KUHN AXERA-M, Operator'S Manual

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Calculation using the calibration slide rule
Position the 300kg/ha figure below the 18m figure on the working width scale and
then read off the value for kg/min above 8km/h on the speed scale; 72kg/min will be
the required mean fertilizer quantity for both shutter outlets.
Output figures for a selection of application rates and tractor speeds are already pro-
vided in the spreading charts.
4.2 Carrying out the calibration check
When working with the fertilizer spreader in the raised position, make
sure that it is safely supported on blocks under the frame. ( Accident
danger.)
♦
Turn the disc by hand on the side chosen to undertake the calibration check until
the disc vanes are at right angles to the direction of travel.
♦
Slide the gearbox rearwards and remove both discs.
♦
Adjust metering slide according to information given in the spreading charts and
lock securely in place using the handlock nut.
♦
Place a bucket under the shutter outlet.
♦
Engage PTO shaft and set speed to 540 rpm.
♦
Open the corresponding open/close shutter slide.
♦
An output of kg/min must be obtained. Preferably allow a full 60 seconds during
the test but as this may involve a greater quantity of fertilizer than the bucket will
hold a time of 20 to 30 seconds can be used. However, remember to multiply the
result accordingly to obtain a theoretical minute.
♦
Weigh the amount collected, remembering to subtract the weight of the bucket.
♦
If the actual weight differs from the guideline figures given in the spreading
charts, alter the position of the metering slide and repeat the calibration check.
Note: The metering slide scale is laid out proportionally, which allows the metering
slide to be altered to compensate any difference obtained in the application rate.
e.g.:
If 10% too little fertilizer is collected when the metering slide is in position
400, select a new position of 400+10% = 440, and lock securely in place.
You may need to repeat the process several times before the correct applica-
tion rate is achieved. Remember, actual weight measured must be half of the
application rate required as only one half of the total width is used for the
calibration check.