VEGA VEGAPULS 81 - Manual (Page 34)

34 VEGAPULS 64 and 81
False reflection
Flat installations and struts cause large false
reflections. They reflect the radar signal with
high energy density.
Mounting and installation: General installation instructions
Profiles with smooth interfering surfaces cause
large interfering signals
Round profiles diffusely spread the radar
signals
Cover flat profiles with scatting screens
Smoothed interfering surfaces have a diffuse
reflection of the radar signals and cause false
reflections with low energy density. Hence they
are more uncritical than reflections on flat
surfaces.
If flat installations in the range of the radar
signals cannot be avoided, it is recommended
to reflect the interfering signals with a scatter-
ing screen. Due to this scattering the interfer-
ing signals will be less energetic and diffuse
so that they can be filtered by the sensor.