VEGA VEGABAR 67 Foundation Fieldbus - Manual (Page 9)

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3 Product description
VEGABAR 67 • Foundation Fieldbus
36744-EN-130321
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1
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5
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Fig. 2: Layout of the type label (example)
1 Instrument type
2 Product code
3 Approvals
4 Electronics
5 Protection rating
6 Measuring range
7 Process and ambient temperature, process pressure
8 Material, wetted parts
9 Hardware and software version
10 Order number
11 Serial number of the instrument
12 ID numbers, instrument documentation
With the serial number, you can access the delivery data of the instru-
ment via www.vega.com, "VEGA Tools" and "serial number search".
In addition to the type label outside, you can also find the serial num-
ber on the inside of the instrument.
3.2 Principle of operation
VEGABAR 67 is a suspension pressure transmitter for level measure-
ment in vessels. Measured products can be all media against which
the wetted materials of VEGABAR 67 are resistant. 1)
The METEC ® measuring cell is the measuring unit. It consists of
the ceramic-capacitive CERTEC ® measuring cell and a special,
temperature-compensated isolating system.
The hydrostatic pressure of the product or the process pressure
causes a capacitance change in the measuring cell via the metallic
process diaphragm and the isolating liquid. This change is converted
into a corresponding output signal.
The CERTEC
® measuring cell is also equipped with a temperature
sensor. The temperature value can be displayed via the display and
adjustment module or processed via the signal output.
Power is supplied via the H1 Fieldbus. A two-wire cable according to
Fieldbus specification serves as carrier of both power and digital data
for multiple sensors. This cable can be operated in two versions:
Application area
Functional principle
Power supply and bus
communication
1) For use in atmospherically closed vessels under vacuum, VEGABAR is avail-
able with absolute pressure measuring ranges.