74
8.
After the motor has been stopped with the white button the screen will show the expected
weight.
Then enter the ACTUAL weight dispensed using the keypad (fig. 14) and press
ENTER
to confirm
.
NOTE:
The heading will either be SEED / FERT / LEFT / RIGHT according to the drill setup
9.
Press
ENTER
again for the instrument to re-calculate and display the new calibration
factor in kg/rev, the error %, and the maximum forward speed that is permissible based on
the application rate set for the product (fig.15).
Figure 15
10.
Press
ENTER again to confirm and store
the new calibration factor, or press ESC to
return to the SETUP menu screen.
11.
This entire procedure should be repeated as many times as necessary until there is an
acceptable error. (2 – 3 times is normally sufficient)
It is recommended to reset the PART TOTAL to zero before commencing drilling. This will
enable you after drilling an area, to quantify any error in the calibration factor by logging the
theoretical amount of product used against a known amount used (a whole bag for example).
Roller selection
Before any calibration test is performed an appropriate roller must be selected. This selection should be
based on the required seed rate, working width of the drill as well as driving speed.
To ensure successful drilling, be sure to take into account the specific weight of the type of seed.
Figure 13
Figure 14
Fig 13 shows what the screen will
look like when the motor is turning
Umm, very
low. Is this
right
metering
roller
fitted??,
% difference
between the old and
new calibration
Check decimal
place and units.
When changing between seed
rollers the error % will be large,
but a second attempt will reduce
this.
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