320 AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Status message categories
Status message categories
In terms of operator reaction, there are three categories of status messag-
es:
• Status messages not requiring acknowledgment
• Status messages requiring acknowledgment
• Status messages requiring acknowledgment and troubleshooting
Status messages not requiring acknowledgment
The instrument operates normally after the status has been cleared. When
the status is cleared, the status signal is reset and the status message dis-
appears.
Example: Temperature error during the warm-up phase.
Status messages requiring acknowledgment
The instrument operates normally after the status has been cleared; howev-
er, the operator must be informed of the status. When the status is cleared,
the status signal is reset. The status message disappears as soon as the
operator has acknowledged it. The operator is thus informed about the
malfunction of the instrument.
Example: No new measurement values from the analog/digital converter.
Status messages requiring acknowledgment and intervention
The instrument may not operate normally after the status has been cleared;
the operator must therefore acknowledge the status and eliminate the
cause of the status message. The status signal is reset and the status mes-
sage disappears as soon as the operator has acknowledged it, and the cause
of the status message has been eliminated.
Example: The offset drift between two calibrations exceeds the permissible
range.
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