Instruction Manual
748467-A January 2002
The signal generation is accomplished with a pyroelectrical (solid-state) detector. The detector records the incoming infrared radiation. This radiation is reduced by the absorption of the gas at the corresponding wavelengths. By comparing the measurement and reference wavelength, an alternating voltage signal is produced. This signal results from the cooling and heating of the pyroelectric detector mate- rial.
| 90 |
Transmittance(%) | 75 |
54 60 |
| 30 |
| 15 |
90 | 0 |
72 | |
Transmittance (%) 36 54 | |
18 | |
0 | |
CO2CO
Absorption Band
CO2CO
3000 | 3200 | 3400 | 3600 | 3800 | 4000 | 4200 | 4400 | 4600 | 4800 | 5000 | 5200 | 5400 | 5600 |
| | | | | Wave Length (nm) | | | | | |
Figure 1-1. Absorption Bands of Sample Gas and Transmittance of Interference Filters
Rosemount Analytical Inc. A Division of Emerson Process Management | Description and Specifications | 1-3 |
