VEGA VEGAPULS 51V…54V - Manual (Page 5)

VEGAPULS 51 V … 54 V 5
Product description - Function
Radar signals react to two electrical primary
quantities:
- the electrical conductivity of a substance.
- the dielectric constant of a substance.
All products which are electrically conductive
reflect radar signals very well. Even only
slightly conductive products ensure a
sufficient reflection for a reliable
measurement.
All products with a dielectric constant figure
ε
r
of more than 2,0 reflect radar impulses
sufficiently (note: air has a dielectric constand
figure
ε
r
of 1).
The signal reflection increases with the
conductivity or with the dielectric constant
figure of the product. Hence virtually all
products can be measured.
ε
Reflected radar power dependent on the
dielectric constant figure of the measured
product
Due to the standard flanges from DN 50 to
DN 250, ANSI 2" to ANSI 10" or G 1
1 /
2
A and
1 1 /
2
" NPT the sensor antenna systems are
adapted to the various measured products
and measurement environments.
High-quality materials withstand also
extremely chemical and physical conditions.
The sensors deliver reliably, precisely and
longterm stable, reproducible analogue or di-
gital level signals.
Continuous and reliable
Unaffected by temperature, pressure and
individual gas atmospheres, VEGAPULS
radar sensors are used for quick and reliable
continuous level measurement of various
products.
VEGAPULS 50 enable level measurement
with radar sensors on systems where radar
sensors had not been used before due to
price reasons.
Temperature influence: Temperatur error
absolutely zero (e.g. at 500°C 0,018 %)
Pressure influence: Error with pressure
increase very low (e.g. at 50 bar 0,8 %)
100 500 1000 1300 °C 0
0
0,01
0,02
0,03
%
0,018 %
0,023 %
10
0
0
5
%
0,8 %
3 %
10
50
20 30 40 60
100
70 80 90 110 120 130 140
bar