SensoGate WA131M
9
1.7 Operation in Explosive Atmospheres
The SensoGate WA131M-X is certified for operation in explosive atmospheres.
•
EU-Type Examination Certificate KEMA 04ATEX4035X
Exceeding the standard atmospheric conditions within the manufacturer’s specifications, such as am-
bient temperature, process pressure and temperature, does not impair the durability of the retractable
fittings.
Related certificates are included in the product’s scope of delivery and are available at www.knick.de
in the current version.
Observe all applicable local and national codes and standards for the installation of equipment in ex-
plosive atmospheres. For further guidance, consult the following:
•
IEC 60079-14
• EU directiv
es 2014/34/EU and 1999/92/EC (
ATEX)
1.7.1 Possible Ignition Hazards During Installation and Maintenance
To avoid mechanically generated sparks, handle the SensoGate WA131M-X with care and apply suit-
able measures, e.g., use covers and pads.
The metallic parts of the SensoGate WA131M-X must be connected to the plant’s equipotential bond-
ing using the metallic process connection and the grounding connection provided for that purpose.
When components are replaced with genuine Knick spare parts made of other materials (e.g. O-rings),
the information given on the nameplate may deviate from the actual version of the SensoGate
WA131M-X. The operating company must assess and document this deviation.
Electrostatic charging
The drive unit of specific versions of the SensoGate WA131M-X contains housing components made
of non-conductive plastic. Due to their surface, the housing components may build up an electro-
static charge. To prevent this charge from becoming an effective ignition source in Z
that the following conditions are met:
• Highly efficient charge generating mechanisms are excluded
• Non-metallic components are cleaned with a moist cloth only
Mechanically generated sparks
Single impacts on metal parts or collisions between metal parts of the SensoGate WA131M-X are not
a potential ignition source only if the following conditions are met:
• Possible impact velocity is less than 1 m/s
• Possible impact energy is less than 500 J
If these conditions cannot be ensured, the operating company must reassess single impacts on metal
parts or collisions between metal parts as potential sources of ignition. The operating company must
implement suitable risk minimization measures, e.g., by ensuring a non-explosive atmosphere.
1.7.2 Possible Ignition Hazards During Operation
When using non-water-based cleaning, rinsing, or calibration media with low conductivities of less
than 1 nS/m with a calibr
ation chamber made of polypropylene (PP), electrostatic charging of internal,
conductive components may occur. The operating company must assess the associated risks and im-
plement appropriate measures.
The sensors that are used must be approved for operation in hazardous locations. Further information
can be found in the sensor documentation.
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