Hardi HC5500 User Manual

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13 - 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
fertiliser. 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 below formula can be used to “fine tune” the flow transducer PPU.
For example, the spray tank is filled with 2400 litres of spray liquid.
When sprayed out, the display showed a total of 2300 litres. (Original PPU = 120.0)
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
2 Positive Brown
3Sig.Blue
1 Negative Black
NewPPU
Original PPU Displayed Volume×
Sprayed Volume
----------------------------------------------------------------------------------=
NewPPU
120PPU 2300Litres×
2400Litres
---------------------------------------------------- 115 0 PPU,==

Hardi HC5500 Specifications

General

Brand	Hardi
Model	HC5500
Category	Controller
Language	English