l
T
echnical data
:
M
easuring range
,
process pressure
,
process
temperature
,
signal output
,
voltage supply
,
protection
,
protection
class
l
O
rder number
l
A
rticle numbers
,
documentation
l
SIL
identi
fi
cation
(
with
SIL
rating ex works
)
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
VEGABAR
55
is a pressure transmitter for use in the chemical
,
food
processing and pharmaceutical industries
.
D
epending on the version
,
it is used for level
,
gauge
,
absolute pressure or vacuum measurement
.
M
easured products are gases
,
vapours and liquids
,
also those with
higher temperatures
.
T
he
METEC
®
measuring cell is the measuring unit
.
I
t consists of the
ceramic
-
capacitive
CERTEC
®
measuring cell and a special
,
temper
-
ature
-
compensating isolating system
.
T
he hydrostatic pressure of the product or the process pressure
causes a capacitance change in the measuring cell via the metal
process diaphragm and the isolating liquid
.
T
his change is converted
into a corresponding output signal
.
T
wo
-
wire electronics
4
…
20
m
A
for power supply and measured
value transmission over the same cable
.
T
he supply voltage range can di
ff
er depending on the instrument
version
.
T
he exact range is stated in chapter
"
T
echnical data
"
.
T
he background lighting of the indicating and adjustment module is
powered by the sensor
.
A
certain level of operating voltage is required
for this
.
Y
ou can
fi
nd the exact voltage speci
fi
cations in chapter
"
T
echnical data
"
.
T
he optional heating requires its own operating voltage
.
Y
ou can
fi
nd
details in the supplementary instructions manual
"
H
eating for indicat
-
ing and adjustment module
"
.
T
his function is generally not available for approved instruments
.
3
.
3
O
peration
VEGABAR
55
can be adjusted with di
ff
erent adjustment media
:
l
with indicating and adjustment module
l
with the suitable
VEGA DTM
in conjunction with an adjustment
software according to the
FDT
/
DTM
standard
,
e
.
g
.
PACT
ware and
PC
A
pplication area
F
unctional principle
P
ower supply
8
VEGABAR
55
•
4
…
20
m
A
3
P
roduct description
36733
-
EN
-
091008
