For Use In Hazardous Areas - Siemens ULTRAMAT 23 Series Equipment Manual

6.1.2

For use in hazardous areas

Explosion hazard
If a flammable or ignitable atmosphere exists, plugs must never be disconnected or lamps/
fuses replaced when the analyzer is supplied with power.
CSA Class I Div. 2 and ATEX Zone 2
The following safety and warning information applies to analyzers (special versions) which are
operated in accordance with CSA Class I Div. 2 (hazardous locations) and ATEX Zone 2:
Potentially explosive atmosphere
Do not open, service or repair in an area in which a potentially explosive atmosphere may be
present.
ATEX Zone 2
The following applies to devices (special versions) which are operated according to ATEX in Ex
zone 2:
Explosion hazard
The ULTRAMAT 23 gas analyzers for use in Ex zone 2 must be installed in a lockable enclosure
with IP54 degree of protection. This enclosure must comply with the requirements of
EN 60079-15 and must be designed for all ambient conditions which can occur during
operation.
The maximum ambient temperature is 50 °C.
Suitable measures must additionally be applied to ensure that
• the generation of potentially explosive gas mixtures inside the analyzer does not exceed the
• interferences cannot lead to a deviation of more than 40% from the rated voltage.
Operation of analyzers in hazardous areas
For safe operation of the analyzer in hazardous areas, it is essential to observe the information
and conditions referred to in the "ATEX compact operating instructions for ULTRAMAT 23".
ULTRAMAT 23
Equipment Manual, 04/2022, A5E37100388-012
DANGER
WARNING
DANGER
level of Zone 2
WARNING
Commissioning
6.1 Safety instructions
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