Vega EL 4, Руководство по эксплуатации

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T he type label contains the most important data for identi fi cation and
use of the instrument :
l
A rticle number
l
S erial number
l
T echnical data
l
A rticle numbers , documentation
T he serial number allows you to access the delivery data of the
instrument via www . vega . com , " VEGA T ools " and " serial number
search " . I n addition to the type label outside , you can also fi nd the
serial number on the inside of the instrument .
3
.
2
P rinciple of operation
EL 4 is a point level sensor with partly insulated conductive electrode
for level detection .
EL 4 is very rugged and can be used in all areas of industrial process
technology .
T he level switch can be used in conductive liquids such as e . g . water .
T ypical applications are over fi ll and dry run protection .
T
he conductive measuring principle places no special requirements on
installation . H ence , many di ff erent applications can be equipped with
EL 4 .
C onductive probes detect the product resistance when their electro -
des are covered by the product .
T he switching signal is determined by the length or mounting position
of the respective electrode .
A low alternating current fl ows through the electodes , is measured for
amplitude and phase position by the electronics of the signal
conditioning instrument and converted into a switching command
.
EL 4 is operated with an external processing unit . T he connected
signal conditioning instrument powers EL 4 and provides a switching
signal . A connected device can be activated directly with this switching
command ( e . g . a warning system , a PLC , a pump , etc .).
Y
ou can fi nd the exact range of the voltage supply in chapter
"
T
echnical data " in the operating instructions manual of the signal
conditioning instrument .
3 . 3 O peration
T he probe does not have its own electronics . T he measurement is
carried out via the connected signal conditioning instrument .
T ype label
A pplication area
F unctional principle
P ower supply
C onductive probe EL 4 7
3 P roduct description
32653
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EN
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090415