23
OS 170 Fertilizer Spreader OM
Set-up and Operation
Spread Pattern Test (Cont’d)
Spread Pattern Recording
The material collected in the pans will be measured in the
Spread Pattern Test Results sheet found on page 22
and will reveal the spread pattern. This data can be used
to make adjustments to the machine, if necessary, based
on the results.
Before entering the test pattern results, be sure to fill
out the information requested such as location, serial
number, etc. This information, along with the results, can
be filed for future reference when completed.
NOTE:
Keep the original Spread Pattern Test Results
sheet in this Owner’s Manual and use a
photocopy for writing down the information and
recording the test results.
Pan
0
Pan
L1
Pan
L2
Pan
L3
Pan
L4
Pan
L5
Pan
L6
Pan
L7
Pan
L8
Pan
R8
Pan
R7
Pan
R6
Pan
R5
Pan
R4
Pan
R3
Pan
R2
Pan
R1
Using the funnel, empty the contents of each pan into
its corresponding vial, starting with the L8 pan and vial.
Measure the weight of the material in each vial using a
scale. Record the weight for each vial in its proper square
on the Test Pattern Results sheet.
NOTE:
Although each vial has marks for measure, the
most reliable method for measurement is by
weight as granular fertilizer components can
settle with some irregularity.
Graphing the Test Results
Spread Pattern Test Results
Recorded Vial Readings
0
L1
L2
L3
L4
L5
L6
L7
L8
R8
R7
R6
R5
R4
R3
R2
R1
0
L1
L2
L3
L4
L5
L6
L7
L8
R8
R7
R6
R5
R4
R3
R2
R1
50 ft.
Driving Interval
50 ft.
Driving Interval
X X X X X X X X X X X X X X X X X
Example
0
0
L1
L1
L2
L2
L3
L4
L4
R
R3
R2
R2
R1
R1
m ee
pl
p
m
mple
m ee
pl
p
m
mpleee
pl
p
m
m
mpleee
pl
plee
llee
xa
Ex
50 ft.
5 t
Driving Interval
After all of the data has been entered on the Spread
Pattern Test Results sheet, graph the results (see
example above). Compare the shape of the graph to the
following illustrations.
C
D
D
B
A
Any symmetrical spread pattern of these dimensional
characteristics is acceptable.
A - Application rate of centerline.
B - One half of application rate at centerline.
C - Driving interval width.
D - One half of driver interval width.
Acceptable patterns will deliver one half of the desired
application rate at distance equal to one half driving
interval from centerline. This point will be at the middle
of the overlap.
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