Principle Of Operation; Adjustment - Vega VEGAWAVE 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

VEGAWAVE 63 is a point level sensor with tuning fork 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, VEGAWAVE 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 VEGAWAVE 63 was ordered for solids detection in water, the tuning
fork is set to the density of water. In air or when immersed in water
(density: 1 g/cm³/0.036 lbs/in), VEGAWAVE 63 signals "uncovered".
Only when 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 VEGAWAVE 63 continuously monitors the
following criteria:
•
Correct vibrating frequency
•
Line break to the piezo drive
If a malfunction is detected or in case of voltage supply, the electron-
ics takes on a defined switching status, i.e. the output is open (safe
state).
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 electronics module and
converted into a switching command.
VEGAWAVE 63 is a compact instrument, i.e. it can be operated with-
out 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)
•
Potentiometer for adaptation to the product density
•
Mode switch for selecting the switching condition (min./max.)
VEGAWAVE 63 • Transistor (NPN/PNP)