244
AO2000
CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Fidas24: Substitute gas calibration
Example
Substitute gas calibration in the Fidas24 is described using the example
"Acetone measurement in room air".
Acetone measurement in room air
Acetone (C
3
H
6
O) in higher concentrations cannot be filled test gas contain-
ers. For this reason the analyzer module is factory-set for calibration with
the substitute gas propane (C
3
H
8
) in N
2
.
Measuring ranges
Component 1 C
3
H
6
O in room air
Meas. range 1 0 to 10,000 ppm
Component 2 C
3
H
8
in N
2
(substitute gas) Meas. range 1 0 to 10,000 ppm
Calibration parameters
Calibration method
Substitute gas calibration
Zero component
Component 1 C
3
H
6
O
Measuring range 1 or
Component 2 C
3
H
8
Measuring range 1
Span component
Component 1 C
3
H
6
O
Measuring range 1 or
Component 2 C
3
H
8
Measuring range 1
Calibration
•
Calibrate zero with air (component 1 or component 2).
•
Calibrate span with test gas 18 vol.% propane in N
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.
