Linear (Round Corn Small)
Meter Pressure (in/w
a
ter)
5
4.5
3.5
3
2.5
2
1.5
1
0.5
0
88.9 72.7 61.5 53.3 47.1 42.1 38.1 34.8 32.0 29.6 27.6 25.8
4 817-794C & 817-796C
Round Corn-Large
817-795C & 817-797C
Round Corn-Small
Meter Pressure (in/w
a
ter)
Disks
Disks
Example
Example
Meter Pressur
ization in inches of W
ater
Meter Pressur
ization in inches of W
ater
29725