VEGA VEGASON 51K…53K - Manual (Page 24)

24 VEGASON 51K … 53K
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If possible, provide a vertical directing of the
sensor axis to the product surface and
avoid, if possible, struts within the 100 %-
beam, e.g. by tubes and struts.
Min. distance, max. measuring range and span (example VEGASON 51, 52 and 53)
4 m (type 51), 7 m (type 52), 15 m (type 53)
4 Mounting and installation
4.1 General installation instructions
Measuring range
You select your instrument according to the
required measuring range, as well as other
criteria. The reference planes for the min. and
max. distance to the product or the solid is
either the transducer surface (diaphragm) or,
Mounting and installation
on instruments with flange version, the instru-
ment flange. (Note the information for the
reference planes in chapter "Dimensions“).
The max. filling is dependent on the required
min. distance of the instrument used (0,25 m
to 1,4 m) and the installation place of the
instrument or the transducer.
Full
Span
Min.
distance
1m
Empty
Min.
distance
Min.
distance
0,25 m 0,4 m 0,75 m
Reference plane
Type 51 Type 53 Type 52
Beam angle and false echoes
The ultrasonic impulses are focussed by the
transducer. The impulses leave the trans-
ducer in conical form similar to the beam
pattern of a spotlight. The beam angle is 5,5°
(VEGASON 51/52) or 3° (VEGASON 53) at
-3 dB emitted power.
Any object in this beam angle causes a false
echo. Within the first few metres of the beam
angle, tubes, struts or other installations
cause strong false echoes. At a distance of 6
m the false echo of a strut has 9-times more
amplitude than at a distance of 18 m.
max. meas. range