Vega VEGAPULS 62 Operating Instructions Manual page 24

4 Mounting
Foam generation
Mounting in the vessel
insulation
24
Fig. 16: Agitators
Through the action of filling, stirring and other processes in the vessel,
compact foam can form on the product surface, damping the emitted
signals considerably.
If foams are causing measurement errors, the biggest possible radar
antennas, the electronics with increased sensitivity or low frequency
radar sensors (C band) should be used.
As an alternative, sensors with guided microwave can be used. These
are unaffected by foam generation and are best suited for such ap-
plications.
Instruments for a temperature range up to 250 °C or up to 450 °C
have a distance piece between process fitting and electronics hous-
ing. Ths distance piece is used for thermal decoupling of the electron-
ics against high process temperatures.
Information:
The spacer may only be incorporated up to a maximum of 50 mm into
the vessel insulation. Only then is a reliable temperature decoupling
guaranteed.
VEGAPULS 62 • Profibus PA