Vega VEGAWAVE 63, Руководство по эксплуатации

Страница: 9 / 40

I t is designed for industrial use in all areas of process
technology and is preferably used for bulk solids .
T ypical applications are over fi ll and dry run protection . T hanks
to its simple and robust measuring system , VEGAWAVE 63 is
virtually una ff ected by the chemical and physical properties of
the bulk solid .
I t functions even when exposed to strong external vibration or
changing products .
S olid detection in water
I f VEGAWAVE 63 was ordered for detection of solids in water ,
the tuning fork is adjusted to the density of water . I n the air or
when covered by water ( density : 1 g / cm ³ / 0 . 036 lbs / in )
VEGAWAVE 63 signals " uncovered " . O nly if the vibrating
element is also covered with solids ( e . g . sand , sludge , gravel
etc .) will the sensor signal " covered " .
F ault monitoring
T he electronics of VEGAWAVE 63 continuously monitors the
following criteria :
l
C orrect vibrating frequency
l
L ine break to the piezo drive
I f one of these faults is detected , the electronics signals this via
a de fi ned current to the signal conditioning instrument . T he
connection cable to the vibrating element is also monitored .
T he tuning fork is piezoelectrically energised and vibrates at its
mechanical resonance frequency of approx . 150 H z . W hen the
tuning fork is submerged in the product , the vibration
amplitude changes . T his change is detected by the integrated
oscillator and converted into a switching command .
VEGAWAVE 63 with NAMUR electronics can be connected to
di ff erent NAMUR ampli fi ers depending on your requirements .
T he speci fi cations for NAMUR ampli fi ers are available in the
" T echnical data " .
T he data for power supply are stated in chapter " T echnical
data " in the " S upplement " .
3 . 3 O peration
W ith the factory setting , products with a density of > 0 . 02 g / cm ³
( 0 . 0008 lbs / in ³ ) can be measured . T he instrument can also be
adapted to products with lower density > 0 . 008 g / cm ³
( 0 . 0003 lbs / in ³ ).
F unctional principle
S upply
VEGAWAVE 63 - - NAMUR 9
P roduct description
32259
-
EN
-
070117