Realization of complex measuring instruments in the LabVIEW program package. Planning LabVIEW applications. Overview of advanced numerical functions. Graphs and diagrams. Advanced functions for working with files. Communication with traditional measuring devices, GPIB and VISA communication. Measuring converters and adapters, categories of measurement signal source. Measuring and acquisition devices for signals. Measurement errors, division of measurement errors according to the cause of formation. Fit measurement data. Linearized two-parameter empirical formulas, the least squares method. Measurement and analysis of signals in the electro-energy network. Signals and systems. Z-transformation. Digital filters, FIR and IIR filters, realization of filters in LabVIEW program. Adaptive filters, Gradient-based adaptive filters, Wiener's condition. Newton's method, the method of the sharpest descent method, the least middle squares method. Methods for measuring the frequency in the EE network. Measuring the frequency of the signal based on measuring the duration of the signal period. Frequency measurement based on three consecutive signal samples. Measuring the frequency of the signal using the method of the smallest middle squares. Harmonic analysis. Furie's order and Fourier transform. Discrete Fourier Transformation. Fast Fourier transform, realization of FFT algorithm in LabVIEW program. Measurement of active, reactive and apparent power. Power Measurement according to IEEE Standard 1459-2010. Measurement of power by adaptive harmonic filtering.