Fig. 22. Calibration test trough locked in place
Fig. 23 Calibration test trough ready for test
Turn the crank as many times as mentioned in the sowing charts at the drill model in question.
Weight the seed delivered to the calibration test troughs. If the crank was turned as many times as
correspond to an are, you get the seed quantity for a hectare by multiplying the result with a
hundred. For small seeds carry out the calibration test so that the turns of the hand wheel correspond
to 2-3 ares sowed area which means double or triplicate turns. The weighing result must be
multiplied correspondingly by 50 or 33.
If the result of the calibration test stays under or goes over the aimed value the feeding is decreased
or increased on the hand wheel. E.g. with wheat one notch of the hand wheel corresponds to about
5.5 kg/ha or a whole turn to approx. 55 kg/ha.
After having carried out the calibration test put the troughs back in place.
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Pull the supporter backwards
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Place the hooks of the calibration test through under the supporter of the cones
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Turn up the calibration test trough by using the hooks of the troughs as hinges. While
turning the supporter is to be in its rearmost position
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Push the upper edge of the trough under locking springs. The springs lock the trough and
keep the cones in place.
Keep the crank in a good place, e.g. on the sieve.
