Siemens SITRANS L Series Compact Operating Instructions page 34

Connecting
5.4 Instructions specific to hazardous area installations
3. The equipment may be used with flammable gases and vapors with apparatus group IIC, IIB
and IIA and temperature classes T1, T2, T3 and T4.
4. The equipment has a degree of ingress protection of IP67 and a temperature class of T100
°C and may be used with flammable dusts.
5. The equipment is certified for use in an ambient temperature range of –40 °C to +80 °C.
6. The equipment has not been assessed as a safety related device (as referred to by Directive
2014/34/EU, clause 1.5).
7. Installation and inspection of this equipment shall be carried out by suitably trained
personnel in accordance with the applicable code of practice (EN 60079-14 and EN
60079-17 in Europe).
8. The equipment is non-repairable.
9. The certificate numbers have an 'X' suffix, which indicates that special conditions for safe
use apply. Those installing or inspecting this equipment must have access to the certificates.
10.If the equipment is likely to come into contact with aggressive substances, then it is the
responsibility of the user to take suitable precautions that prevent it from being adversely
affected, thus ensuring that the type of protection is not compromised.
– Aggressive substances: for example, acidic liquids or gases that may attack metals, or
– Suitable precautions: for example, establishing from the material's data sheet that it is
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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solvents that may affect polymeric materials.
resistant to specific chemicals.
SITRANS LR250 with mA/HART
Compact Operating Instructions, 11/2019, A5E48453192-AA