VEGA VEGASON 54K…56K - Manual (Page 4)

4 VEGASON 54K … 56K
Product description
1 Product description
1.1 Function
Continuous level measurement with ultrasonic
sensors is based on the running time meas-
urement of ultrasonic pulses.
VEGASON series 54 … 56 sensors are a
newly developed generation of extremely
compact ultrasonic sensors for level meas-
urement. They were developed for liquids
and especially for solids and larger measur-
ing ranges. Preferred areas of application
are silos, bunkers or material heaps.
Due to the small housing dimensions and
process fittings, the compact sensors are a
very reasonable solution for your level meas-
urement applications. With the integrated
display and a special sensor intelligence, in
conjunction with large measuring ranges,
they can be used for applications in which
the advantages of a non-contact measure-
ment could never before be realized.
The instruments produce an analogue
4 … 20 mA output signal.
Measuring principle
Piezoceramic high performance transducers
emit focused ultrasonic pulses which are
reflected by the product surface. The meas-
urement electronics prepares a precise im-
age of the environment from the reflected
ultrasonic pulses. The transducers work both
as transmitter and receiver. As receiver, the
transducers are high-sensitivity piezo micro-
phones.
emission - reflection - reception
Meas. dis-
tance
The measurement electronics precisely cal-
culates the distance between transducer and
medium from the speed of sound and the
measured running time of the emitted sound
pulses. The distance is then converted into a
level-proportional signal and made available
acc. to sensor settings as a precise, cali-
brated level value.
Since the speed of sound is subject to tem-
perature influence, the transducer also con-
tinuously detects the ambient temperature,
so that the level is precisely measured even if
the ambient temperature varies.
Output signal
The level-proportional measurement signal is
made available as 4 … 20 mA output signal.
The analogue 4 … 20 mA signal is freely
programmable and reflects the measuring
range, i.e. the adjusted operating range, of
the sensor.