VEGA VEGAVIB S 61 - Manual (Page 14)

2 .2
Principle of operation
Area of application
VEGAVIB S 61 is a level sensor with vibrating rod
for level detection.
It is designed for industrial use in all areas of
process technology and is used in bulk solids.
Typical applications are overfill and dry run
protection. Thanks to its simple and robust
measuring system, VEGAVIB S 61 is virtually
unaffected by the chemical and physical properties
of the bulk solid.
It functions even when exposed to strong external
vibrations or changing products.
Fault monitoring
The electronics module of VEGAVIB S 61 monitors
continuously the following criteria:
l
Correct vibrating frequency
l
Line break to the piezo drive
If one of the stated malfunctions is detected or in
case of power failure, the electronics takes on a
defined switching condition, i.e. the relay deener-
gises (safe condition).
Functional principle
The vibrating rod is piezoelectrically energised and
vibrates at its mechanical resonance frequency of
approx. 360 Hz. When the vibrating rod is
submerged in the product, the vibration amplitude
changes. This change is detected by the integrated
oscillator and converted into a switching command.
2 .3 Storage and transport
Packaging
Your instrument was protected by packaging
during transport. Its capacity to handle normal
loads during transport is assured by a test
according to DIN EN 24180.
The packaging consists of environment-friendly,
recyclable cardboard. In addition, the sensor is
provided with a protective cover of cardboard.
Dispose of the packaging material via specialised
recycling companies.
3 M ounting
3 .1
General instructions
Switching point
In general, VEGAVIB S 61 can be installed in any
position. The instrument simply has be mounted in
such a way that the vibrating element is at the
height of the desired switching point.
Moisture
Fig. 9: Measures against moisture penetration
Transport
Do not hold VEGAVIB S 61 on the vibrating
element. Especially with flange and tube versions,
the sensor can be damaged by the weight of the
instrument.
Remove the protective cover just before mounting.
Handling
The vibrating level switch is a measuring instru-
ment and must be treated accordingly. Bending the
vibrating element will destroy the instrument.
Warning:
The housing must not be used to screw the
instrument in! Applying tightening force can
damage internal parts of the housing.
Use the hexagon above the thread for
screwing in.
3 .2 Installation instructions
Socket
The vibrating element should protrude into the
vessel.
14 VEGAVIB S 61
Mounting
32796
-01
-080108