- 47 -
6.6
FIELD TEST FOR DOSAGE (models with
mechanical transmission)
The field test to verify the dose that the machine will dis-
tribute can only be performed for models with mechanical
transmission. If differences appear between the test and the
dose actually distributed by the machine, for example, due
to very uneven or very soft ground, or tyres with low pres-
sure, etc., an experimental test can be carried out to deter-
mine the
NUMBER OF ACTUAL TURNS
to be made with the
TRANSMISSION WHEEL
.
Fig. 6.71
1-
With the help of a tape measure, mark on the plot the dis-
tance in metres indicated in the following table:
MACHINE TYPE
METRES TO
BE TRAVELLED
600
41.7
680
36.8
700
35.7
770
32.5
2-
Make a mark on the tyre to make it easier to count wheel
turns while moving (Fig. 6.72).
Fig. 6.72
Fig. 6.72
3-
Travel the aforementioned distance with the seed drill in
working position. This will give the true number of turns
to be made in the flow pre-test. By performing the test
with this number of turns, we will obtain the kilograms
per hectare actually dispensed by the machine.
IF THERE IS A LARGE DIFFERENCE BETWEEN
THE TURNS OBTAINED IN THE FIELD TEST AND
THE TURNS INDICATED (SECTION 6.5 FLOW PRE-
TEST), MAKE SURE THAT THE TRANSMISSION
WHEEL IS IN CONTACT WITH THE FLOATING
WHEEL AT ALL TIMES.
Summary of Contents for VESTA-2813 NS PLUS
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