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Information × Registration Number 0224U002091, 0119U001281 , R & D reports Title Development of scientific bases for increasing the accuracy of conductometric measurements with reference dual electrode cells popup.stage_title Head Mikhal Oleksandr Oleksiyovych, Кандидат технічних наук Registration Date 05-02-2024 Organization Institute of Electrodynamics of the National Academy of Sciences of Ukraine popup.description2 The object of research is the processes of measurement conversion in precision two-electrode Jones conductometric cells (KD). The field of use is metrology of the highest level, national standards. The effectiveness of the implementation is conditioned by ensuring the independence of Ukraine in the field of metrological support of means of measuring the conductivity of liquid media. The purpose of the work is to improve the characteristics of the state standard unit of electrolytic conductivity and ensure the calibration of working tools with higher accuracy in a wide range of concentrations of electrolyte solutions. Research methods — computer modeling using finite element methods for calculating Laplace's differential equations; electrical modeling using the information theory of measurements, theoretical foundations of electrical engineering. The relevance of the work is determined by the need to preserve the unit of measurement of EP dissolved electrolytes over a longer time interval and the need to improve the efficiency of the system of transferring the size of the unit of electrolytic conductivity in Ukraine by providing it with standards of the appropriate level. The main results of the work are: - establishment of shortcomings of the reference KD of the leading countries of the world, in particular, significant measurement errors (0.08% when the tubes are displaced by 0.6 mm); - development of the principles of construction of differential KD with a calculated constant, namely an idealized cell model and three mathematical models for calculating corrections; - development of a new method of measuring EP, which allows controlling the influence of electrochemical impedance on the measurement result; - development of the method of multi-loop automatic balancing systems; - in the selection of new constructive solutions and the creation of an experimental sample of differential KD, which has legibility, tightness of the structure and calculability of the consta Product Description popup.authors Yevdokymov Mykhaylo S. Mikhal Oleksandr O. Meleshchuk Dmytro V. popup.nrat_date 2024-02-05 Close