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Connecting
4.5 Analyzers for operation in hazardous areas
Figure 4-8
4.5.4
Connection of sample gas and protective gas (purging gas)
Analyzers used in hazardous areas must be purged with air or inert gas. The gas discharged by
purging must be routed via an exhaust gas line for environmentally-friendly disposal.
When measuring toxic or corrosive gases, it could occur that sample gas accumulates in the
analyzer because of leaks in the gas path. No gases containing potentially hazardous
concentrations of toxic, corrosive or combustible components may therefore be connected to
restricted breathing devices (Ex nR).
Analyzers provided with heating must always be purged when using with corrosive gases.
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Terminal connection diagram for AUTOCAL board of field devices
Compact Operating Instructions in accordance with EN 61010-1 and EN 60079-0
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Compact Operating Instructions, 09/2018, A5E45779389002-01
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