Electric measurements with LabVIEW

Abstract: The paper presents a data acquisition system which consists in Hall effect sensors, a PCI 6023(National Instruments) data acquisition board, Lab VIEW graphical programming environment and the experimental results achieved by the authors concerning the behavior of ac electrical circuits. The instruments used in the measurement technique were developed as computer data base equipments, using well determined functions (the acquisition of parameters, signal processing/adapting) with the communication possibility on a serial interface or on a parallel port. Today, data acquisition boards are used and can be assembled directly into the computer, having the operation possibility of an oscilloscope. The appearance of the LabVIEW environment was motivated by the research automation activity and by the application development, based on a hierarchical instrument structure, which is composed by the user's interface and the visual programming elements.