12.1
12 - Testing and fine tuning
Testing and fine tuning
Fine tuning the flow constant - PPU
Calibration of the flow transducer is carried out with clean water but small changes may occur when adding pesticides or
fertilizer. This will effect the final readings. This is typically noted when the volume displayed on the display does not equal
the actual known volume that was sprayed out. The formula below can be used to “fine tune” the flow transducer PPU.
For example, the spray tank is filled with 1000 gallons of spray liquid.
When sprayed out, the display showed a total of 900 gallons. (Original PPU = 485.0)
Note the relation is inverse:
•
To raise the displayed volume, the PPU is lowered.
•
To lower the displayed volume, the PPU is raised.
Pin & Wire connection
AMP Super Seal
Box
Color coding
1
Negative
Black
2
Positive
Brown
3
Signal
Blue
New PPU
Original PPU
Displayed Volume
×
Sprayed Volume
-------------------------------------------------------------------------------
=
New PPU
485.0 PPU
900 Gallons
×
1000 Gallons
----------------------------------------------------------
436.5 PPU
=
=
Содержание ISOBUS VT
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