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Uras26: Notes for Calibrating,
Uras26 with Internal
Cross-Sensitivity
Correction
Wait Until End of
Warm-Up Phase
8-C-14
continued
During calibration cross-sensitivity and / or carrier gas corrections by other meas-
urement components are switched off. Therefore, the following notes should be
observed:
For zero-point calibration all sample components must be calibrated in the
following sequence:
• 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
Cross-sensitivity correction
Sequence for zero-point calibration
For end-point calibration likewise all sample components must be calibrated. In
doing so, a corrected sample component should be calibrated only using a test
gas containing no components which cause cross-sensitivity, i.e. consisting only
of the measurement component and an inert gas like N
The Uras26 analyzer module should only be calibrated after the warm-up phase,
i.e. approx. 2 hours after connecting the power supply.
Chapter 8: Gas Analyzer Calibration
CO
, CH
, C
H
2
4
3
6
CO
by CH
,
2
4
CO
by C
H
,
2
3
6
C
H
not corrected.
3
6
st
nd
rd
1
C
H
– 2
CH
– 3
CO
3
6
4
.
2
42/24-10 EN Rev. 9
.
2
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