Typical applications are overfill and dry run protection.With a
tuning fork of only 40 mm length,VEGASWING 61 can be also
mounted,e.g.in pipelines from DN 25.The small tuning fork
allows use in vessels,tanks and pipes.Thanks to its simple
and robust measuring system,VEGASWING 61 is virtually
unaffected by the chemical and physical properties of the
liquid.
It functions even under difficult conditions such as turbulence,
air bubbles,foam generation,buildup,strong external vibration
or changing products.
Fault monitoring
The electronics module of VEGASWING 61 continuously
monitors via frequency evaluation the following criteria:
lStrong corrosion or damage on the tuning fork
lloss of vibration
lLine break to the piezo drive
If a malfunction is detected or in case of power failure,the
electronics takes on a defined switching condition,i.e.the
output transistor blocks (safe condition).
The tuning fork is piezoelectrically energised and vibrates at its
mechanical resonance frequency of approx.1200 Hz.The
piezos are fixed mechanically and are hence not subject to
temperature shock limitations.The frequency changes when
the tuning fork is covered by the medium.This change is
detected by the integrated oscillator and converted into a
switching command.
VEGASWING 61 is a compact instrument,i.e.it can be
operated without external evaluation system.The integrated
electronics evaluates the level signal and outputs a switching
signal.With this switching signal,a connected device can be
operated directly (e.g.a warning system,aPLC,a pump etc.).
The data for power supply are stated in chapter "Technical
data"in the "Supplement".
3.3Operation
The switching condition of VEGASWING 61 with plastic
housing can be checked when the housing is closed (signal
lamp). In the basic adjustment,products with a density >0.7g/
cm³(0.025 lbs/in³)can be detected.The instrument can be
adapted if products with lower density should be measured.
Functional principle
Supply
VEGASWING 61 - - transistor (NPN/PNP)9
Product description
29225-EN-070614
