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3 Product description
VEGAPOINT 21 • Transistor (NPN/PNP)
56623-EN-210210
It is designed for industrial use in all areas of process technology and
can be used in water-based liquids.
Typical applications are overfill and dry run protection. With a the
small sensor unit, VEGAPOINT 21 can be also mounted e.g. in thin
pipelines. The sensor allows use in vessels, tanks and pipes. Thanks
to its simple and robust measuring system, VEGAPOINT 21 is virtu-
ally unaffected by the chemical and physical properties of the liquid.
It also works under difficult measuring conditions such as turbulence,
air bubbles, strong external vibrations or changing media. In addition,
the sensor can also detect foam.
Function monitoring
The electronics module of VEGAPOINT 21 continuously monitors the
following criteria via frequency generation:
•
Failure of the signal generation
•
Line break to the sensor element
If a malfunction is detected or in case of voltage supply, the electron-
ics takes on a defined switching status, i.e. the output is open (safe
state).
An alternating electric field is generated at the tip of the measur-
ing electrode. If the sensor is covered with medium, the resonance
frequency changes. This change is detected by the electronics and
converted into a switching command.
Buildup is ignored to a certain degree and therefore has no influence
on the measurement.
3.3 Adjustment
The switching status of VEGAPOINT 21 can be checked from outside
(LED illuminated ring).
The optionally integrated Bluetooth module enables in addition a wire-
less adjustment of VEGAPOINT 21.
This is done via standard operating devices:
•
Smartphone/tablet (iOS or Android operating system)
•
PC/notebook with Bluetooth LE or Bluetooth USB adapter (Win-
dows operating system)
Functional principle
Local adjustment
Wireless adjustment
