METHODOLOGICAL ASPECTS OF TOOL CALIBRATION MEASURING TECHNIQUES OF GEOMETRIC QUANTITIES

Abstract

The purpose of this work is to develop a procedure for calibrating measuring instruments (MI) of geometric quantities, in particular micrometers and linear displacement indicators (indicators), which involves, among other things, compiling a model equation (mathematical model), forming a budget and assessing the uncertainty of measurement results. Ensuring the unity and metrological traceability of measurement results is one of the main tasks of calibration laboratories during the calibration of measuring instruments. Calibration of measuring instruments is carried out in accordance with calibration methods. The introduction of international documents regulating the accreditation and activities of calibration laboratories provides for the possibility for these laboratories to develop their own (non-standardized) methods for calibrating measuring instruments with their subsequent validation (assessment of suitability for use). If the customer does not specify the method (methodology) that must be used during the calibration of a measuring instrument, it is recommended to use the appropriate methods (methodologies) published in international, regional or national standards, or issued by authoritative technical organizations, or published in relevant scientific literature or journals, or those specified by the equipment manufacturer. The work provides methods and means, the procedure for calibrating micrometers and linear displacement indicators, determining the metrological characteristics of the specified measuring instruments, compiling a mathematical model, forming a budget and assessing the measurement uncertainty based on the calibration results. The material provides practical recommendations to calibration laboratories on the development of non-standardized methods for calibrating measuring instruments of geometric quantities, in particular micrometers and linear displacement indicators.