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4 Function
4.1 Measuring principle
The unit operates to the impedance spectroscopy
method� It analyses the electrical characteristics of the
media to be monitored in the frequency range between
50 and 200 MHz� An electrical field is generated by the
probe tip which is influenced by the level�
The nature of the medium and deposits or foam have
different electrical characteristics that are used for the
evaluation�
Fig. 4-1
4.2 Processing of the measured signals
Factory setting
Outputs OUT1 and OUT2 complement each other:
OUT1 = Hno; OUT2 = Hnc
No medium detected
OUT1 = OFF OUT2 = ON
Medium detected
OUT1 = ON
OUT2 = OFF
The readiness for operation and the switching status are indicated by LEDs�
