Matviiv R. Portable calibrators for operational control of measurement characteristics

The thesis is devoted to the improvement of voltage calibrators and resistance imitators structures by means of additive errors correction. The analysis of normative documents requirements for voltage and resistance calibrators metrological characteristics was carried out. It was proposed to use a switching inverting method for additive errors correction in voltage and resistance calibrators. The voltage calibrator structure with additive errors correction has been developed. The DC voltage calibrator structure has been improved by using an additional reference voltage source and analogue memory elements which have reduced the impact of transient processes. The research of DC voltage calibrator computer model has been conducted. The DC resistance imitator structure with additive errors correction has been developed. The voltage calibrator structure with a pulse voltage divider, in which the switching inverting method is used for the errors correction, has been proposed. The computer investigation of resistance and voltage calibrator simulator models with pulse width divider were carried out. An experimental model of the DC voltage calibrator with additive errors correction has been created. Experimental studies of the voltage calibrator model were conducted and the optimum frequency of the clock generator was selected for switching elements controlling.