01 ] Flow Calibration - Theoretical - Hardi 3570 Manual

Calibration of flow transducer
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 Tank method
in menu 02 is more time consuming, but is more accurate than the
Nozzle method in menu 03.
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.

[ 01 ] Flow calibration - theoretical

During theoretical flow calibration in menu 01, the number of pulses
P P U P P U
per unit [
indicates the number of pulses which theoretically come from the flow
transducer whilst 1 litre of liquid passes through.
Method
1. Open menu 01.
2. Use arrow key to adjust PPU value.
3. Use accept key to close the menu and
return to the main display picture.
Approximate PPU values for different
flow housings are as follows:
BK housing
EC housing
EC housing for S/67
EC housing
White colour code =13.5 mm / 5/8" orifice.
Black colour code = 20.0 mm / 7/8" orifice.
Keystrokes
0 1
] are shown on the display. For example, [
colour code Metric
white 120.0 PPU
white 118.0 PPU
white 128.0 PPU
black 59.0 PPU
HARDI PILOT
US gal.
455.0 PPU
447.0 PPU
485.0 PPU
223.0 PPU
HARDI PILOT
L
L 1 2 0 . 0 L 1 2 0 . 0
t H E O
01
Set
HARDI
P P U
120.0
Set
HARDI
]
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