8-C-10 Chapter 8: Gas Analyzer Calibration 42/24-10 EN Rev. 9
Magnos206: Substitute Gas Calibration
Example Substitute gas calibration of the Magnos206 analyzer module is described using
the example of purity measurement of CO
2
.
Purity Measurement
of CO
2
For CO
2
purity measurements, the smallest concentrations of O
2
are measured in
CO
2
, e.g. 0-1 Vol.-% O
2
in CO
2
.
Calibration with
Substitute Gases
Since O
2
in CO
2
is not available as a test gas and, due to the O
2
zero shift caused
by CO
2
(see “Magnos206 Operating Specifications” section, page A-2-4), the
analyzer module is factory-set for calibration with 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 CO
2
Meas. Range 1 0-1 Vol.-%
Meas. Range 2 0-15 Vol.-%
Meas. Range 3 0-25 Vol.-%
Meas. Range 4 0-100 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 1 Meas. Range 1 or
Component 2 Meas. Range 1
Calibration Parameters
Span Component Component 2 Meas. Range 1
Calibration • Calibrate zero with CO
2
(component 1) or N
2
(component 2).
• Calibrate span with dried air (containing 20.96 Vol.-% O
2
).
Other Measurement
Tasks
For other measurement tasks select the test gases and measurement ranges in a
similar manner according to the sample gas composition.