INVESTIGATION OF THE METHOD OF ADJUSTING THE CALIBRATION PERIOD OF MEASURING EQUIPMENT BASED ON THE REACTION METHOD

Abstract

The article investigates the method of adjusting the calibration period of measuring equipment based on the reaction method. The concept of calibration and approaches to calibration is structured. The main components of the influence of the number of calibrations on the overall production cycle are determined. The stages and principles of adjusting the calibration period of measuring equipment from determining the required number of units of measuring equipment for testing to the mechanisms of application of mathematical statistics to the obtained values, in order to find the sample mean and sample standard deviation, taking into account instability on the sample characteristics of the distribution of instability of metrological features of measuring equipment units. A meter of complex transmission coefficients (vector circuit analyzer) P2-116 was chosen as a measuring device for the study. It is noted that the method of adjusting the calibration period is based on the method of reactions, which is based on the study of the parameters of the device in accordance with changing conditions. It is emphasized that the change in operating conditions is to convert the port impedance, turn on the circuit and turn it off. Schemes of realization of each approach are formed. The principles of work with sampling of the received values and their processing according to a method of adjustment of the period of calibration of the measuring instrument are mathematically substantiated. The obtained values were grouped by serial numbers of inspections, starting with the manufacture or repair of measuring equipment in order to adjust the calibration period. The tabular form presents the test results of thirty meters of complex transmission coefficients (vector circuit analyzer) with which, using statistical processing of the results of the coverage interval for each group, the calculation of basic mathematical indicators. Based on the calculation, a system of equations is presented, the solution of which allowed to obtain the values of the coefficients required to establish the calibration period. Comparing the results with those stated in the technical documentation by the manufacturer, it is emphasized that the need to adjust the calibration period of measuring equipment is an indisputable fact, as increasing the period is cost-effective for the company that uses this equipment in its own production.