VEGA VEGAVIB 62 - NAMUR - Manual (Page 8)

l SIL identification (with SIL rating ex works)
With the serial number, you can access the delivery data of the
instrument via www.vega.com, "VEGA Tools" and "serial number
search". In addition to the type label outside, you can also find the
serial number on the inside of the instrument.
3 .2 Principle of operation
VEGAVIB 62 is a point level sensor with vibrating rod for 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 62 is virtually
unaffected 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 62 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 62 signals "uncovered". Only if the
vibrating element is also covered with solids (e.g. sand, sludge, gravel
etc.) will the sensor signal "covered".
Fault monitoring
The electronics module of VEGAVIB 62 monitors continuously the
following criteria:
l Correct vibrating frequency
l Line break to the piezo drive
If one of these faults is detected, the electronics signals this via a
defined current to the signal conditioning instrument. The connection
cable to the vibrating element is also monitored.
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 electronics module
and converted into a switching command.
VEGAVIB 62 with NAMUR electronics can be connected to different
NAMUR amplifiers depending on your requirements. The specifica-
tions for NAMUR amplifiers are available in the "Technical data".
The data for power supply are specified in chapter "Technical data".
Application area
Functional principle
Voltage supply
8 VEGAVIB 62 • - NAMUR
3 Product description
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