Performance of Different Light Sources for the Absolute Calibration of Radiation Thermometers

Martín, M. J.; Mantilla, J. M.; Campo, D. del; Hernanz, María Luisa; Aglio, Alicia Pons; Campos, Jesús

doi:10.1007/s10765-017-2271-1

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…Temperature measurement of the cells were made with a LP4 standard radiation thermometer. Since the LP4 is calibrated in spectral responsivity, as explained in [8], and it is referenced to a Cu fixed point blackbody, it can be used to determine t and t 90 temperatures alternatively. Only the final results in Sect.…”

Section: Measurement Of the Cellsmentioning

confidence: 99%

Construction, Characterization and Measurement of Fe–C and Pd–C HTFPs at CEM

et al. 2022

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The current state of the art for temperature realization and dissemination above 1300 K is through the MeP-K-19 [1]. A limited set of high-temperature fixed points (HTFPs), an essential component of the MeP-K-19, has their temperature determined (Co–C (1597 K), Pt–C (1011 K) and Re–C (2747 K)). It is really a need to increase the HTFPs available for realization and dissemination of the high-temperature MeP-K. Fe–C (1426 K) and Pd–C (1765 K) has been less investigated, their thermodynamic temperature hasn’t been definitively determined, and they have been considered good candidates for their inclusion in the MeP-K in the EMPIR project “Real-K” [2]. This paper describes the construction, characterization, and measurement of HTFPs of Fe–C and Pd–C at Centro Español de Metrología as part of its contribution to the EMPIR project “Real-K”. Cells made have hybrid-type crucibles and they have been filled applying the piston method. A series of 6 HTFPs has been constructed: 3 Fe–C and 3 Pd–C. Points of inflection of the melting plateaux are repeatable after several initial measurement cycles. Their corresponding International Temperature Scale (ITS-90) temperatures (t90), referenced to a Cu fixed point, and thermodynamic temperatures (t), by means of the spectral responsivity calibration, have been calculated. Additionally, the influence of the furnace in the temperature assigned to the cells has been determined for different furnaces types (one zone and three zone) and different temperature profiles.

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Section: Measurement Of the Cellsmentioning

confidence: 99%

Construction, Characterization and Measurement of Fe–C and Pd–C HTFPs at CEM

et al. 2022

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“…The standard thermometers are a silicon-detector-based LP4 (650 nm and 900 nm filters) and an InGaAs-detector based LP5 (1550 nm filter) [22,23]. Both are calibrated by comparison with a Si trap radiometer and an InGaAs radiometer, respectively, using the radiance mode [17,24]. The Si trap radiometer and the InGaAs radiometer are calibrated absolutely at IO-CSIC with an electrical substitution cryogenic radiometer.…”

Section: Equipment and Methodologymentioning

confidence: 99%

Methodologies and uncertainty estimates for T – T ₉₀ measurements over the temperature range from 430 K to 1358 K under the auspices of the EMPIR InK2 project

McEvoy¹,

Lowe²,

Underwood³

et al. 2020

Meas. Sci. Technol.

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We report new developments in instrumentation and techniques for both acoustic (speed of sound) and radiometric primary thermometry methods. These include both new cylindrical resonators for extending acoustic gas thermometry to higher temperatures and absolute radiation thermometers incorporating InGaAs detectors to extend primary radiometry to lower temperatures than can be achieved using Si-detector based instruments. These new approaches have been established in order to determine the difference between thermodynamic temperature, T, and the International Temperature Scale of 1990 (the ITS-90), T90, over the temperature range from 430 K to 1358 K as part of the three-year EMPIR project 'Implementing the new kelvin 2' (InK2). This paper describes the facilities and measurement methodologies for measuring T -T90 at each of the different institutes, along with an assessment of the target uncertainties. The work is ongoing, but we anticipate that the results of these measurements will ultimately be pooled to provide consensus values of T -T90 with associated estimated uncertainties. These consensus values will initially feed into the technical annex of the mise en pratique for the definition of the kelvin (MeP-K-19) and, if required, will be used to help to provide a foundation for any future temperature scale.

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“…In the last years, CEM, in collaboration with Instituto de Optica of Consejo Superior de Investigaciones Científicas (IO-CSIC), has developed a setup for absolute calibration of standard radiation thermometers using the radiance method at 650 nm [3]. The aim is twofold: to realise and disseminate the new definition of the kelvin and to perform the assignement of the thermodynamic temperature to fixed points [4].…”

Section: T90 Measurements and Dissemination From Ag To 2800 °Cmentioning

confidence: 99%

“…In order to carry out these measurements a system based in a monochromator or/and a laser and an integratingsphere is used to calibrate the CEM standard RTs (KE-LP2 and LP4) [3]. The setup is shown in figure 2.…”

Section: T90 Measurements and Dissemination From Ag To 2800 °Cmentioning

confidence: 99%

Overview of measurements capabilities in radiation thermometry at CEM (Spain)

Martín

Mantilla

Campo

2019

19th International Congress of Metrology (CIM2019)

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CEM (Spanish National Institute of Metrology) is responsible for the maintenance and dissemination of the temperature national standards. Nowadays, the CEM Radiation Thermometry Laboratory disseminates and maintains the International Temperature Scale of 1990 (ITS-90) from the Ag fixed point (961.78 °C) to 2800 °C, using Ag or Cu fixed points as reference and standard radiation thermometers (RTs) working at a wavelength of 650 nm. CEM is also able to provide traceability to the new definition of the kelvin and to perform measurements of thermodynamic temperature from 400°C to 2800°C with different RTs (wavelengths of 650 nm, 900 nm and 1550 nm) using absolute and relative primary radiation thermometry. In addition the Radiation Thermometry laboratory performs calibration of RTs working in the usual infrared ranges (1 μm and 10 μm) from – 40°C to 1600°C.

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Performance of Different Light Sources for the Absolute Calibration of Radiation Thermometers

Cited by 9 publications

References 5 publications

Construction, Characterization and Measurement of Fe–C and Pd–C HTFPs at CEM

Construction, Characterization and Measurement of Fe–C and Pd–C HTFPs at CEM

Methodologies and uncertainty estimates for T – T ₉₀ measurements over the temperature range from 430 K to 1358 K under the auspices of the EMPIR InK2 project

Overview of measurements capabilities in radiation thermometry at CEM (Spain)

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Performance of Different Light Sources for the Absolute Calibration of Radiation Thermometers

Cited by 9 publications

References 5 publications

Construction, Characterization and Measurement of Fe–C and Pd–C HTFPs at CEM

Construction, Characterization and Measurement of Fe–C and Pd–C HTFPs at CEM

Methodologies and uncertainty estimates for T – T 90 measurements over the temperature range from 430 K to 1358 K under the auspices of the EMPIR InK2 project

Overview of measurements capabilities in radiation thermometry at CEM (Spain)

Contact Info

Product

Resources

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Methodologies and uncertainty estimates for T – T ₉₀ measurements over the temperature range from 430 K to 1358 K under the auspices of the EMPIR InK2 project