VEGA VEGAVIB 55 - NAMUR - 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 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 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 with NAMUR electronics can be connected to
different NAMUR amplifiers depending on your requirements.
The specifications for NAMUR amplifiers are available in the
"Technical data".
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
(yellow)
l
Mode switch to select the switching condition (reverse
characteristics)
l
Simulation key
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 - - NAMUR 9
Product description
31214
-EN
-070109