Hardi HC5500, Instruction Book

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7 - Menu 3 Calibration
39
Menu 3.2 Flow calibration
Which method to use
The flow transducer can be calibrated theoretically or with two practical
methods. The practical methods are preferred. Calibration is done with
clean water. The Flow Tank method is time consuming, but is more
accurate than the Flow Nozzle method.
When changing to nozzles with more than a 100% increase or decrease
in output, it is recommended to recalibrate the flow transducer.
Calibration is recommended to be done at least once during the
spraying season. Use the chart at the back of the book to record the
values.
Menu 3.2.1 Flow constant
Use the navigation keys to change the flow constant theoretically.
Approximate PPU values for different flow housings are as follows in the
table. Different flow housings are designated by groove (A).
μ
ATTENTION! PPU indicates the number of pulses which theoretically come from the flow transducer whilst 1 litre of
liquid passes through.
Housing Housing identification (A) Flow range
L/min.
Orifice
mm
PPU
value
S/67 Three grooves 1-30 6
310.00
S/67 Four grooves 2.5-75 9.5
180.00
S/67 One outside groove 5 -150 13.5
120.00
S/67 No groove 10-300 20.0
60.00
S/67 Two outside grooves 35 - 600 36.0
17.00
Pressure drop over 13.5 mm orifice is 1 bar at 150 l/min.
CALIBRATION
Flow calibration
3.2
SPRAYER
Practical
3.2.1