VEGA VEGASON 63 4 … 20 mA_HART - two-wire - Manual (Page 15)

15
4 Mounting
VEGASON 63 • 4 … 20 mA/HART - two-wire
28777-EN-130417
Fig. 12: Agitators
Do not mount the instruments in or above the filling stream. Make sure
that you detect the product surface, not the inflowing product.
Fig. 13: Inflowing liquid
Through the action of filling, stirring and other processes in the vessel,
dense foams which considerably damp the emitted signals may form
on the product surface.
If foams are causing measurement errors, the sensor should be used
in a standpipe or, alternatively, the more suitable guided radar sen-
sors (TDR) should be used.
Guided wave radar is unaffected by foam generation and is particu-
larly suitable for such applications.
If there are strong air currents in the vessel, e.g. due to strong winds
in outdoor installations or air turbulence, e.g. by cyclone extraction
you should mount VEGASON 63 in a standpipe or use a different
measuring principle, e.g. radar or guided radar (TDR).
Inflowing medium
Foam
Air turbulences