A New Primary Dew-Point Generator at TUBITAK UME

S. Oğuz Aytekin, N. Karaböce, M. Heinonen, H. Sairanen

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    An implementation of a new low-range primary humidity generator as a part of an international collaboration between TUBITAK UME and VTT MIKES was initiated as a EURAMET Project Number 1259. The dew-point generator was designed and constructed within the scope of the cooperation between TUBITAK UME and VTT MIKES in order to extend the dew-point temperature measurement capability of Humidity Laboratory of TUBITAK UME down to − 80 °C. The system was thoroughly characterized and validated at TUBITAK UME to support the evidence for dew-point temperature uncertainties. The new generator has a capability of operating in the range of − 80 °C to +10 °C, but at the moment, it was characterized down to − 60 °C. The core of the generator system is a saturator which is fully immersed in a liquid bath. Dry air is supplied to the saturator through a temperature-controlled pre-saturator. The operation of the system is based on the single-pressure generation method with a single pass, i.e., the dew-point temperature is only controlled by the saturator temperature, and the humidity-controlled air is not returned to the system after leaving of the saturator. The metrological performance of the saturator was investigated thoroughly at both National Metrology Institutes. The pre-saturator was also tested using a thermostatic bath at VTT MIKES prior to sending them to TUBITAK UME. This paper describes the principle and design of the generator in detail. The dew-point measurement system and the corresponding uncertainty analysis of the dew-point temperature scale realized with the generator in the range from − 60 °C to 10 °C is also presented.

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    dew point
    generators
    humidity
    baths
    temperature scales
    temperature
    air
    metrology
    temperature measurement
    moments
    liquids

    Keywords

    • Dew-point generator
    • Humidity standard
    • Saturator

    OKM Publication Types

    • A1 Refereed journal article

    OKM Open Access Status

    • 0 Not Open Access

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Oğuz Aytekin, S. ; Karaböce, N. ; Heinonen, M. ; Sairanen, H. / A New Primary Dew-Point Generator at TUBITAK UME. In: International Journal of Thermophysics. 2018 ; Vol. 39, No. 5.
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    title = "A New Primary Dew-Point Generator at TUBITAK UME",
    abstract = "An implementation of a new low-range primary humidity generator as a part of an international collaboration between TUBITAK UME and VTT MIKES was initiated as a EURAMET Project Number 1259. The dew-point generator was designed and constructed within the scope of the cooperation between TUBITAK UME and VTT MIKES in order to extend the dew-point temperature measurement capability of Humidity Laboratory of TUBITAK UME down to − 80 °C. The system was thoroughly characterized and validated at TUBITAK UME to support the evidence for dew-point temperature uncertainties. The new generator has a capability of operating in the range of − 80 °C to +10 °C, but at the moment, it was characterized down to − 60 °C. The core of the generator system is a saturator which is fully immersed in a liquid bath. Dry air is supplied to the saturator through a temperature-controlled pre-saturator. The operation of the system is based on the single-pressure generation method with a single pass, i.e., the dew-point temperature is only controlled by the saturator temperature, and the humidity-controlled air is not returned to the system after leaving of the saturator. The metrological performance of the saturator was investigated thoroughly at both National Metrology Institutes. The pre-saturator was also tested using a thermostatic bath at VTT MIKES prior to sending them to TUBITAK UME. This paper describes the principle and design of the generator in detail. The dew-point measurement system and the corresponding uncertainty analysis of the dew-point temperature scale realized with the generator in the range from − 60 °C to 10 °C is also presented.",
    keywords = "Dew-point generator, Humidity standard, Saturator",
    author = "{Oğuz Aytekin}, S. and N. Karab{\"o}ce and M. Heinonen and H. Sairanen",
    year = "2018",
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    doi = "10.1007/s10765-018-2375-2",
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    journal = "International Journal of Thermophysics",
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    A New Primary Dew-Point Generator at TUBITAK UME. / Oğuz Aytekin, S.; Karaböce, N.; Heinonen, M.; Sairanen, H.

    In: International Journal of Thermophysics, Vol. 39, No. 5, 62, 01.05.2018.

    Research output: Contribution to journalArticleResearchpeer-review

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    T1 - A New Primary Dew-Point Generator at TUBITAK UME

    AU - Oğuz Aytekin, S.

    AU - Karaböce, N.

    AU - Heinonen, M.

    AU - Sairanen, H.

    PY - 2018/5/1

    Y1 - 2018/5/1

    N2 - An implementation of a new low-range primary humidity generator as a part of an international collaboration between TUBITAK UME and VTT MIKES was initiated as a EURAMET Project Number 1259. The dew-point generator was designed and constructed within the scope of the cooperation between TUBITAK UME and VTT MIKES in order to extend the dew-point temperature measurement capability of Humidity Laboratory of TUBITAK UME down to − 80 °C. The system was thoroughly characterized and validated at TUBITAK UME to support the evidence for dew-point temperature uncertainties. The new generator has a capability of operating in the range of − 80 °C to +10 °C, but at the moment, it was characterized down to − 60 °C. The core of the generator system is a saturator which is fully immersed in a liquid bath. Dry air is supplied to the saturator through a temperature-controlled pre-saturator. The operation of the system is based on the single-pressure generation method with a single pass, i.e., the dew-point temperature is only controlled by the saturator temperature, and the humidity-controlled air is not returned to the system after leaving of the saturator. The metrological performance of the saturator was investigated thoroughly at both National Metrology Institutes. The pre-saturator was also tested using a thermostatic bath at VTT MIKES prior to sending them to TUBITAK UME. This paper describes the principle and design of the generator in detail. The dew-point measurement system and the corresponding uncertainty analysis of the dew-point temperature scale realized with the generator in the range from − 60 °C to 10 °C is also presented.

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    KW - Humidity standard

    KW - Saturator

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    DO - 10.1007/s10765-018-2375-2

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