276 AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Carrier gas alignment
Electronic carrier gas correction
In principle, the electronic carrier gas correction operates in the same man-
ner as the electronic cross sensitivity correction (see page 275).
Carrier gas correction is possible only if the cross sensitivity correction
function has been factory-configured per customer order.
Carrier gas correction is similarly configured as a function block application.
The Technical Information "Function Blocks – Descriptions and configura-
tion" contains complete information on the individual function blocks.
Carrier gas correction is an amplification correction.
When should a carrier gas alignment be performed?
A carrier gas alignment, i.e. alignment of the carrier gas correction function,
should not be performed in normal operation.
We recommend checking the carrier gas correction once a year.
Test gas for carrier gas alignment
A gas mixture with the appropriate concentrations of sample and interfer-
ence components is required as the test gas.
Prior to the carrier gas alignment
Prior to the carrier gas alignment, the zero and end points of the applicable
sample and interference components must be calibrated with test gases.
If the interference component influences the zero indication of the sample
component, a cross sensitivity alignment is required prior to the carrier gas
alignment.
Set point entry
Enter the sample component concentration as the set point.
Menu path
MENU → Maintenance/Test → Analyzer spec. adjustm. →
Carrier gas adjustm.
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