Gason Pasture Planter, Assembly/Operators/Parts Manual

Page: 26 / 106

VRT Hydraulic Drive
– Calibration
Page 22
10/09
Fig. 27 Rates Screen.
7. When in the calibration screen (refer Fig.28)
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 30. 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 600 for Pasture
Planter). 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. 28 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) Open the bottom door on the Pasture Planter
meterbox.
c) Fit the calibration sample bag to the bottom
of the Pasture Planter 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. 29 Calibration control box.
e) Empty sample bag and refit for the full
calibration run.
9. Push the green button to start calibration
test.
10. Allow system to stop by itself. If the sample
bag fills or a larger sample is required,
change the ‘TEST PULSES’ setting at
monitor. It will be necessary to go back one
screen and re-enter the Product Calibration
screen before making changes to the ‘TEST
PULSES’ value. Push ‘READY’ prompt again
and re-run test at the seeder.
11. After a correct sample run, weigh the sample
of product using the scales supplied with the
seeder.
NOTE: It is the responsibility of the
operator to check the accuracy of the
scales on a regular basis.
Page 2
Calibration Speed Settings ( Default setting 4 )
Low application rates 2kg/ha
– 4 kg/ha
2-3
Medium application rates 4kg/ha
–10 kg/ha
4
High application rates 10kg - above 5-7
TABLE. 30