Fertilizer rate calibration – Great Plains 2S-2600HDF Operator Manual v2 User Manual
Page 60
56
2S-2600HD
Great Plains Manufacturing, Inc.
195-069M
2014-02-03
Fertilizer Rate Calibration
Differences will exist between the tested fertilizer and
field conditions used to generate the Rate Chart, and
your fertilizer and conditions. To accurately achieve your
target application, 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 will 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 Range and Final Drive for the left section. If seed
is loaded, remove a seed drive chain or set the Seed
Rate Handle to 0 (unless you are simultaneously cal-
ibrating seed and fertilizer rates).
2.
Note the initial reading on 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 fertilizer metered for
6% of one acre.
5.
Place several pounds of fertilizer over three fertilizer
openings the outside end of the left drill box. Pull
lower end fertilizer hoses off of these drops at the
opener end.
6.
Turn gauge wheel several times to fill flute cups. Turn
until fertilizer drops to ground from each hose.
7.
Place empty container(s) under the three hoses to
gather metered fertilizer.
8.
Turn gauge wheel until one acre is tallied on acreme-
ter (203 wheel rotations). While turning, check that
cups have ample fertilizer coming into them.
9.
Weigh metered fertilizer. Subtract initial weight of
container(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:
you desire to apply 65 lb/cu-ft material at a rate of:
78 pounds per acre
on a 7.5in row spacing drill with a row count of:
42
Per the table, the drive system setup is:
Low Range
21T Driver
16T Driven
Gauge wheel revolutions per acre:
203
For example:
three empty 1.8 pound containers weigh: 5.4 lbs
Possible Chemical Hazard: Follow material supplier recom-
mendations for safety precautions in handling fertilizer.
For example:
the three containers weighed a total of 11.3 pounds after
test: 5.9 lbs net
NetWeight
GrossWeight
ContainerWeights
–
=
5.9
11.3
5.4
–
=