VEGA VEGAPULS 43 Profibus PA - Manual (Page 25)

VEGAPULS 43 – Profibus PA 25
Direct sensor vertically to the product surface
Correct Incorrect
Ladder
Ladder
Wrong orientation to the product
Weak measuring signals are generated if the
sensor is not directly pointed at the product
surface. Orient the sensor axis perpendicu-
larly to the product surface to achieve opti-
mum measuring results.
3.5 Common installation mistakes
Socket piece too long
If the sensor is mounted in a socket exten-
sion that is too long, strong false echoes
arise which interfere with the measurement.
Make sure that the horn antenna projects out
of the socket piece.
Flange antenna: Correct and unfavourable socket
length
75 %
0 %
100 %
Strong product movements
Strong product movements
Strong turbulence in the vessel, e.g. caused
by powerful stirrers or strong chemical reac-
tions, can seriously interfere with the meas-
urement. A surge or bypass tube (see
illustration) of sufficient size always enables
reliable and problem-free measurement even
if strong turbulence occurs in the vessel,
provided there is no product buildup in the
tube.
Mounting and installation
Correct Incorrect
Correct
Unfavourable