Mounting And Installation; General Installation Instructions - Vega VEGASON 51K Operating Instruction

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,
Type 51
Min.
distance
0,25 m
Min. distance, max. measuring range and span (example VEGASON 51, 52 and 53)
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.
24
Min.
distance
Full
Empty
0,75 m
1m
4 m (type 51), 7 m (type 52), 15 m (type 53)
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.
Type 53
Reference plane
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.
Mounting and installation
Type 52
Min.
distance
0,4 m
VEGASON 51K ... 53K