The application of modern electronic solutions and microprocessor technologies has significantly improved measuring methods and devices for instrument transformers accuracy testing. PC hardware and software application options in this filed of measuring techniques significantly increase reliability, efficiency and accuracy. This paper presents the role and importance of software application in instrument transformer accuracy testing that have been developed by the Electrical Engineering Institute “Nikola Tesla”.

The paper presents the technique of Virtual Instrument design to obtain Real-Time mode. Application of the ETS approach to configure Real-Time instrument is presented and its requirements pointed out. Design of the virtual spectrum analyzer using the ETS technique is described. Detailed analysis of the designed instrument, considering ability to work in Real-Time mode, is conducted. The comparison between the ETS solution and formerly examined, traditional, approach is performed. Conclusions about the abilities of ETS RT virtual instruments and their practical applications are presented.

A vision-based measurement system for the online inspection of automotive rubber profiles is described. The system determines a 3-D reconstruction of the rubber profile section and performs dimensional measurements. After a brief description of the whole measurement system, the main novelties are pointed out: the simple calibration procedure and the flexible tools allowing users to specify the dimensional measurements regardless of the type of the profile to be inspected.

The paper presents an extension of the “blind correction” method with respect to nonstationary transducers of the first order. An analytical description of the measuring channels’ dynamics is presented for the case where both: the measured signal and the measuring channels’ parameters are varying with same fundamental frequency. The influence of the measuring system parameters on the correction accuracy was investigated using the simulation methods.

The purpose of this paper is the presentation of new requirements created by contemporary applications of electrolytic conductivity measurements, the main factors limiting accuracy of such measurements and also discussion of the means enabling minimization of effects caused by these factors. Recently observed demand for accurate microscale conductivity measurements, mainly in biomedical engineering, involves new features required from the conductivity sensors and co-operating electronics: miniaturization, robustness, low price (mass produced, disposable devices). Consequently, a new approach in designing such instrumentation is required.