VEGA VEGAVIB 55 - contactless electronic switch - Manual (Page 9)

It functions even when exposed to strong external vibration or
changing products.
Fault monitoring
The electronics of VEGAVIB 55 continuously monitors 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 contactless electronic switch opens (safe
condition).
The tuning fork is piezoelectrically energised and vibrates at its
mechanical resonance frequency of approx. 150 Hz. When the
tuning fork is submerged in the product, the vibration
amplitude changes. This change is detected by the integrated
oscillator and converted into a switching command.
VEGAVIB 55 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, a PLC, a pump etc.).
The data for power supply are stated in chapter "Technical
data" in the "Supplement".
3.3 Operation
VEGAVIB 55 can detect products with a density >0.08 g/cm³
(0.003 lbs/in³).
On the electronics module you will find the following indicating
and adjustment elements:
l
signal lamp for indication of the switching condition (green/
red)
l
Mode switch for selecting the switching condition (min./
max.)
3.4 Storage and transport
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.
Functional principle
Supply
Packaging
VEGAVIB 55 - - contactless electronic switch 9
Product description
29302
-EN
-070109