Principle Of Operation - Vega VEGABAR 66 Operating Instructions Manual

Application area
Functional principle
Seal concept
VEGABAR 66 • 4 ... 20 mA/HART - climate compensated
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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.
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Principle of operation

VEGABAR 66 4 ... 20 mA/HART - climate compensated is a suspen-
sion pressure transmitter for level measurement in wells, basins and
atmospherically open vessels under difficult conditions (cold medium
and warm humid environment).
The sensor element is an encapsulated CERTEC
measuring cell with robust, front-flush (depending on the process
fitting), abrasion resistant ceramic diaphragm. The process pressure
causes a capacitance change in the measuring cell via the ceramic
diaphragm. This capacitance change is converted into an electrical
signal, compared with an integrated reference pressure measurement
and outputted as measured value via the 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.
As a standard feature, the CERTEC
a lateral, recessed seal.
Instruments with double seal have an additional front seal.
3 Product description
absolute pressure
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measuring cell is equipped with
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