l
S
training clamp or threaded
fi
tting
(
optionally
available
)
l
D
ocumentation
-
this operating instructions manual
C
onstituent parts
T
he
VEGAWELL S
51
consists of the following
components
:
l
T
ransmitter
l
S
uspension cable
T
he components are available in di
ff
erent versions
.
3
2
1
F
ig
.
9
:
E
xample of a
VEGAWELL S
51
with screwed connection
1
T
ransmitter
2
S
uspension cable
3
T
hreaded
fi
tting
2
.
2
P
rinciple of operation
A
pplication area
VEGAWELL S
51
is used for level measurement in
vessels and for gauge measurement in deep wells
,
e
.
g
.
in water
/
sewage water applications
.
1
F
unctional principle
T
he actual sensor element is the
CERTEC
®
measuring cell with rugged ceramic diaphragm
.
T
he hydrostatic pressure causes a capacitance
change in the measuring cell via the ceramic
diaphragm
.
T
his change is converted into an
appropriate output signal
.
S
eal concept
A
s a standard feature
,
the
CERTEC
®
measuring
cell is equipped with a lateral
,
recessed seal
.
I
nstruments with double seal have an additional
,
front seal
.
V
oltage supply
T
wo
-
wire electronics
4
…
20
m
A
for power supply
and measured value transmission over the same
cable
.
3
M
ounting
3
.
1
G
eneral instructions
S
uitability for the process conditions
M
ake sure that all parts of the instrument exposed
to the process
,
in particular the sensor element
,
process seal and process
fi
tting
,
are suitable for
the existing process conditions
.
T
hese include
above all the process pressure
,
process temper
-
ature as well as the chemical properties of the
medium
.
Y
ou can
fi
nd the speci
fi
cations in chapter
"
T
ech
-
nical data
"
or on the type label
.
M
ounting position
N
ote the following points when selecting the
installation location
.
l
S
ideways movements of the transmitter can
cause measurement errors
à
T
herefore
,
mount
VEGAWELL S
51
in a calm
area or in a suitable protective tube
P
ressure compensation
T
he connection cable has a capillary for the
atmospheric pressure compensation
.
T
herefore
lead the cable end into a dry environment or a
suitable terminal housing
.
16
VEGAWELL S
51
M
ounting
32946
-
01
-
101123