JPS5477187A - Adjustment of ultrared gas analyzer - Google Patents
Adjustment of ultrared gas analyzerInfo
- Publication number
- JPS5477187A JPS5477187A JP14446677A JP14446677A JPS5477187A JP S5477187 A JPS5477187 A JP S5477187A JP 14446677 A JP14446677 A JP 14446677A JP 14446677 A JP14446677 A JP 14446677A JP S5477187 A JPS5477187 A JP S5477187A
- Authority
- JP
- Japan
- Prior art keywords
- measured
- gases
- filter
- ultrared
- span
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007789 gas Substances 0.000 abstract 6
- 238000010521 absorption reaction Methods 0.000 abstract 3
- 230000003287 optical effect Effects 0.000 abstract 3
- 238000006243 chemical reaction Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
PURPOSE:To adjust the zero point and span of an ultrared gas analyzer, while flowing gases to be measured to a sample cell, by using an aptical attenuator of preset attenuation in a wavelength range other than the range to be measured. CONSTITUTION:There is interposed between a sample cell 2 and a detector 4 a narrow band pass filter 3 which allows the ultrared ray of the wavelength range having no absorption by the gases to be measured to pass therethrough. The ultrared ray coming from a light source 1 and passing through the cell 2 and the filter 3 is received by the detector 4, and the gain of an amplifier is so adjusted that the indication takes the maximum of the scale thereby to adjust the zero point. Then, an optical attenuator 4 having the same attenuation as the absorption of the ultrared ray due to the gases of 50 ppm is inserted into an optical path so that the quantity of the light received is measured by the detector 4 to determine the span of 0 to 50 ppm. After the span is determined as in the above, the filter 3 and the attenuator 5 are removed, and a filter allowing the absorption band range of the gases to pass therethrough is inserted into the optical path so that the concentration of the gases passing through the cell 2 may be measured (although requiring conversion).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14446677A JPS5477187A (en) | 1977-12-01 | 1977-12-01 | Adjustment of ultrared gas analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14446677A JPS5477187A (en) | 1977-12-01 | 1977-12-01 | Adjustment of ultrared gas analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5477187A true JPS5477187A (en) | 1979-06-20 |
Family
ID=15362922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14446677A Pending JPS5477187A (en) | 1977-12-01 | 1977-12-01 | Adjustment of ultrared gas analyzer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5477187A (en) |
-
1977
- 1977-12-01 JP JP14446677A patent/JPS5477187A/en active Pending
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