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Information × Registration Number 0218U003359, 0117U002952 , R & D reports Title Development of the State Primary Standard unit of liquids density popup.stage_title Head Ovchar Lyudmyla Oleksandrivna, Registration Date 02-02-2018 Organization Ukrainian State Research and Production Centre for Standardization, Metrology and Sertification popup.description2 The theory of density measurements, current state of the density measurements, new designs and prospects of development of reference base in the field of liquids density measurements are considered; the methods of reproducing the liquids density unit and comparison of metrological characteristics of national measurement standards of some leading countries are considered; the generalised structure of the primary standard, the list of main modules and systems are defined, structural and functional schemes of the measurement standard are developed; detailed requirements on design and characteristics of the components of the standard are formulated and sketches of their design are developed; theoretical equations and functions concerning reproduction of the density unit by hydrostatic weighing method are considered; measurement uncertainty budget and its mathematical model for the state primary standard are completed; details are purchased and mounted into the assemblies of the elevating mechanism of the measurement standard, namely, stepping motor with brakes, driver and power supply and ball-and-screw pair with a belt drive; study is performed to choose a working liquid of the standard; mathematical model of an error and uncertainty of the standard is studied; draft documents on the standard, including passport, rules of storage and usage and a procedure of studying the standard are developed. Product Description popup.authors Безпечна Віра Іванівна Бутковська Наталія Юріївна Гаврилкін Володимир Георгійович Овчар Людмила Олександрівна popup.nrat_date 2020-04-02 Close