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AO2000
CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
335
Fidas24: Troubleshooting
Flow error
Sample gas inlet nozzle or sample gas filter clogged
•
Check whether sample gas inlet nozzle and sample gas filter in the sam-
ple gas terminal are clogged.
•
Replace sample gas filter (see page 279).
Temperature problem
Connecting leads of the temperature sensor or the heater discon-
nected.
•
Check the connecting leads and connectors.
•
Check the fit of the leads in the wire end ferrules.
•
Inspect power supply of the heater.
Unstable readings
Vibrations
•
Reduce vibration at the installation site.
Sample gas path leaky
•
Check gas path in the analyzer module and in the sampling modules for
seal integrity.
Loss of sensitivity
•
Have sample gas nozzle replaced by Service.
Sample gas outlet pressure too high
•
Check air jet injector for congestion, if necessary clean (see page 281).
Increase instrument air pressure. Check air discharge line; it must have a
large internal diameter.
Combustion air contaminated
•
Check combustion gas supply
Fluctuating process gas pressures
•
Check the supply of instrument air, combustion air and combustion gas