VEGA VEGAPULS 56V - Manual (Page 37)

VEGAPULS 56V 37
Pipe antenna: The surge pipe open to the bottom
must have a ventilation or a compensation hole.
Correct Wrong
Mounting and installation
A deflector provided at an angle of > 45
°
avoids in case of products with small relative
dielectric constant that the vessel bottom is
detected as level instead of the medium.
Ventilation holes
Pipe antenna systems must be provided with
a ventilation hole at the upper end of the
surge pipe. A missing hole will cause wrong
measurements.