Commissioning 7
74
Evaluate the results and correct if necessary:
Pool the contents of the collecting vessels placed one after another and pour
them into the measuring tubes from the left-hand side.
The quality of the horizontal spreading pattern can be read off the three meas-
uring tubes.
Figure 7.26: Possible results of pass
[A] All tubes contain the same amount.
[B] Asymmetrical fertiliser distribution
[C] Too much fertiliser in the overlap zone
[D] Too little fertiliser in the overlap zone
Examples of spreader setting corrections:
Test re-
sult
Fertiliser distribution Action, test
Case A Even distribution (admis-
sible deviation ±1 scale
line)
Adjustments are correct.
Case B Fertiliser quantity de-
creases from right to left
(or vice versa).
Are the same drop points set on the right
and left side?
Is the metering slide setting on the left
and right side the same?
Tramline distances the same?
Tramlines parallel?
Was there a strong side wind during the
test?
Case C Too little fertiliser in the
centre.
Select earlier drop point setting (e.g.
change drop point from 5 to 4).
Case D Too little fertiliser in the
overlap zones.
Select later drop point setting (e.g.
change drop point from 8 to 9).
A
100%
B
100%
C
100%
D
100%
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