Principle Of Operation; Operation - Vega VEGAVIB 63 Operating Instructions Manual

3 Product description
Application area
Functional principle
Voltage supply
8
can find the serial number on the inside of the instrument as well as
on the type label on the outside.
3.2

Principle of operation

VEGAVIB 63 is a point level sensor with vibrating rod for level detec-
tion.
It is designed for industrial use in all areas of process technology and
is preferably used for bulk solids.
Typical applications are overfill and dry run protection. Thanks to its
simple and robust measuring system, VEGAVIB 63 is virtually unaf-
fected by the chemical and physical properties of the bulk solid.
It also works when subjected to strong external vibrations or changing
products.
Solid detection in water
If VEGAVIB 63 was ordered for solid detection in water, the vibrating
rod is calibrated to the density of water. If covered by water (density:
1 g/cm³/0.036 lbs/in) VEGAVIB 63 signals "uncovered". Only if the
vibrating element is also covered with solids (e.g. sand, sludge, gravel
etc.) will the sensor signal "covered".
Function monitoring
The electronics module of VEGAVIB 63 continuously monitors the
following criteria:
•
Correct vibrating frequency
•
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 state).
The vibrating rod is piezoelectrically energised and vibrates at its
mechanical resonance frequency of approx. 360 Hz. When the vibrat-
ing rod is submerged in the product, the vibration amplitude changes.
This change is detected by the integrated electronics module and
converted into a switching command.
VEGAVIB 63 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 pump etc.).
The data for power supply are specified in chapter "Technical data".
3.3

Operation

With the factory setting, products with a density of > 0.05 g/cm³
(0.002 lbs/in³) can be measured. It is possible to adapt the instrument
for products with lower density > 0.02 g/cm³ (0.0007 lbs/in³).
On the electronics module you will find the following display and
adjustment elements:
VEGAVIB 63 • - contactless electronic switch