Principle Of Operation - Vega VEGABAR 66 Operating Instructions Manual

Application area
Functional principle
Seal concept
VEGABAR 66 • Foundation Fieldbus
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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

The VEGABAR 66 is a suspension pressure transmitter for level
measurement in wells, basins and atmospherically open vessels.
For use in atmospherically closed vessels under vacuum, the instru-
ment is available with absolute pressure measuring ranges.
Sensor element is the CERTEC
ent on the process fitting also front-flush, abrasion-resistant ceramic
diaphragm. The process pressure causes a capacitance change in
the measuring cell via the ceramic diaphragm. This change is con-
verted into an appropriate output signal and outputted as measured
value.
The CERTEC measuring cell is also equipped with a temperature
®
sensor. The temperature value can be displayed via the display and
adjustment module as well as processed via the signal output (with
digital versions).
As a standard feature, the CERTEC
a lateral, recessed seal.
Instruments with double seal have an additional front seal.
3 Product description
measuring cell with robust, depend-
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measuring cell is equipped with
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