KL 2500/3000
25
If the test is carried out simultaneously with seed and fertilizer a plastic sheet or similar
must be placed under the fertilizer coulters. The fertilizer flowing out through the
coulters falls down on to the sheet. Rotate the crank a couple of turns in order to get the
feeding chambers filled properly. Empty the test troughs and place them back under the
feeding chambers.
Turn the crank as many times as mentioned in the sowing chart at the drill model in
question. The speed of rotation must correspond with normal operation speed (approx.
2 turns per sec.). Weigh the seed and fertilizer delivered to the calibration test troughs
and on the sheet. If the crank was turned as many times as correspond to the machine,
the seed quantity for a hectare can be calculated by multiplying the result with a
hundred.
The obtained results may differ from the desired results because of ordinary variations
in fertilizer and seed batches:
•
If the results obtained differ excessively from the desired feed results, the feed
amounts must be made more accurate by rotating the hand-wheel
•
The feed adjustment must be increased or reduced by as many percentage
points as the weighed calibration test amount exceeded or fell below the desired
level
•
The above can be presented as follows:
•
If we then insert sample figures into the formula above:
Desired fertilizer feed amount = 650 kg/ha
Feed amount based on calibration test = 600 kg/ha
Hand-wheel adjustment used in calibration test = 6.5
Corrected value according to formula = (650/600) x 6.5 = 7.0
Caution! The given calculation formula is intended to simplify
the determination of correct adjustment. The end result must
however always be checked with a calibration or field test if
an accurate end-result is desired!
Caution! The calculation example given above is for reference
only, and is only intended to demonstrate the use of the
calculation formula.
