GE b30 - Functional Description; Measurement Principle; Main Components

Functional description
8-5
Document no. 2044677-001
3 Functional description
3.1 Measurement principle
3.1.1 CO
2
measurement
MiniC is a side stream gas analyzer, measuring real time concentrations of CO
2.
It is a non
dispersive infrared analyzer, measuring absorption of the gas sample using an optical narrow
band filter.
The infrared radiation detector is thermopile.
Concentration of CO
2
is calculated from absorption measured at 4.2 to 4.3 µm.
Figure 2 Absorbance of CO
2
3.2 Main components
The miniC unit in N-FC and N-FCREC modules consists of:
− Gas sampling system
− MiniC measuring unit
− CPU board
The recorder unit in N-FREC and N-FCREC consists of:
− Recorder board
− Thermal printer