Vega WELL S 51 Mise En Service page 17

The components are available in different
versions.
Abb. 10: Example of a VEGAWELL S 51 with screwed
connection
1 Transmitter
2 Suspension cable
3 Threaded fitting
2.2 Principle of operation
Application area
VEGAWELL S 51 is used for level measurement
in vessels and for gauge measurement in deep
wells, e.g. in water/sewage water applications.
Functional principle
The actual sensor element is the CERTEC
measuring cell with rugged ceramic diaphragm.
The hydrostatic pressure causes a capacitance
change in the measuring cell via the ceramic
diaphragm. This change is converted into an
appropriate output signal.
Seal concept
As a standard feature, the CERTEC
cell is equipped with a lateral, recessed seal.
Instruments with double seal have an additional
front seal.
For use in closed vessels under vacuum, VEGAWELL 51 is available with absolute pressure measuring ranges.
6)
VEGAWELL S 51 •
2
1
6)
®
measuring
®
4
5
Abb. 11: Front-flush installation of the CERTEC
measuring cell with double seal
1 Housing, sensor
2 Measuring cell
3 Lateral seal for measuring cell
4 Additional, front seal for measuring cell
5 Diaphragm
Voltage supply
Two-wire electronics 4 ... 20 mA for power
supply and measured value transmission on the
same cable.
3 Mounting
3.1 General instructions
Process conditions
Note:
For safety reasons, the instrument must
only be operated within the permissible
process conditions. You can find detailed
information on the process conditions in
chapter "Technical data" of the operating
instructions or on the type label.
Hence make sure before mounting that all parts
of the instrument exposed to the process are
suitable for the existing process conditions.
These are mainly:
•
Active measuring component
•
Process fitting
•
Process seal
Process conditions in particular are:
•
Process pressure
•
Process temperature
•
Chemical properties of the medium
•
Abrasion and mechanical influences
Suitability for the ambient conditions
The instrument is suitable for standard and
extended ambient conditions acc. to DIN/EN/
3 Mounting
1
2
3
®
17