KROHNE OPTISOUND 3020C 2wire EN - Manual (Page 16)

Guided radar is not influenced by foam generation and is
particularly suitable for such applications.
If there are strong air currents in the vessel, e.g. due to strong
winds in outdoor installations, or because of air turbulence, e.
g. through cyclone exhausting, you should mount OPTI-
SOUND 3020 C in a standpipe or use a different measuring
principle, e.g. radar or guided radar (TDR).
By using a standpipe (surge or bypass tube), the influence of
vessel installations, foam generation and turbulence is
excluded.
Standpipes must extend all the way down to the requested
min. level, as measurement is only possible within the tube.
max.
min.
1
Fig. 14: Standpipe in a tank
1 Vent hole ø 5 … 10 mm
OPTISOUND 3020 C can be used from tube diameters from
50 mm.
Avoid large gaps and thick welding joints when connecting the
tubes. Generally carry out a false echo storage.
Measurement in a standpipe is not recommended for very
adhesive products.
Air flow
Standpipe measurement
16 OPTISOUND 3020 C - 4 … 20 mA/HART
Mounting
30507
-EN
-050914