Naslov
Primarna realizacija temperaturne ljestvice od trojne točke argona do trojne točke vode
(Primary realization of the temperature scale from the triple point of argon to the triple point of water)

Autori
Matas, Ivan ; Grgec Bermanec, Lovorka ; Šestan, Danijel

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Knjiga sažetaka 16. međunarodne konferencije "Kompetentnost laboratorija" CROLAB 2021 / Grgec Bermanec, Lovorka - : CROLAB - Hrvatski laboratoriji, 2021, 43-44

ISBN
978-953-7329-24-2

Skup
16. međunarodna konferencija: Kompetentnost laboratorija (CROLAB 2021)

Mjesto i datum
Brijuni, Hrvatska, 13.10.2021. - 16.10.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
temperatura, primarna realizacija, ITS-90, trojna točka argona
(temperature, primary realization, ITS-90, triple point of argon)

Sažetak
The independent primary realization of the temperature scale (ITS-90) in the Laboratory for Process Measurement (LPM), as the national temperature standard, is achieved in the range from the triple point of mercury (-38.8344 °C) to the freezing point of copper (1084.62 °C). To be able to participate in the scientific metrological projects and comparisons in the field of low temperature measurement, LPM is developing a new measurement system for the realization of the triple point of argon (-189.3442 °C). This includes design and characterization of the system along with the definition of the of the associated experimental method and measurement uncertainty assessment of the realization. For the realization of the triple point of argon, sealed fixed point cell for accommodating long-stem platinum resistance thermometers, was selected, as this type of thermometers represent the backbone of traceability dissemination at LPM. Fixed point cell is going to be immersed in cryostat filled with liquid nitrogen and conditions for the realization of the triple point of argon will be achieved through the automatic regulation of the outflow of nitrogen vapours from the cryostat. Performance of the measurement system will be verified through the bilateral comparison with the equivalent temperature standard. Development of this system will ensure traceability of temperature measurement in the range from triple point of argon to the triple point of water (0.01 °C), along with the improvement of low temperature measurement capabilities. Furthermore, involvement in the process of thermodynamic temperature approximation will be enabled, with the respect to the recent redefinition of kelvin as well.

Izvorni jezik
Hrvatski

Znanstvena područja
Strojarstvo

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