332 AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Gas analyzer: Troubleshooting
Blinking measurement value readout
Measured signal overshoots measurement range limits
Note: Measured value > +130 % of MRS or measured value < −100 % of MRS.
Additionally, status messages 344 or 345 are generated.
Blinking --E-- alternately in measurement value readout
Problem in measured signal processing
• View status messages.
• Identify cause and repair.
Blinking --E-- in mA value readout
Problem in output current circuit
• Identify cause (e.g. line break) and repair.
Flow error
External gas lines or filter contaminated, clogged up or leaky
• Disconnect gas analyzer from the gas conditioning system.
• Blow compressed air through gas lines or mechanically clear them.
• Exchange filter elements and filter beds.
• Check gas lines for seal integrity.
Gas feed paths in the gas analyzer kinked or leaky
• Disconnect gas analyzer from the gas conditioning system.
• Check whether the gas lines in the analyzer module or to the pneumatic
module are kinked or have become detached from the connections.
• Check the seal integrity (see page 268) of the analyzer module gas paths
and (if applicable) of the lines to the pneumatics module.
Sample gas flow rate conditions
Analyzer module Sample gas flow rate
Caldos25 10 to 90 l/h (for option T90 < 6 s: max. 90 to 200 l/h)
Caldos27 10 to 90 l/h min. 1 l/h
Fidas24 80 to 100 l/h with atmospheric pressure (1000 hPa)
Fidas24 NMHC 80 to 100 l/h with atmospheric pressure (1000 hPa)
Limas11 IR 20 to 100 l/h
Limas21 UV 20 to 100 l/h
Limas21 HW 20 to 90 l/h
Magnos206 30 to 90 l/h
Magnos28 30 to 90 l/h
Magnos27 20 to 90 l/h
Uras26 20 to 100 l/h
ZO23 5 to 10 l/h The flow rate must be kept constant to
±0.2 l/h in this range. The sample gas
must be taken from a bypass at zero
pressure.
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