ABB EL3000 Series, Руководство пользователя

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40 EL3000 CONTINUOUS GAS ANALYZERS | CI/EL3000-EN REV. B
Housing purge during operation when measuring flammable gases
The housing has to be purged with nitrogen. Purge gas flow 1 to 20 l/h. The
purge gas flow must be monitored at the purging gas outlet.
Housing purge in the Fidas24
The housing purge is implemented in the Fidas24 gas analyzer in such a way
that a part (approx. 600 to 700 l/h) of the instrument air is conducted con-
tinuously through the housing as purging air. This ensures that a flammable
mixture cannot form in the housing in the event of a leak in the combustible
gas feed path.
The housing purge is always active if compressed air is switched on, even if
the instrument air valve is closed.