«Equipment and technologies for oil and gas complex»

Statistical-methodological approaches to ensuring the reliability of calibration

UDC: 658.562.012.7+006.065.3
DOI: -

Authors:

¹ National University of Oil and Gas "Gubkin University", Moscow, Russia

Keywords: verification, calibration, reliability of results, power meter, Schuhart control maps, average map, sample standard deviation map

Annotation:

The authors of the article discuss the advantages of measuring instruments calibration before verification, especially when entering international markets, where compliance with the requirements of GOST ISO/IEC 17025-2019 becomes a key factor. The main attention is paid to ensuring the reliability of calibration results at different points of the dynamic range through the adaptation of the Schuhart control charts construction technique to the procedure of comparing the calibrated measuring instrument with the reference one in relation to it. Using the example of calibration of optical radiation power meters, it is shown how the construction of maps makes it possible to identify system errors (for example, due to optical contamination or human factors), and monitor the stability of measurements of the entire dynamic range. The developed algorithm for constructing control maps allows reflecting the reliability of the calibration works performed, and subsequent analysis of the maps, combined with an operational reduction of random errors impact during calibration, will reflect the availability of important competencies and skills among engineers conducting the comparison. The method proposed in the authors of the article to confirm the reliability of the results and the competences of the staff will help carrying out the transition of laboratories to internationally recognized calibration procedures.

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