Great Plains YP1630F-1670 Material Rate - Manual (Page 31)

Great Plains Manufacturing, Inc. Contents Appendix Treatment Rate (Option) 29
2012-12-04 Contents Appendix 401-832B
10. Weigh the empty plastic bags. Record this number
for use at step 22. The sum of these weights is the:
BagWeights
Collect A Treatment Sample
Refer to Figure 15 on page 28
11. At the sampling rows identified in step 3, wearing
suitable protective equipment, remove the
diffuser
.
12. Securely attach an empty plastic bag to the tube.
Refer to Figure 16
13. Set the treatment meter dials
to the initial setting
from the charts, or the NextDial setting to be sampled.
Make a note of this setting, as it is needed in
calculations.
14. Start the tractor. Accelerate briskly to field speed.
Stop at the end of the course.
15. Set the dials to “00” on the sampled rows, to prevent
further material from dribbling into the sample bags.
16. Wearing suitable protective equipment, remove,
weigh and record the weight of the sample bags.
Empty each bag back into its hopper.
Calculate the Treatment Rate
The examples used are based on the application
example data from page 27, and the empty bag weights
from step 10.
17. Remove and weigh all the sample bags. This is the:
GrossWeight
18. Determine net weight of metered material.
19. Determine the net weight per row:
20. Use a scaling factor to determine the TestRate :
70 cm Hectare scaling factor: 14.29
×
30 inch Acre scaling factor: 17.42
×
21. Determine the percent deviation (a correction factor):
22. Use the correction factor to determine the next dial
setting to test:
23. If the deviation is less than 1.5%, or within your own
allowable tolerances, calibration is complete.
Otherwise, run another test, using the calculated
NextDial setting, starting at step 12.
Metric Example: USc Example:
SampleCount (number of rows to sample):
3 3
Empty sample BagWeights :
0.010 kg (10 grams) 0.022 lbs
4
1
Note: If any material flowed, then stopped, when setting
the dials, return that material to the hopper, then
re-secure the bag.
Figure 16
Treatment Meter Dial
34452
1
Metric Example: USc Example:
GrossWeight :
2.854 kg 2.109 lb.
TotalNetWeight :
2.854 - 0.010
= 2.844 kg 2.109 - 0.022
= 2.087 lb
RowNetWeight :
2.844
÷ 3
= 0.948 kg
2.087
÷ 3
= 0.696 lb
TestRate :
0.948 × 14.29
= 13.5 kg/ha
0.696 × 17.42
= 12.1 lb/ac
Deviation :
13.5
÷ 12.8
= 0.94 (94%, 6% high)
12.1
÷ 11.4
= 0.94 (94%, 6% high)
NextDial :
52 Ч 0.94
= 49
52 Ч 0.94
= 49
TotalN etWeight GrossWeight BagWeights – =
RowNetWeight
TotalNetWeight
SampleCount
---------------------------------------- =
TestRate RowNetWeight ScalingFactor
×
=
Deviation
TargetRate
TestRate
--------------------------- =
NextDial PriorDial Deviation
Ч
=