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3 Product description
VEGABAR 86 • Secondary Device for electronic differential pressure
48048-EN-220817
1
2
Fig. 3: Example, electronic differential pressure for level measurement in pres
-
surized vessel
1 VEGABAR 86
2 VEGABAR 86, Secondary Device
The sensors are connected via a shielded four-wire cable. The meas-
ured value from the Secondary Device is read in and factored into the
calculations. Power supply and parameter adjustment are carried out
through the Primary Device.
You can find further information in chapter "
Combination Primary -
Secondary
" of this operating instructions.
The sensor element is the CERTEC
®
measuring cell with robust
ceramic diaphragm. The process pressure deflects the ceramic
diaphragm and causes a capacitance change in the measuring cell.
This capacitance change is converted into an electrical signal and
outputted as measured value via the output signal.
The measuring cell is available in two sizes:
•
CERTEC
®
(ø 28 mm) with transmitter ø 32 mm
•
Mini-CERTEC
®
(ø 17.5 mm) with transmitter ø 22 mm
A temperature sensor in the ceramic diaphragm of the CERTEC
®
or
on the ceramic base of the Mini-CERTEC
®
measuring cell detects the
actual process temperature. The temperature value is output via:
•
The display and adjustment module
Measuring system
Measuring system tem-
perature