262 AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Analyzer with internal cross-sensitivity correction
During calculation possible electronic cross-sensitivity and/or carrier gas
corrections by other measurement components are disabled for the calcula-
tion. The following information should therefore be noted in particular:
All the sample components must always be calibrated in the following se-
quence for the zero-point calibration:
• First that sample component which is not corrected,
• Afterwards that sample component which is affected by the smallest
number of corrections,
• Up to that sample component which is affected by the largest number
of corrections.
Example
Sample components CO
2
, CH
4
, C
3
H
6
Cross-sensitivity correction CO
2
by CH
4
,
CO
2
by C
3
H
6
,
C
3
H
6
is not corrected.
Sequence for zero-point calibration 1. C
3
H
6
, 2. CH
4
, 3. CO
2
.
All the sample components must also always be calibrated in the end-point
calibration. Here, a corrected sample component may only be calibrated
using a test gas contain no components which cause cross-sensitivity, i.e.
which only consists of the sample component and an inert gas, e.g. N
2
.
Wait until the warm-up phase has ended
The analyzer module should only be calibrated after the warm-up phase (see
page 135).