VEGA VEGAPULS 51V…54V - Manual (Page 26)

26 VEGAPULS 51 V … 54 V
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Meas. range (operating range) and max. meas. distance
Note: The use of the sensors in solid applications is restricted
4 Mounting and installation
4.1 General installation instructions
Measuring range
The reference pane for the measuring range
is the flange face (type 53/54) or the seal
shoulder of the thread (type 51/52). The max.
measuring range is 0 … 20 m, dependent on
the sensor type. The min. distance to the
medium must be 5 cm.
For measurements in surge or bypass pipes
(pipe antenna), the max. meas. distance is
reduced.
Note that for measurements where the
medium reaches the antenna, build-up on the
antenna is possible which can cause
measurement errors.
False reflections
Flat obstructions and struts cause large false
reflections. They reflect the radar signal with
high amplitude.
Round profile interfering surfaces have a dif-
fuse reflection of the radar signals and cause
false reflections with low 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, it is
recommended to reflect the interfering
signals with a deflector.
Profiles with smooth interfering surfaces
cause large false signals
Due to this scattering the interfering signals
will be low in amplitude and diffuse so that
they can be filtered out by the sensor.
Mounting and installation - General installation instructions
Meas. range
max. meas. distance 20 m
empty full Reference pane
Max.
Max.
Max.
Max.
Type 53
Type 54 Type 51/52 Type 54