Great Plains YP4425A Material Rate - Manual (Page 66)

62 YP3025A, YP4025A and YP4425A Table of Contents Great Plains Manufacturing, Inc.
401-627B Table of Contents 2014-05-13
Meter Pressurization - Metric
Meter pressurization in U.S. customary units begins on
page 9. Refer to the Operator Manual for the procedure
for fine tuning meter pressurization.
Start with pressures from below and on page 63, which
are based on crop, and for corn, seed shape and density.
Note: These are suggested initial (starting) pressures.
Use the seed monitor console to adjust them up or
down per the procedure in the YP3025A,
YP4025A and YP4425A Operator Manuals.
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: 2800 seeds/kg
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: Canola and Cotton
1.5 inches of water (any seed density)
Initial seed inlet Shutter: canola (1.5), cotton (2)
Initial Meter Pressurization: Milo
1.5 inches of water (all disk, any seed density)
Initial seed inlet Shutter: 1
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
18700 seeds/kg (or fewer)
18700 - 15400 s/kg
1.25 inches of water
15400 - 12100 s/kg 1.75 inches of water
12100 s/kg and fewer 2.25 inches of water
Adjust pressure as needed for desired population.
Initial seed inlet Shutter:2
Initial Meter Pressurization: Sunflower
Refer to charts beginning on page 77.
29725
Round Corn (U.S. Customary Units)
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
6800 6400 6000 5500 5100 4600 4200 3700 3300 2900 2400 2000
Overlay for
31441 Seeds Per Kilogram 29725
Example
Example
Meter Pressur
ization in inches of W
ater
Meter Pressur
ization in inches of W
ater
Initial Meter Pressurization: Round Corn