afriso Unitop Notice Technique page 34

Product description
EN
4.3 Function
The product measures the hydrostatic pressure at the tank bottom to deter-
mine the level. The hydrostatic pressure depends on the level and the density
of the stored liquid. The pressure is measured approximately 20 mm above
the tank bottom and indicated on the dial.
Pneumatic pressure is generated in the pressure line by pulling out and push-
ing back the pump plunger. The pressure line consists of the measuring line
(from the measuring instrument to the tank) and the vertical line (inside the
tank). The pneumatic pressure displaces the liquid from the vertical line.
When the pneumatic pressure is equal to the hydrostatic pressure acting at
the tank bottom, the liquid is fully displaced from the vertical line. Bubbles
start to escape at the lower end of the vertical line. In this condition, the
pointer has reached the maximum deflection and remains at the indicated
value.
The product enables consumption monitoring and timely re-fuelling. The tank
lorry driver can use the product to verify prior to filling whether the ordered
volume fits into the tank.
It is recommended to use the mounting kit Pneumofix type 2, see chapter
"Spare parts and accessories".
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Unitop