Comparative analysis of different methods of processing measuring results for calibrating standard deadweight pressure gauges

Interlaboratory comparative tests are an important means of testing the quality of metrological services, provided by calibration laboratories. In many cases, when conducting interlaboratory comparisons, it is necessary to develop or coordinate calibration methods, used by the participating laboratories. In the area of excess pressure measurements, when determining the effective area of measuring piston systems of pressure gauges when transferring a unit of magnitude, GOST 8.479–82 and OIML R 110 with different estimation algorithms are used. The aim of this article is to carry out a comparative analysis of processing algorithms for determining the effective area of the piston and justifying the choice of the preferred algorithm for transmitting the pressure unit. Results of carrying out the work show that both of the analyzed algorithms are special cases of using the weighted least squares method with a different choice of mass. Application of the algorithms is illustrated by the calculations for the measurement results obtained during calibration. The advantage of one of the algorithms is shown. Relevance of the paper lies in the fact that it is aimed at solving a currently important issue concerning harmonization of methods for evaluating measuring results adopted in national and international regulatory documents.