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Safety instructions
2.4 Analyzers in hazardous areas
Explosion hazard
When the device is used in biogas plants, you should expect that the sample gas will contain
methane (CH
These conditions might occur under certain operating states of the plant. These operating
states are to be avoided in the plant.
2.4
Analyzers in hazardous areas
Unsuitable device for the hazardous area
Danger of explosion.
• Only use equipment that is approved for use in the intended hazardous area and labelled
Safety instructions for explosion protection (ATEX, IECEx, FM, CSA)
The gas analyzer designed as a 19" rack unit must be installed in a separate enclosure having
IP54 degree of protection that meets the requirements in accordance with EN/IEC/CSA/UL
60079-0 and EN/IEC/CSA/UL 60079-7, if it is used in Zone 2 or Class I Division 2.
The device may only be used in an area with pollution degree 2 or better according to IEC
60664-1. Overvoltage protection must be available which is set to a value that does not
exceed 140% of the maximum nominal voltage value at the power supply terminals of the
device.
Connecting and disconnecting the plug-in connectors from live circuits is only permissible for
installation, maintenance or repair purposes if a potentially explosive gaseous atmosphere
can be ruled out.
You must only connect devices which do not generate sparks during normal operation
to non-intrinsically-safe circuits in Zone 2, and these must be suitable for operation in
hazardous areas of Zone 2 under the conditions prevailing at the place of operation.
The measuring function for the explosion protection is not part of the ex test report.
2.4.1
ULTRAMAT 23 IEC, ATEX, CSA, with option E20
The introduction of flammable gases is not permitted for an ULTRAMAT 23 with order option E20.
18
DANGER
), which forms explosive mixtures with oxygen or air in certain concentrations.
4
WARNING
accordingly.
Compact Operating Instructions, 01/2024, A5E45779144002-AB
Series 6 and ULTRAMAT 23
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