Great Plains 3S-4010HDF Material Rate - Manual (Page 20)

Great Plains Mfg., Inc.
18 3S-4010HD and 3S-4010HDF
196-522B 01/29/2009
8. Place several pounds or kilograms of fertilizer over
three fertilizer openings at the outside end of the
right drill box. Pull lower end fertilizer hoses off of
these drops at the opener end.
9. Turn crank several times to fill flute cups. Turn until
fertilizer drops to ground from each hose.
10. Place empty container(s) under the three hoses to
gather metered fertilizer.
11. Turn crank for acre (45.1 rotations) or one hectare
(111.4 rotations). While turning, check that cups
have ample fertilizer coming into them.
12. Weigh metered fertilizer. Subtract initial weight of
container(s).
13. Divide the net fertilizer weight by three. Multiply by
number of openers on your drill to determine the
total of kg or pounds-per-acre applied.
14. Subtract to calculate the difference between the
measured rate and the original target (not adjusted)
rate.
15. If a Density Adjustment was made (see page 14),
apply it to the variance.
16. Consult the chart for the chart rate used for your first
calibration run with this material. If the just-measured
result was low, add the [adjusted] variance to the
previously used chart rate. If the measured result
was high, subtract the [adjusted] variance from the
previous chart rate.
17. Reset the fertilizer Range and Final Drive based on
the settings at the new chart rate.
18. You may want to repeat calibration procedure if your
results varied greatly from the desired target rate.
19. With calibration complete, Reinstall seed chain (if
removed) or reset Seed Rate Handle, reconnect
hoses, and lower gauge wheel to ground.
20. Set the center and left drill sections to match the
now-calibrated right section.
When drilling, check metering rate by noting acres
drilled, amount of fertilizer added to drill and level of
material in drill box. If you are applying more or less fertil-
izer than desired, adjust metering rate slightly to com-
pensate for field conditions.
!
CAUTION
Follow material supplier recommendations for safety precau-
tions in handling fertilizer.
For example:
the three containers weighed a total of 8.9 lb. after test:
7.4 lb. net
7.4 8.9 1.5 – =
NetWeight GrossWeight ContainerWeights – =
For example:
a 64-row (7.5cm) drill:
158 lb/ac
157.9
7.4
3
------ 64
×
=
MeasuredRate
NetWeight
3
------------------------- RowCount
×
=
For example: the target rate was 141 lb/ac:
variance=17
17 158 141 – =
Variance TargetRate MeasuredRate – =
For example: the density adjustment factor was 1.10:
new variance=19
19 17 1.1
×
=
AdjustedVariance Variance CorrectionFactor
×
=
For example:
Our measured rate was high, so we
subtract the adjusted variance (19)
from the previous adjusted chart rate (155)
to obtain a new adjusted chart rate (137).
This is close to:
LOW chart rate 137, and
HIGH chart rate 135.
Use either new drive setup:
Rate:
Range:
Driver:
Driven:
137
LOW
23T
13T Rate:
Range:
Driver:
Driven: 135
HIGH
12T
24T