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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0368-1025it.2022-7-54-57</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-1615</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ТЕПЛОФИЗИЧЕСКИЕ ИЗМЕРЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THERMOPHYSIC MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Модернизация Международной температурной шкалы МТШ-90: тройная точка диоксида углерода вместо тройной точки ртути</article-title><trans-title-group xml:lang="en"><trans-title>Modernization of the International Temperature Scale ITS-90: triple point of carbon dioxide instead of triple point of mercury</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Окладников</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Okladnikov</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виталий Михайлович Окладников</p><p>Москва</p></bio><bio xml:lang="en"><p>Vitaly M. Okladnikov</p><p>Moscow</p></bio><email xlink:type="simple">elemer@elemer.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Полунин</surname><given-names>С. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Polunin</surname><given-names>S. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Петрович Полунин</p><p>Москва</p></bio><bio xml:lang="en"><p>Sergei P. Polunin</p><p>Moscow</p></bio><email xlink:type="simple">polunin@elemer.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бекетов</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Beketov</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Николай Александрович Бекетов</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Nikolay A. Beketov</p><p>St. Petersburg</p></bio><email xlink:type="simple">n.a.beketov@vniim.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Походун</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Pokhodun</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анатолий Иванович Походун</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Anatolii I. Pokhodun</p><p>St. Petersburg</p></bio><email xlink:type="simple">a.i.pokhodun@vniim.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Научно-производственное предприятие «Элемер»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Elemer</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт метрологии им. Д. И. Менделеева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>D. I. Mendeleyev Institute for Metrology (VNIIM)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>13</day><month>05</month><year>2023</year></pub-date><volume>0</volume><issue>7</issue><fpage>54</fpage><lpage>57</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/1615">https://www.izmt.ru/jour/article/view/1615</self-uri><abstract><p>Исследовано одно из направлений совершенствования МТШ-90 – поиск фиксированной температурной точки, альтернативной тройной точке ртути, например тройной точки диоксида углерода. Необходимость данного направления совершенствования обусловлена подписанием в 2013 г. под эгидой ООН Минаматской конвенции о ртути и отказом от производства новых средств измерений на основе ртути (жидкостных ртутных термометров и пр.). Разработана конструкция ампулы для реализации тройной точки диоксида углерода. Приведены методы реализации и результаты исследований воспроизводимости температуры тройной точки диоксида углерода. Результаты исследований показывают перспективность использования температуры тройной точки диоксида углерода в качестве реперной точки МТШ-90 вместо температуры тройной точки ртути, а также возможность применения тройной точки диоксида углерода для калибровки как капсульных, так и стержневых эталонных платиновых термометров сопротивления.</p></abstract><trans-abstract xml:lang="en"><p>One of the directions for improving the ITS-90 is investigated – the search for a fixed temperature point, an alternative to the triple point of mercury, for example, the triple point of carbon dioxide. The need for this direction of improvement is due to the signing in 2013 under the auspices of the UN of the Minamata Convention on Mercury and the refusal to produce new measuring instruments based on mercury (liquid mercury thermometers, etc.). The design of the cell for the implementation of the triple point of carbon dioxide has been developed. Implementation methods and results of studies of the carbon dioxide triple point temperature reproducibility are presented. The research results show that it is promising to use the carbon dioxide triple point temperature as the ITS-90 reference point instead of the mercury triple point temperature, as well as the possibility of using it to calibrate both capsule and long-stem standard platinum resistance thermometers.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>температура</kwd><kwd>реперная точка</kwd><kwd>МТШ-90</kwd><kwd>ртуть</kwd><kwd>диоксид углерода</kwd><kwd>тройная точка</kwd></kwd-group><kwd-group xml:lang="en"><kwd>temperature</kwd><kwd>fixed point</kwd><kwd>ITS-90</kwd><kwd>mercury</kwd><kwd>carbon dioxide</kwd><kwd>triple point</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Mise en pratique for the defi nition of the kelvin in the SI. 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