Methodology of domestic gas meters metrological control with limited work flow range
DOI:
https://doi.org/10.31471/1993-9981-2020-1(44)-54-64Keywords:
: domestic gas meter, metrological control, natural gas, air, operating flow, error, reference installation, experimental-calculation method.Abstract
The analysis of the current regulatory documents governing the types, conditions and technical means of domestic gas meters metrological characteristics checking during their initial and periodic verification was carried out. The expediency of monitoring the domestic meters metrological characteristics with using of natural gas was substantiated. A new patent-protected methodology has been developed for the experimental-calculation method of metrological assessment of domestic meters with a limited work flow range, which ensures the implementation of dismountable metrological verification of gasmeters in the entire range of operating flow was work out. It provides of the experimental determination of the gasmeters error at the minimal work flow rate and the flow rate, which corresponds to 20% of the maximum, as well as the calculated determination of the gasmeter error at the maximum flow rate using statistically established patterns of change in the errors of domestic gasmeters during their operation with specification of the size and model of the meter. This approach makes it possible to carry out metrological studies of gas meters using natural gas and at the same time without dismantling at the place of operation. The possibilities of applying the proposed methodology for dismantling metrological control of domestic gasmeters during the operation of calibration facilities in the air were revealed, for which the requirements for the upper range of operating flows were reduced. The results of testing the developed methodology for metrological control of domestic gas meters using a limited range of operating flows, which confirmed the correctness of the methodological approach for its practical application. The expediency of developing and approving the relevant regulatory document for the practical implementation of the developed methodology for the metrological research of domestic gas meters, which will comply with the regulatory documents of Ukraine and ensure the implementation of metrological control of natural gas meters in operating conditions, was substantiated.
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