| Journal: | Revista mexicana de física |
| Database: | PERIÓDICA |
| System number: | 000381246 |
| ISSN: | 0035-001X |
| Authors: | Cárdenas García, D1 |
| Institutions: | 1Centro Nacional de Metrología, Querétaro. México |
| Year: | 2015 |
| Season: | Mar-Abr |
| Volumen: | 61 |
| Number: | 2 |
| Pages: | 74-76 |
| Country: | México |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, teórico |
| English abstract | For temperatures below silver fixed-point defined by the International Temperature Scale of 1990, a transfer radiation thermometer can be calibrated using either of two calibration schemes: a variable temperature blackbody with a standard platinum resistance thermometer as a reference, or with a set of fixed-point blackbodies. CENAM is presently working with the first scheme, and it is developing fixed-point blackbodies to have the capability to work with the second scheme too. For this purpose a gallium fixed-point blackbody to calibrate CENAM's transfer radiation thermometer was designed and constructed. The blackbody cavity has a cylindro-cone shape with effective emissivity equal to 0.9992 ± 0.0004 in the 8 μm to 14 μm wavelength range. The radiance temperature of the gallium fixed-point blackbody was estimated to have an expanded uncertainty of 54 mK, with a coverage factor k = 2 |
| Disciplines: | Física y astronomía |
| Keyword: | Física de materia condensada, Escala internacional de temperatura de 1990, Cuerpo negro, Termometría de radiación |
| Keyword: | Physics and astronomy, Condensed matter physics, International temperature scale of 1990, Blackbody, Radiation thermometry |
| Full text: | Texto completo (Ver PDF) |
