fafnir CONDURIX DU, Техническая документация инструкция

Страница: 21 / 24

Annex Page 18/ 20
10.3 Safety instructions
Level Gauge CONDURIX Ex …
Edition: 04.2011
I Range of application
The intrinsically safe equipment CONDURIX Ex … is used for the continuous measurement of liquid
levels. The level sensor operates only in electrically conductive liquids (conductivity
≥
1 μS/cm). If the
level sensor is inserted into a tank with non - conducting wall, the sensor must be equipped with a
counter electrode, e. g. the CONDURIX Ex MA …
II Standards
See EC- Type Examination Certificate.
III Instructions for safe …
III.a … use
The approval applies to the following types or device versions:
CONDURIX Ex … Mono
CONDURIX Ex … DU
CONDURIX Ex … MA
CONDURIX Ex E HY
CONDURIX Ex E … V
CONDURIX Ex … extern
CONDURIX Ex … extern Steck
CONDURIX Ex … M12
All level sensors CONDURIX Ex … can be produced with plastic insulation (e. g., PEEK, PTFE or cera m-
ic with O ring seal).
In order to vary the height the version CONDURIX Ex E … V is provided. The process connection is
done via a cutting ring fitting.
With limited mounting space the electronics may be installed in an external enclosure (CONDURIX Ex
… external). The connection to the sensor can be done via a fixed cable or via a connector (e. g.,
LEMO).
The level sensor CONDURIX Ex … HART has in addition to the current signal a digital communication
capability supported by the HART protocol. This allows a highly flexible programming and operation
of the level sensor.
III.b … mounting
Screw - in unit:
Seal the thread of the screw - in unit with a suitable sealing material, screw it into the existing
socket and tighten it.
In the case of installation with a cutting ring fitting, the position of the sensor can no longer be
altered after the union nut has been tightened.
Flange:
The probe tube is permanently fixed to the flange, which means that the installation length
cannot be altered. Seal the flange with a suitable sealing and fix it with the flange bolts or nuts.
If the filling level sensor is supplied without process connection, the installer is responsible for co m-
pliance with the EX requirements.