42/24-10 EN Rev. 9
Chapter 9: Inspection and Maintenance
9-33
Carrier Gas Alignment
Electronic Carrier
Gas Correction
In principle, the electronic carrier gas correction operates in the same manner as
the cross sensitivity correction (see “Cross Sensitivity Alignment” section,
page 9-32).
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. A
detailed description of the function block
Carrier gas correction
is contained in
the Technical Bulletin “AO2000 Function Blocks – Descriptions and Configuration”
(Publication No. 30/24-200 EN).
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 interference
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 compo-
nent, 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.
