ABB Advance Optima magnos206 - Magnos27: Substitute Gas Calibration

8-C-12 Chapter 8: Gas Analyzer Calibration 42/24-10 EN Rev. 9
Magnos27: Substitute Gas Calibration
Example Substitute gas calibration of the Magnos27 analyzer module is described using
the example of Oxygen Measurement in Flue Gas.
Oxygen Measurement
in Flue Gas
The sample gas composition is known in the case of oxygen measurements in flue
gas.
Test Gases Zero Gas: 16 Vol.-% CO
2
in N
2
Span Gas: 10 Vol.-% O
2
and 8.3 Vol.-% CO
2
in N
2
Calibration with
Substitute Gases
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
2
in
N
2
(N
2
and O
2
/N
2
mixtures are available practically everywhere).
Component 1 O
2
in flue gas Meas. Range 1 0-5 Vol.-%
Meas. Range 2 0-10 Vol.-%
Measurement Ranges
Component 2 O
2
in N
2
(Substitute Gas) Meas. Range 1 0-25 Vol.-%
Calibration Method Substitute Gas Calibration
Zero Component Component 2 Meas. Range 1
Calibration Parameters
Span Component Component 2 Meas. Range 1
Calibration • Calibrate zero with N
2
(component 2).
• Calibrate span with dried air (containing 20.96 Vol.-% O
2
) or with an O
2
/N
2
mixture.
Other Measurement
Tasks
For other measurement tasks select the test gases and measurement ranges in a
similar manner according to the sample gas composition.