Great Plains Air-Pro Meter Ultra Test Stand Kit - Manual (Page 20)

20 Great Plains Manufacturing, Inc. Front Page Part Lists Air-Pro
®
Ultra Test Stand Kit
403-533M Front Page Part Lists 09/27/2011
Meter Pressurization - Metric
Note: These are suggested initial (starting) pressures.
Use the seed monitor console to adjust them up or
down per the procedure in the Meter Stand Opera-
tor 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: 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: 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: 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
6800 6400 6000 5500 5100 4600 4200 3700 3300 2900 2400 2000
Overlay for
31441 Seeds Per Kilogram 29725
Example
Example
Null4:
Meter Pressur
ization in inches of W
ater
Null4:
Meter Pressur
ization in inches of W
ater