9.5 - Verifying the product flow-rates
The product flow-rate verification should be done, in relationship to the desired amount of
product (kg/ha) based on the sample amounts collected in the trays. Knowing that 1/ha equals an
2
2
2
area of 10,000m , and the trays have a total area of 2m (each tray has area of 0.25m ).
:
9.6 - Adjusting the vanes
. Thus, when the
scale numbers are greater, so will the job width, also the shorter vanes will distribute product
primarily in the center rows (internal) of the distribution foot-print, while the longer vanes will
distribute on the outer edges of this foot-print. Vane adjustment should done for every type of
product, so that the uniformity of the product distribution will not be compromised .
Example:
You intend on distributing 2,500 kg/ha of limestone. What is the exact adjustment and what
is the
weight to be collected on the trays to equalize the system?
1st
- Adjust the machine and distribute on both rows of trays, according to the previous instructions.
Collect the product of the 8 sample trays and weigh it (ex. 0.8 kg).
Use the following guidelines to calculate:
Pb = V x 2 (kg)
10,000
Where:
Pb
: weight value to be collected (kg)
V
: required distribution rates (kg/ha)
2
2
: area with 8 trays (m )
10000
: equals 1ha
Calculate:
Pb = 2500x 2 = 0.5 (kg)
10,000
Explanation:
The explanation for the calculation results is as follows, note that the flow-rate of 2500kg/ha
is necessary for the collection of the 8 trays to have a weight of 0.5 kg. As is with this example, the
collected value was 0.8 kg, thus we conclude that the floodgate opening should be reduced and a
new sampling should be done, until the rate of 0.5 kg is attained.
The vanes are adjusted in relationship to the scales shown on the discs
sample
On pages 30 to 43 there are reference values for vane adjustments, in relation to the
product to be applied.
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