ABB ACF5000 Manual page 77

Procedure
Parameter
Enable
Cycle time
Next reference
date/time
Purge time
Meas->zero gas,
Zero->meas. gas
Gas path
Cancel management
Duration
ACF5000 FTIR ANALYZER SYSTEM
Explanation
Automatic reference recording is completed only when it is activated.
The cycle time shows the time intervals over which automatic recording of
references is completed.
Recommended setting: 12 hours.
The analyzer system completes the next automatic reference recording pro-
cess at the time specified here. From this moment in time, the cycle period
starts to run.
Two parameters must be set: The time after connecting the zero air until
reference recording begins and the time after re-connecting the measure-
ment gas until the gas paths are purged at the beginning of measuring, so
that no residual gas can influence the results of the reference recording or
the measurement.
Recommended setting: Purging should last at least triple the T90 time of the
entire analyzer system (typically 240 seconds).
The setting must also be configured as to whether the zero air, which is
piped through the analyzer system while the reference is being recorded, is
emitted locally at the analyzer system or via sampling.
This setting also applies for the test gas release during the automatic ad-
justment of the FID (see page 86) and the O
The automatic reference recording is always canceled in the event of a sys-
tem bus error and when setting the block input. You can configure if the
automatic reference recording is to be terminated when one of the three
states occurs during the procedure: "System failure", "Analyzer failure" or
"Analyzer maintenance request".
The automatic reference recording cannot be interrupted. If the cancellation
criterion is canceled, the reference entered is dismissed. If the FTIR reports
that the reference is not OK, it is also dismissed, even if no cancelation crite-
rion is fulfilled.
Automatic recording of the reference takes about 18 minutes.
| OI/ACF5000-EN REV. A
sensor (see page 88).
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