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The flow transducer can be calibrated theoretically or with two practical
methods. For the sake of accuracy, the practical methods are pre-
ferred. Practical calibration is done with clean water. The Flow Tank
method is more 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 re-calibration the flow transducer.
Calibration is recommended to be carried out at least once during the
spraying season.
Use the chart at the back of the book to record the values.
Flow constant
To change the flow constant theoretically.
During theoretical flow calibration the number of pulses per unit are
shown on the display.
For example, [ 120.0 PPU ] indicates the number of pulses which
theoretically come from the flow transducer whilst 1 litre of liquid
passes through. Approximate PPU values for different flow housings
are as follows:
Housing Code for Flow range PPU Orifice
housing l/min value mm
BK White 5 - 150 105.0 13.5
BK & EVC One outside groove 5 - 150 120.0 13.5
BK Black 10 - 300 60.0 20.0
EC White 5 - 150 118.0 13.5
EC Black 10 - 300 59.0 20.0
EC S/67 One outside groove 5 - 150 128.0 13.5
S/67 Two outside grooves 35 - 600 125.0 36.0
FLOW CALIBRATION
Flow constant
FLOW CONSTANT
xxx.x PPU
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