CURRENT PROBLEMS OF ASSESSING METROLOGICAL RELIABILITY OF FLOW METERS AND LIQUID METERS 

Albina E. Shafigina, Quality management system engineer, All-Russian Scientific Research Institute of Flowmetry – branch of the D.I. Mendeleev All–Russian Scientific Research Institute of Metrology (7а 2nd Azinskaya steet, Kazan, Russia); postgraduate student, Kazan National Research Technical University named after A.N. Tupolev (10 K. Marks street, Kazan, Russia), E-mail: shafigina.98@mail.ru
Aleksey I. Soyko, Candidate of technical science, associate professor of the sub-department of electronic instrumentation and quality management, Kazan National Research Technical University named after A.N. Tupolev (10 K. Marks street, Kazan, Russia), E-mail: alexsoiko@yandex.ru 

Background. Metrological reliability of measuring instruments for flow, flow and volume parameters of liquid is an important criterion in process of choosing measuring instruments; determines the service life of measuring instruments and affects the accuracy and reliability of measurements. The purpose of the work is to analyze the subject area in assessing the metrological reliability of flow meters and liquid meters in the field of energy accounting. Materials and methods. Analysis of existing regulatory documents, comparison of methods for calculating and determining metrological reliability indicators reflected in scientific papers, and their connection with the establishment of intervals between verifications. The features of the development of test methods for determining metrological reliability indicators are considered. Results and conclusion. A conclusion is made about the need to develop regulatory documents that would be the basis for the development of group and individual methods for conducting life tests of measuring instruments, the main approaches to determining metrological reliability indicators and their application features are analyzed. The possibility of using the results of life tests when establishing dynamic intervals between verifications is analyzed. 

metrological reliability, flow meters, liquid meters, measuring instruments, interval between verifications, life tests 

Shafigina A.E., Soyko A.I. Current problems of assessing metrological reliability of flow meters and liquid meters. Izmerenie. Monitoring. Upravlenie. Kontrol' = Measuring. Monitoring. Management. Control. 2024;(3):54–63. (In Russ.). doi: 10.21685/2307-5538-2024-3-7