CK 3000, CK 4000
19
After having carried out the adjustments it is advisable to carry out the calibration test in order to
ensure that the seed quantity is correct.
The number of turns in calibration test, which depend on the drill model, is given above the upper
left corner of the sowing chart in item ‘calibration test’.
11.
FIELD TEST
A field test is by far the most reliable way of doing a calibration test. By carrying out the field test the
effect of variations of tyre diameter to the sowing quantity can be taken into account. Measure up an
operating distance equivalent to one are, for small seeds 2 or 3 are, which for the 2 models in
question is as follows.
CK3000
CK 4000
Distance, 1 a
33,3 m
25 m
Distance, 2 a
66,7 m
50 m
Distance, 3 a
100 m
75 m
Drive the machine to the start of the distance. Place the calibration test troughs under the feeding
chambers. Rotate the drawing wheel some turns to make sure that the feeding chambers are
feeding. Empty the contents of the trough into the hoppers.
Lower the machine to its working position and drive over the measured distance. Weigh the amount
of seed collected in the trough and multiply it to give the rate in kg/ha.
Should adjustments prove to be necessary, proceed in the manner described in the calibration test.
NOTE! The manufacturer takes no responsibility for the effect of wheel dimension tolerances on the
sowing amount. An error can be proved by a field test. When sowing small seeds the vibration of
the machine during the operation can effect on the sowing amount. That is why carry out always the
field test when sowing small seeds, e.g. turnip rape and rape.
12.
ADJUSTING THE SOWING DEPTH
The sowing depth is adjusted by changing the spring loading of the coulters. This can be done either
individually or centrally (pictures 24 and 25)
