VEGA VEGAPULS 54K enamel - Manual (Page 13)

VEGAPULS 54K enamel 13
24 101-EN-041227
> 10 mm
Correct and incorrect socket length
Correct Incorrect
Incorrect
Correct
Incorrect
Mounting on a vessel with parabolic tank top
< 10 mm
2.4 Common installation mistakes
Socket piece too long
If the sensor is mounted in a socket exten-
sion that is too long, strong false echoes are
generated which interfere with the measure-
ment. Make sure that the horn antenna pro-
trudes at least 10 mm out of the socket piece.
Parabolic effects on dished or arched
vessel tops
Round or parabolic tank tops act on the radar
signals like a parabolic mirror. If the radar
sensor is placed at the focal point of such a
parabolic tank top, the sensor receives am-
plified false echoes. The optimum mounting
location is generally in the range of half the
vessel radius from the centre.
1 /
2
radius
75 %
0 %
100 %
> 500 mm
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
Products tending to slight buildup can be
detected by using a measuring tube with
150 mm nominal width or more. In a measur-
ing tube of this size, buildup does not cause
any problems.
Correct Incorrect