Analyzers In Biogas Plants; Gas Connections And Internal Gas Path; Gas Connections - Siemens ULTRAMAT 23 Series Equipment Manual

Connecting

5.2 Gas connections and internal gas path

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".
5.1.3

Analyzers in biogas plants

Explosion hazard
This device is used in biogas plants, among other places. When it is used in biogas plants, you
should expect that the sample gas will contain methane, which forms explosive mixtures with
oxygen or air in certain concentrations. These conditions are possible with certain operating
states of the plant.
5.2 Gas connections and internal gas path
5.2.1

Gas connections

Note
The overpressure at the sample gas inlet must not exceed 45 hPa.
Sample gas line
A pipe with an outer diameter of 6 mm or 1/4" is present as the gas connection. The materials
used in the gas path must be suitable for the respective measurement.
If you wish to exit the sample gas into a collective exhaust line, observe the following points:
• The exhaust line must be free of rapid changes in pressure. If this is not possible, either a
separate exhaust line must be installed, or a damping vessel with a capacity >1 l must be
installed between the analyzer and the exhaust line.
• The exhaust gas line must always be routed with a falling gradient away from the device since
moisture can condense in it.
70
WARNING
DANGER
Equipment Manual, 04/2022, A5E37100388-012
ULTRAMAT 23