7
5 Functions and features
The unit continuously detects the level in tanks�
5.1 Applications
• Food and hygienic areas (→ 7.4.3) (→ 7.4.4)�
• Applications with increased requirements for protection rating and resistance
(→ Technical data sheet).
The unit complies with the standard EN 61000-6-4 and is a class A product� The
unit may cause radio interference in domestic areas� If interference occurs, the
user must take appropriate actions�
The microwave energy radiated by the unit is much below that of mobile
phones�
According to the current state of science the operation of the unit can be
classified to be harmless to human health�
5.1.1 Restriction of the application area
Incorrect measurements may be caused by the following media:
- Highly absorbing surfaces (e�g� foam)�
- Intensely bubbling surfaces�
- Media which are very inhomogeneous, separate from each other thus
forming separation layers (e�g� oil layer on water)�
► Check the function by performing an application test�
► Installation in a steady area (→ 7.1)�
> In case of signal loss, the unit displays [SEnS] and switches the
outputs to a defined state (→ 12.8)�
• The unit is not suitable for bulk materials (e�g� plastic granulates) and media
with a dielectric constant, e�g� oils�
• The unit is not suitable for applications where the probe is subjected to
permanent and high mechanical stress (e�g� fast moving viscous media or fast
flowing media)�
• Use preferably in metal tanks� When used in plastic tanks, deterioration caused
by electromagnetic interference may occur (noise immunity to EN61000-6-2)�
Corrective measures: (→ 7.4.2)�
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