VEGA VEGAPULS 45 VBUS - Manual (Page 14)

14 VEGAPULS 42, 44 and 45 – VBUS
Mounting and installation
Measuring range (operating range) and max. measuring distance
Note: Use of the sensors for applications with solids is limited.
full
Meas. range
max. measuring distance 20 m (type 45: 4 m)
3 Mounting and installation
3.1 General installation instructions
Measuring range
The reference plane for the measuring range
of the sensors is the flange face or the seal
shoulder of the thread. For measurements in
surge or bypass pipes with VEGAPULS 45
the max. measuring distance depends on the
tube length.
Keep in mind that in measuring environments
where the medium can reach the sensor
flange, buildup can occur on the antenna and
can cause measurement errors.
Note: The use of series 40 sensors for solids
is restricted.
Reference
plane empty
Profiles with flat surfaces cause stronger interfering
signals
Rounded profiles diffuse radar signals
A deflector causes signal scattering
max.
max.
max. filling
Interfering reflections
Flat obstructions and struts cause large
interfering reflections. They reflect the radar
signal with high energy density.
Rounded profile interfering surfaces scatter
the radar signals in all directions and thus
cause interfering reflections of lower energy
density. Hence, they are less critical than
reflections from a flat surface. If flat obstructions in the range of the radar
signals cannot be avoided, we recommend
diverting the interfering signals with a deflec-
tor. Through scattering, the interfering signals
will be low in amplitude and so diffuse that
they can be filtered out by the sensor.
max.
min. min.