VEGA VEGAPULS 68 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART four-wire - Manual (Page 24)

be a place where no installations cross the microwave signals. Make
sure when planning your measurement loop that the radar signals
have a "clear view" to the product.
I
n case of existing vessel installations, a false echo storage should be
carried out during setup.
I f large vessel installations such as struts or supports cause false
echoes, these can be attenuated through supplementary measures.
S
mall, inclined sheet metal baffles above the installations scatter the
radar signals and prevent direct interfering reflections.
Fig. 15: Cover smooth profiles with deflectors
T o avoid strong buildup and dust in the antenna system, the sensor
should not be mounted directly at the dust extraction of the vessel.
Tip:
I
n case of extreme dust in the antenna system, VEGAPULS 68 is
available with rinsing connection e.g. for air. The air is distributed via
channels in the antenna system and keeps it virtually free of dust.
Fig. 16: Purging air connection with horn antenna
Air purging
24 VEGAPULS 68 • 4 … 20 mA/HART four-wire
4 M ounting
29262
-EN
-090305