VEGA VEGAPULS 43 4 … 20 mA; HART compact sensor - Manual (Page 11)

VEGAPULS 43 – 4 … 20 mA 11
26626-EN-041227
Mounting and installation
Measuring range (operating range) and max. measuring distance
Note: Use of the sensors for applications with solids is limited.
3 Mounting and installation
3.1 General installation instructions
Profiles with smooth interfering surfaces cause large
false signals
Round profiles diffuse radar signals
Cover smooth, flat surfaces with deflectors
False echoes
Flat obstructions and struts cause strong
false echoes. They reflect the radar signal
with high energy density.
Interfering surfaces with rounded profiles
scatter the radar signals into the surrounding
space more diffusely and thus generate false
echoes with a lower energy density. Hence,
those reflections are less critical than those
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. The deflector prevents the interfering
signals from being directly received by the
radar sensor. The signals are then so low-
energy and diffuse that they can be filtered
out by the sensor.
full
Meas. range
Reference plane empty
max.
max.
min.
Measuring range
The reference plane for the
measuring range of the sensor
is the lower edge of the flange.
Keep in mind that in measuring
environments where the me-
dium can reach the sensor
flange, buildup may form on
the antenna and later cause
measurement errors.
Note: The series 40 sensors
are suitable for measurement
of solids only under certain
conditions.