ISTRUZIONI PER L’OPERATORE
Pagina 6
4. Procedure to Calculate the Weight in the Hopper When Specific Weight is Giv-
en (only for electronic machines without weighing system)
It is necessary to fill it with the maximum possible precision up to the “1000” reference
(that indicates the known volume of 1 litre) with the same fertilizer that will be used.
Afterwards the user shall weigh the filled in bottle by using a precision scale with at
least a 10-gram accuracy (see Fig. 14).
From the measured value it shall be deducted the tare of the bottle indicated on the
label on the bottle itself, and the result will be the specific weight of the product in use.
After loading it is advisable to level the product in order to read the filling level thanks to
the adhesive measurement labels applied inside the hopper or the extensions if
mounted (see Fig. 13)
The adhesive measurement labels indicate the level in litres, so in order to know the
quantity of the product inside the hopper in kilos it is necessary to multiply the value in
litres visually observed in the hopper by the measured specific weight.
Example:
Reading the adhesive measurement labels
550 litres (see fig. 13)
Detected Specific Weight: :
Gross Weight – Tare
1,278 – 0,04 = 1,238kg/dm
3
Weight of the product inside the hopper:
550 x 1,238 = 681 kg
This procedure determines the weight value to be entered on the machine monitor.
During the spreading it will be possible to check if the weight of material in the hopper is
correct. To do this is important to use the graduated scales into the hopper. Read the
value of the liters in the hopper by leveling the fertilizer and use the specific weight to
obtain the kg. If the weight value on the monitor and the kg obtained from the
calculation were different, the following procedure must be performed:
Do theoretical work for 1 Ha. Stop the tractor when 1 Ha is treated on the display.
Data to read from display:
-
kg at the start of theoretical work (at the beginning)
-
kg at the end of theoretical work (at 1 ha worked)
Data to read from hopper:
-
liters at the start of work (at the beginning)
-
liters at the end of work (at 1 ha worked)
