7.3
Setting of pressure-maintenance function (Counterpressure)
The pressure-maintenance function generates a counterpressure which:
n
prevents siphoning empty of the product tank
n
enhances metering accuracy with a free outlet
n
prevents undesired emptying of the metering line
Rotary Knob A must be in the "Right-hand stop" position to permit correct
setting.
The base value set can be increased by turning Rotary Knob A using an Allen key
(size: S5), (Fig. 8, Item 2) counterclockwise and lowered by turning it clockwise.
Fig. 8: Setting of pressure-maintenance function
1
Pressure-maintenance function (Rotary Knob "A")
2
Allen-type adjusting screw
Commissioning / Operation
3
Turn in this direction to increase pressure (+)
4
Turn in this direction to reduce pressure (-)
29
417101434 Rev. 5-05.2019