Main box seed rate calibration – Great Plains 2S-2600HDF Operator Manual v2 User Manual
Page 54
50
2S-2600HD
Great Plains Manufacturing, Inc.
195-069M
2014-02-03
Main Box Seed Rate Calibration
Differences will exist between the tested seed and field
conditions used to generate the Seed Rate Charts, and
your seed and conditions. To accurately achieve your tar-
get population, Great Plains recommends calibrating.
Perform the calibration with the drill raised for transport,
but with the opener frames lowered (if the openers are
raised, the clutches disengage). Leave the tractor
hitched for movement control. Block the tires not being
used in the calibration.
1.
Rotate the gauge wheels and check that the drives
and seed cups are engaged, working properly and
free from foreign material. If not already done, set
the Drive Type, Seed Rate Handle and Seed Cup
Doors across the drill. If fertilizer is loaded, remove
the fertilizer drive chain (unless you are simulta-
neously calibrating fertilizer rate).
2.
Note the current reading of the acremeter, unless
you do not plan to rely on it for the calibration.
3.
Check that your gauge-wheel tires are 9.5Lx15 6-ply
Rib Implement and properly inflated. See “Tire Infla-
tion Chart” on page 104.
4.
Record the weight of one to three empty containers
collectively large enough to hold seed metered for
6% of one acre.
5.
Place several pounds of seed over three seed cups
on the outside end of the left drill box. Pull lower end
seed hoses off of these drops at the opener end.
6.
Turn gauge wheel several times to fill seed cups.
Turn until seed drops to ground from each hose.
7.
Place empty container(s) under the three hoses to
gather metered seed.
8.
Turn gauge wheel until one acre is tallied on acreme-
ter (203 wheel rotations). While turning, check that
cups have ample seed coming into them.
9.
Weigh metered seed. Subtract initial weight of con-
tainer(s)
Crushing Hazard:
You may be severely injured or killed by being crushed from a
falling implement or openers. Always have transport locks in
place and frame sufficiently blocked up when working on the
drill.
For example:
on a drill with a row spacing of:
7.5in
and row count of:
42
you desire to plant barley at:
49 pounds per acre
which, from the chart, is an initial Seed Rate Handle
scale setting of:
40
For example:
three empty 1.8 pound containers weigh:
5.4 lbs
Gauge wheel rotations for one acre:
203
For example: the containers weighed a total of 8.0
pounds after test:
2.6 lbs net
NetWeight
GrossWeight
ContainerWeights
–
=
2.6
8.0
5.4
–
=