Abstract
A new conceptual approach to determining the error of a household gas meters in the entire flow rate range is considered. This involves the experimental determination of the error for a limited operating flow rate range that also includes two normalized flow rates, which correspond to a minimum flow rate and 20 % of maximum flow rate for a specific size of a household flow meter. The operational error at the third normalized maximum flow rate is determined on the basis of methodological approach with statistical estimation.The algorithms of practical realization for two areas of methodological approach with statistical estimation that can be used for determining the error of the household meters in operating conditions at the maximum operating flow rate are considered and metrologically evaluated.The quantitative estimation of the error in determining the metrological characteristics of the household meters at the maximum flow rate according to the first area of the concept, taking into account the general increment in the error variation with all the selected ranges of the error at the minimum flow rate, showed that it practically does not exceed one third (±0.7 %) of the error (±2 %) at the maximum flow rate that indicated in the certificate for the household meter. This justifies the possibility of practical application of this concept in estimating the metrological characteristics of household meters in the entire operating flow rate range.The quantitative estimation of the error in determining the metrological characteristics of the household meters at the maximum flow rate according to the second area of the concept, which involves estimation of household meters’ error at the maximum operating flow rate using the interpolation dependence of the error increment estimation from its value at minimum flow rate range, shows that this error exceeds the error indicated in the certificate for the household meter (±2 %) at the maximum flow rate. Practical application of this concept is possible only after its algorithmic and methodological improvement.The possibility of technical realization, conditions and prospects of practical application of each area of the new concept for estimating the measurement accuracy of household gas meters in the entire flow rate range is substantiated.
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