Connecting
5.4 Instructions specific to hazardous area installations
SITRANS LR250 with FOUNDATION FIELDBUS
Compact Operating Instructions, 09/2021, A5E48453221-AB
39
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 FF is being installed
in locations that specifically require Equipment Protection level Ga or Da.
• The equipment shall be infallibly bonded according to the relevant code of practice.
• The end use must ensure that the explosion protection and ingress protection of IP64 is
maintained at each entry to the enclosure by use of a blanking element or cable entry
device that meets the requirements of the protection concepts type 'n' or increased
safety 'e' or flameproof 'd'.
• Any glands, conduit entry devices or blanking elements fitted to the equipment shall
suitably Certified and installed in compliance with IEC 60079-14 for the explosive
environment, method of protection, and environmental conditions applicable for end use.
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