14.5 - 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 ).
:
14.6 - 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
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