Modeling the Operation Process of Measuring Instruments with a Built-In Measurement Accuracy Monitoring Function for the Purpose of Metrological Assurance of Non-Removable Measuring Instruments

Metrological assurance of measuring instruments for which periodic verification and calibration are difficult or impossible (so-called non-removable measuring instruments) is limited to initial verification prior to commissioning. With the development of modern instrumentation, such measuring instruments are becoming increasingly in demand, particularly at hazardous production facilities.

However, there is no methodology for monitoring the accuracy of measurements performed using non-removable measuring instruments. As a consequence, there are also no mechanisms for predicting the technical condition and metrological failure of such measuring instruments.

The aim of this work is to review modern approaches to evaluating the metrological characteristics of non-removable measuring instruments and, based on them, to construct a functional model of the operation process of measuring instruments with a built-in measurement accuracy monitoring function. This model will make it possible to predict metrological failure and improve the reliability of measurement results.

The author analyzed key regulatory documents. The methodological materials included MI 3676-2023 “State System for Ensuring the Uniformity of Measurements. Recommendations for determining calibration intervals for measuring instruments. Basic provisions”; GOST R 8.673–2009 “State System for Ensuring the Uniformity of Measurements. Intelligent sensors and intelligent measuring systems. Basic terms and definitions”; GOST R 8.734–2011 “State System for Ensuring the Uniformity of Measurements. Intelligent sensors and intelligent measuring systems. Methods of metrological self-checking”.

As a result, a generalized model of the operation of measuring instruments with a built-in measurement accuracy monitoring function has been constructed.

The obtained results make it possible to simulate the operation process of developed measuring instruments with a built-in measurement accuracy monitoring function in order to determine the necessary design parameters and the values of normalized metrological characteristics.

The article is intended for practical application by developers, testers, and end users of measuring instruments with a built-in measurement accuracy monitoring function.

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