Page 2/7
FAFNIR GmbH
⚫
Schnackenburgallee 149 c
⚫
22525 Hamburg
⚫
Tel.: +49 / (0)40 / 39 82 07-0
⚫
www.fafnir.de
⚫
III.b
…
assembling and dismantling
The assembly and disassembly must solely be carried out with the power disconnected!
Prior to the installation, it may be necessary that the float/s or the density module is disassembled. During the as-
sembly it must be ensured that the float/s or the module is/are mounted the right way on the sensor tube.
Only with the TORRIX Ex ... with screw terminals the opening of the sensor head is planned. Further disassembly may
damage the filling level sensor and void its approval.
With the TORRIX Exd
…
a certified cable gland must be installed in the flameproof enclosure according to the manu-
facturer's instructions. The covers of the connection compartment and of the display can be opened after switching
off both circuits (sensor and heating) with a four-minute waiting time, whereby the M4 hexagon socket locking screw
must first be loosened (screw into the enclosure). To close the cover, screw it back on completely and then secure it
with the M4 screw (screw it out of the enclosure against the cover).
III.c
…
installation
All wiring operations must solely be carried out with the power disconnected. Special rules and regulations, including
EN 60079-14 and local installation regulations, must be observed.
If a device is supplied with screw-in unit, the thread of the screw-in unit must be fitted with a suitable sealing material,
screwed into the existing sleeve and tightened. In case of a riser installation the plastic centring aid is plugged onto
the sensor head. Then allow the sensor to slide into the riser tube until it stands firmly on the bottom. If the filling
level sensor is supplied without process fitting, the installer is responsible for compliance with the Ex requirements.
General information (see also EN 60079-26, Clause 4.3):
If a device is installed into the boundary wall between zone 0 and zone 1, it is essential to ensure that a minimum
protection of IP66 or IP67 is achieved after installation.
Through the process connection, there may be an opening in the boundary wall to the area requiring EPL Ga. There
is then the risk of the release of flammable gas and the flame entrance.
A heat return flow from the process, e. g. by heat radiation, beyond the permissible ambient temperature is not per-
missible. This can be avoided, for example, by suitable thermal insulation or by mounting the sensor head of the
sensor at a greater distance (cooling distance).
In case of hazards due to oscillation or swinging, the corresponding parts of the sensor must be effectively secured
against these hazards.
Flexible filling level sensor (TORRIX
Ex…
Flex
…, VISY
-Stick
…
Flex
…)
This type can be produced with different sensor bases to serve for stabilizing the sensor. A base can be a magnetic
base. The magnet is then encapsulated in an electricity conducting plastic and can therefore be used in potentially
explosive areas.
If this version is manufactured without a fixture, it may only be used in non-flowing liquids or it must be ensured
that it does not turn, e. g. by a protective tube or by a weight as a
sensor foot.
LPG filling level sensor VISY-Stick
…
LPG
…
The adjustable installation kit for LPG tanks was developed to allow the sensor to be installed and removed at any
time without any additional work and without having to open the tank. The adjustable installation kit for LPG tanks
consists of a jacket pipe with special LPG float made of BUNA and a ¾" NPT cutting ring fitting. 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.
Environmental sensor VISY-Stick Sump
…
This environmental sensor can be fixed with the mounting kit.
When wiring the intrinsically safe sensor to the associated apparatus (preferably blue coloured cable), the approved
inductance and capacitance of the associated apparatus must not be exceeded. The terminals of the sensor must be
connected to the same terminals of the isolating amplifier.
Содержание TORRIX XTS Series
Страница 51: ...Blank Page...
