Vega VEGAPULS 11 - Page 15

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4 Mounting
VEGAPULS 11 • Two-wire 4 … 20 mA
58350-EN-200806
Fig.11:Coverat,large-areaproleswithdeectors
In liquids, direct the device as perpendicular as possible to the me-
dium surface to achieve optimum measurement results.
Fig. 12: Alignment in liquids
If there are agitators in the vessel, a false signal suppression should
be carried out with the agitators in motion. This ensures that the
interferingreectionsfromtheagitatorsaresavedwiththebladesin
dierentpositions.
Fig. 13: Agitators
Throughtheactionoflling,stirringandotherprocessesinthevessel,
compact foams which considerably damp the emitted signals may
form on the medium surface.
If foams lead to measurement errors, you should use the biggest pos-
sible radar antennas or sensors with guided radar.
4.3 Measurement setup - Flow
In general, the following must be observed while mounting the device:
Orientation
Agitators
Foam generation