Gason 5030 Series, Operator'S Manual

Page: 21 / 80

Application Rate
Page 17
05/14
Application Rate Calibration Process
1. Refer to the Rate charts in the rear of the
manual to determine the most
appropriate gearbox ratio and door
setting for your particular application
rate.
Note: Always use the lowest gear
possible at the highest door setting to
minimise the loading on the gearbox.
2. Set ratio and door setting as per the
chart.
3. Place material in the hopper. You will
only need to cover the rear door area to
perform the calibration process.
4. Determine the bout width you will drive
at. The bout width is narrower than the
overall spread width (refer to
Spreading
Width for further details).
5. Refer to the Calibration Jockey Wheel
Turns table on page 18 to determine the
number of rotations required at the
jockey wheel to simulate 1/20
th
of a
hectare.
6. Place a bag or liner in the discharge area
at the rear of the spreader and prime the
feed chain with product.
Fig. G21 Collection tray in place after priming.
7. Once primed i.e. a level and even flow of
product across the feed chain to the drop
off area, clean the liner or tray out and
replace them for the actual test.
Fig. G22 Feed chain primed for calibration test.
8. Turn the jockey wheel the appropriate
number of turns to simulate 1/20
th
of a
hectare, or if the application rate is above
500kg/ha turn the handle 1/10
th
of the
stated handle turns.
Fig. G23 Rotating the Jockey wheel
Example
Spreading lime with an estimated bout width
of 10 metres. The number of jockey wheel
rotations in table G27 is 39.1 turns. Because
the application rate is above 500kg/ha we will
only rotate the jockey wheel 1/10
th
of the
standard turns (3.9 turns). This means that
when we have collected 1/200
th
of a hectare
sample and should multiply the sample weight
by 200 to determine the application rate per
hectare.