KROHNE OPTISWITCH 3x00 EX II1_2D-II2D-IP66T DE - Manual (Page 21)

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3.3 Protection class acc. to EN60529:
Protection class, sensor (category 1D):
IP68
Protection class, electronics housing (category 2D): IP66
3.4 Permissible operating pressure on the sensor
the process pressure in hazardous atmospheres must be between 0.8 bar and 1.1. bar.
The permissible combinations of pressure and temperatures without hazardous mixtures are
mentioned in the manufacturer declaration e.g. in the operating manual.
4. Grounding
The vibrating level switches OPTISWITCH 3*00 C VF3* must be grounded.
5. Cable entries
The cable entries enclosed are suitable for the housing temperature ranges mentioned in the EC type
approval certificate OPTISWITCH 3*00 C VF3*.
Cable entries may only be replaced by the same type or separate cable entries certified acc. to ATEX
and IP66 at least. If another cable entry is used, the separately certified cable entry determines the
max. permissible ambient temperature on the housing (max. values: - 40 °C, + 77°C).
6. Installation, mounting
OPTISWITCH 3300 C VF33 have to be mounted such that they are effectively secured against the
danger by bending the sensor and extension tube under consideration of the vessel installations and
the solid within the vessel.
7. Tensile force at the suspension cable, version OPTISWITCH 3200 C VF32
The permissible tensile force of OPTISWITCH 3200 C VF32 is 3000N.
OPTISWITCH-STEX 30106-DE-050912 21