VRT Hydraulic Drive
– Calibration
Page 75
05/06
6.
Go to the ‘RATES’ screen either directly
from the ‘RECORDS’ screen or from the
‘MENU’ screen:-
a) Select the bin to calibrate (Bin number
1) by highlighting the appropriate zone
and using the up or down navigator
keys.
b) Select product for that bin (WHEAT). It
is possible to edit or add new product
names from the ‘PRODUCT’ screen
c) Input application rate (70 kg/ha).
d) Input increment steps (5 kg/ha).
e) Go to calibration page by pushing the
soft key to the left of CALIB PROD
prompt.
Fig. VC3 Rates Screen.
7. When in the calibration screen (refer
Fig.VC4) you will need to set the
following:-
a)
‘CAL SPEED’. This is the speed at
which the metershaft rotates during the
calibration test (1-10). Refer Table VC6.
The
default setting is 4
. The higher the
setting the faster the speed.
b)
‘TEST PULSES’. The number of pulses
to run the test (generally 250 for cereals
and fertiliser, 600 for Canola). The
bigger the sample the better.
c) When complete push the soft key under
the ‘READY’ prompt before leaving the
cab. Test pulses will now be displayed
as zero and will record feedback from
the seeder.
Fig.VC4 Product Calibration Screen.
8. To begin calibration procedure at the
seeder:-
a)
Engage tractor’s hydraulic circuit to run
the air seeder. The fan should not run
because the flow control valve at the fan
is turned off.
b) Remove the meterbox hatch on the bin
being tested.
c) Fit the calibration sample tray to the
bottom and rear of the meterbox.
d) Prime the system to ensure that the new
product
is
fully
surrounding
the
meterwheels. To do this, push the green
button on the calibration control box on
the seeder. Allow meterwheels to rotate a
couple of revolutions.
PUSH THE RED
BUTTON TO STOP
. This will stop the
meter system and
zero the ‘TEST
PULSES’ count when the green button is
next pushed.
Fig.VC5 Calibration control box.
e) Empty sample tray and refit for the full
calibration run.
Page
2
Calibration Speed Settings (
Default setting 4
)
Low application rates
2kg/ha
– 20 kg/ha
2-3
Medium application rates
20kg/ha
–120 kg/ha
4
High application rates
120kg - above
5-7
Table VC6