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State Primary Standard of the Unit of Infrared Radiance GET 48-2018
https://doi.org/10.32446/0368-1025it.2022-7-13-17
Abstract
The stages of development and improvement of the upper link in the reference base for metrological support of measuring means for total radiance are considered. The basic principles of reproduction and transmission of a unit of total radiance are stated. Increasing requirements for metrological support of measuring means for an total radiance led to the creation of the new state primary standard for the unit of Infrared Radiance GET 48-2018. A description of GET 48-2018 and its constituent blackbody type based on phase transitions of pure substances: mercury, water, gallium, indium, tin, zinc, aluminum and copper, as well as radiometer-comparators used to transfer a unit of radiance to the working standards and the means of measurement is given. A description of the designs of black body emitters and equipment for the implementation of the required thermal regime is given. The investigations have shown high long-term stability and reproducibility of the developed blackbody emitters based on the reference points of pure substances. To increase the sensitivity and reduce noise in order the optical scheme in the radiometer-comparators has been improved, modern optical-acoustic radiation receivers (Golay cells) and synchronous amplifiers have been used to process the measured signal. It to reduce the error in transfer of an unit of radiance.
Conducted studies within aimed at maintaining the modern scientific and technical level of the metrological characteristics of the primary standard and its components confirm that the values of total radiance, which are 54.36; 100.39; 151.80; 614.96; 1173.4; 4151.0; 13691 and 61282 W/(sr.m2) are reproduced by the standard with an expanded uncertainty, not more than 1.5.10–3 relative units. The state primary standard of the unit of infrared radiance GET 48-2018 leads the system of metrological support for measuring instruments of an energy radiance, which are widely used in the military-industrial complex, space exploration, life support and environmental protection.
About the Authors
A. I. Pokhodun
D. I. Mendeleyev Institute for Metrology (VNIIM)
Russian Federation
Russian Federation
Anatolii I. Pokhodun
St. Petersburg
I. A. Sild
D. I. Mendeleyev Institute for Metrology (VNIIM)
Russian Federation
Russian Federation
Iurii A. Sild
St. Petersburg
E. V. Vizulaynen
D. I. Mendeleyev Institute for Metrology (VNIIM)
Russian Federation
Russian Federation
Evgeniy V. Vizulaynen
St. Petersburg
M. A. Ivanova
D. I. Mendeleyev Institute for Metrology (VNIIM)
Russian Federation
Russian Federation
Mariya A. Ivanova
St. Petersburg
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Review
For citations:
Pokhodun A.I., Sild I.A., Vizulaynen E.V., Ivanova M.A. State Primary Standard of the Unit of Infrared Radiance GET 48-2018. Izmeritel`naya Tekhnika. 2022;(7):13-17. (In Russ.) https://doi.org/10.32446/0368-1025it.2022-7-13-17
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