It is presented and practically implemented in the paper an additional function for the measurement and acquisition system. This function allows the precise measurement of the power using the CompactDAQ platform and LabVIEW development environment. It is presented in the paper the work methods for every module, which was used for implementation of this function, their mutual synchronization, detailed analysis and measurement, as well as software calculations of power, and compensation of the transport delay which is a consequence of the imperfection of signal conditioners. Also, it is presented the short description of measurement channels and instrumentation.