Vaderstad Rapid RDA 400S, Instructions Manual

Page: 29 / 110

RDA 400-450 S
Ver.3 29.06.2007 29
Figure 2.34
!
For calibrations, be sure to use the supplied calibration bag. Prior to calibration, reset the scale
when the calibration bag is empty.
The bag should be pushed up under the seed box through the spring-loaded rate test hatch.
!
The drive wheel is released by removing the ring cotter from the upper cog wheel (output
shaft). Then mount the crank onto the shaft and lock it with the R-clip.
NOTE! Don't forget to
return the pin to its original position when the test is over.
Carry out a first calibration test to fill the feed rollers with seed. Empty the bag. The actual cal-
ibration test can now be carried out. Crank slowly and methodically, at around one turn per sec-
ond
!
Weigh the full test bag and make any adjustments necessary. The scale is practically linear,
making a procentual increase or decrease possible.
Example:
We want a sowing rate of 220 kg/ha wheat and set a scale reading of 50. The cali-
bration test gives a value of 200 kg/ha. We need to increase output by +10%, which would
mean a scale setting of 55.
!
When sowing with low gear, a full scale test must be carried out. Make 130 turns and weigh
the seed collected x 2. The collected amount x 2 is the sowing rate of the drill. If the amount
collected weighs 3 kg, the drill sowing rate is 6 kg/ha. A full scale test must be carried out when
sowing small amounts, 8 kg or less.
!
When sowing oilseeds: Check that the rapeseed brush is clean and adjust the brush with respect
to the cell wheel flaps
Check regularly that the sowing rate of the drill corresponds to the set value.
Figure 2.35 Figure 2.36
High gear. 12 test turns: Weighed amount of grain x 100 =________kg/ha.
Low gear. 26 test turns: Weighed amount of grain x 10 =_________kg/ha.
H= 12
L= 26