VEGA VEGAPULS 56V - Manual (Page 42)

42 VEGAPULS 56V
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Direct sensor vertically to the product surface
Correct Wrong
Ladder
Ladder
Mounting and installation
Horn antenna: Correct and wrong socket length
Correct Wrong
Wrong
Mounting on a vessel with parabolic tank top
Correct
~ 1 /
2
vessel
radius
Wrong
>10 mm
4.5 Installation fault
Socket piece too long
When mounting the antenna in a too long
socket piece, strong false reflections are
caused, aggravating the measurement. Note
that the horn antenna protrudes at least
10 mm out of the socket piece.
Wrong directing to the product surface
A directing of the sensor which does not
point to the product surface will cause weak
measuring signals. If possible, direct the
sensor axis vertically to the product surface,
to reach optimum measuring results.
Parabolic effects on dished boiler head
or basket arch vessel
Round or parabolic tank tops act for the
radar signals like a parabolic mirror. If the
radar sensor is placed to the focus of such a
parabolic tank top, the sensor receives am-
plified false echoes. The optimum mounting is
generally in the range of the half vessel ra-
dius from the centre.
10 mm