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Magnos27: Substitute Gas Calibration
Example
Oxygen Measurement
in Flue Gas
Test Gases
Calibration with
Substitute Gases
Measurement Ranges
Calibration Parameters
Calibration
Other Measurement
Tasks
8-C-12
Substitute gas calibration of the Magnos27 analyzer module is described using
the example of Oxygen Measurement in Flue Gas.
The sample gas composition is known in the case of oxygen measurements in flue
gas.
Zero Gas: 16 Vol.-% CO
Span Gas: 10 Vol.-% O
2
Since these test gases are not available everywhere, the analyzer module is
factory-set for calibration with a substitute gas.
In this case an additional measurement range is calibrated for 0-25 Vol.-% O
N
(N
and O
/N
mixtures are available practically everywhere).
2
2
2
2
Component 1
O
in flue gas
2
Component 2
O
in N
2
Calibration Method
Zero Component
Span Component
• Calibrate zero with N
2
• Calibrate span with dried air (containing 20.96 Vol.-% O
mixture.
For other measurement tasks select the test gases and measurement ranges in a
similar manner according to the sample gas composition.
Chapter 8: Gas Analyzer Calibration
in N
2
2
and 8.3 Vol.-% CO
in N
2
Meas. Range 1
Meas. Range 2
(Substitute Gas)
Meas. Range 1
2
Substitute Gas Calibration
Component 2 Meas. Range 1
Component 2 Meas. Range 1
(component 2).
2
0-5 Vol.-%
0-10 Vol.-%
0-25 Vol.-%
) or with an O
2
2
42/24-10 EN Rev. 9
in
2
/N
2
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