| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an infrared gas analysis meter, whose comparison signal is hardly influenced by magnitude of a measurement signal. <P>SOLUTION: A sector 2 is driven and rotated. An infrared light from a light source 4 is irradiated on a sample cell 1a twice via transmission windows 2a-1, 2a-2, 2b-1, 2b-2, is irradiated on a comparison cell 1b twice and is irradiated on the sample cell 1a twice. The operation is repeated, and detection signals per two periods are obtained. Since a first period signal is interfered by a previous signal, the first period signal is not used and a concentration calculation is implemented, based on a signal during the following period. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
