Connecting
5.4 Instructions specific to hazardous area installations
SITRANS LR250 with mA/HART
48 Operating Instructions, 10/2019, A5E32220602-AG
Special conditions for safe use (denoted by X after the certificate number)
● Parts of the enclosure may be non-conducting and may generate an ignition-capable
level of electrostatic charge under certain extreme conditions. The user should ensure
that the equipment is not installed in a location where it may be subjected to external
conditions (such as high-pressure steam), which might cause a build-up of electrostatic
charge on non-conducting surfaces.
● Aluminium, magnesium, titanium or zirconium may be used at the accessible surface of
the equipment. In the event of rare incidents, ignition sources due to impact and friction
sparks could occur. This shall be considered when the SITRANS LR250 mA/HART is
being installed in locations that specifically require group II, level of protection Ga or Da.
● The equipment shall be bonded to the system earth in accordance with the relevant code
of practice.
● When the SITRANS LR250 mA/HART is used in the presence of combustible dust, the
gland that is fitted to the equipment shall also be suitable for use in the presence of
combustible dust, as certified by an ATEX notified body, in addition, the installation of the
gland shall not compromise the IP6X rating of the equipment enclosure.
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