8
4.3.1 Restriction of the application area
•
The unit is not suitable for bulk materials (e�g� plastic granulates)�
•
If the unit is to be used in acids or alkalis, in hygienic areas or in electroplating
applications: first check the compatibility of the product materials (→ 13
Technical data) with the media to be monitored�
•
Incorrect measurements or signal loss 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 an application test�
> In case of signal loss, the unit displays [E�033] and switches the outputs to a
defined state (→ 11.5).
•
The unit is not suitable for applications where the probe is subjected to
permanent and high mechanical stress (e�g� strongly moving viscous media or
strongly flowing media)�
•
In case of operation with single probe: use preferably in metal tanks� When
installed in plastic tanks, deterioration caused by electromagnetic interference
may occur (noise immunity to EN61000-6-2)�
Remedy: → 6.4.4.
•
In case of operation with coaxial probe: not suitable for viscous media and
media prone to formation of deposit� Maximum viscosity: 500 mPa · s�
