Great-plains YP2425A Material Rate User Manual download pdf (Page 10)

8 YP2425A Table of Contents Metric Charts Great Plains Manufacturing, Inc.

401-626B Table of Contents Metric Charts 2012-02-29

Meter Pressurization

Refer to the Operator Manual for the procedure for ﬁne

tuning meter pressurization.

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.

Use the seed monitor console to adjust them up or

down per the procedure in the YP2425A 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: 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

8500 seeds/pound (or fewer):

Adjust pressure as needed for desired population.

Initial seed inlet Shutter: 2

Initial Meter Pressurization: Round Corn

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

29725

(y)

Pressure/Seed Comparison

0.5

1.5

2.5

3.5

4.5

900

11001300

150017001900

2100

23002500

27002900

3100

Seeds Per Pound

Unit Weight (80K)

Linear (Round Corn Large)

Linear (Round Corn Small)

Meter Pressure (in/water)

4.5

3.5

2.5

1.5

0.5

88.9

72.761.5

53.347.142.138.134.832.0

29.627.6

25.8

817-794C & 817-796C

Round Corn-Large

817-795C & 817-797C

Round Corn-Small

Meter Pressure (in/water)

Disks

Example

Meter Pressurization in inches of Water

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 69 70

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Great-plains YP2425A Material Rate User Manual Page 10

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