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
-
EN
-
090415
