12 AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Safety information
Intended application
Intended application
The AO2000 Series gas analyzers are designed for continuous measurement
of the concentration of individual components in gases or vapors.
Any other use is not as specified.
The specified use also includes taking note of this operating instruction.
The AO2000-Fidas24 and Fidas24 NMHC gas analyzers may not be used for
the measurement of ignitable mixtures during normal service. Special
measures must be taken to prevent an explosion hazard during the meas-
urement of flammable gas which can form an explosive mixture in associa-
tion with air or oxygen.
The AO2000 Series gas analyzers as well as the models with type of protec-
tion II 3G for measurement of non-flammable gases and vapors must not be
used for measurement of explosive mixtures. Explosion-protected models of
the gas analyzers are available for this application.
Please note the information on intended application for versions
• with type of protection II 3G for measurement of non-flammable gases
and vapors (see page 18),
• with type of protection II 3G for measurement of flammable and
non-flammable gases (see page 20) and
• for use in Class I Div. 2 explosion hazard areas (see page 33).
Special requirements for the operator
Special requirements for the operator
• The operator must ensure that the gas analyzer is operated only with a
sample gas mixture in which the concentration of flammable sample gas
is below the LEL.
• No explosive gas mixture may be introduced into the gas analyzer –
taking into account pressure, temperature and gas matrix.
• Before commissioning the gas analyzer, the sample gas path must be
purged to remove any potentially explosive gas mixtures from the sam-
ple gas path.
• The operator is obliged to subject the gas analyzer to a leak test at reg-
ular intervals, but at least once a year and after any work on the sample
gas path.
• The operator must ensure that when the gas analyzer is switched off,
the sample gas supply is interrupted and the sample gas path is purged
with compressed air or an inert gas.
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