THE HOUSEHOLD GAS METERS STATISTICAL INFORMATION MODELS INVESTIGATION
Keywords:household gas meter, information model, error, consumption, metrological studies, statistical estimation
The relevance of the development and research of household gas meters (HGM) information models, based on the study of statistical patterns of changes in their metrological characteristics under operating conditions, is considered. The main informative parameter for statistical studies is the selected HGM error when measuring the gas volume at the minimum passport operating expenses, which is determined experimentally during periodic calibration of the HGM using reference calibration facilities. The principles of the formation of samples of HGM for statistical studies are disclosed. A metrological analysis of the results of statistical studies for membrane slant gauges of G4 and G6 sizes, models GALLUS (France), METRIX (Poland), SAMGAS (Ukraine) was carried out. Statistical regularities and quantitative values of changes in the errors of HGM are established, confirming the similarity of changes in the errors of HGM of various manufacturers after the completion of their verification period of operation. The absence of correlation between the change in the error of HGM in the flow range from the minimum to 20% of the maximum and in the second flow range - 20% from the maximum flow to the maximum is revealed. The histograms were constructed, reflecting the regularities of changes in membrane HGM, the error of which at the minimum flow rate varies from minus 30% to plus 3%. The number of the METRIX model G4 and G6 counters that are suitable for further operation after calibration is statistically estimated. A comparative analysis of the laws of change in the error for these sizes of counters has been carried out. The results of statistical studies of the error membrane HGM from the duration of their operation. The statistical regularities of the influence of the intensity of the functioning of membrane HGM are characterized according to the results of measured gas volumes during the intertest period.