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

3 Product description
Application area
Functional principle
Voltage supply
8
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 point level
detection.
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".
In this application case, the sensor should always be covered by
water for an empty message.
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 voltage sup-
ply, the electronics takes on a defined switching status, i.e. the relay
deenergises (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

Adjustment

On the electronics module you will find the following display and
adjustment elements:
•
Signal lamp for indication of the switching condition (green/red)
VEGAVIB 63 • Relay (DPDT)