Industrial Automatic Control Systems and Controllers Annotation << Back Territory of clashes: metrological requirements to energy monitoring and accounting systems Gurtovtsev A.L. In recent years, the FSU space saw significant difference of power engineers’ and metrologists’ opinions on the understanding of the metrological background of modern digital energy monitoring and accounting systems. The key question is whether such system is measuring tool or not. The paper analyzes the causes of this dispute. By comparing the concept of direct and indirect measurement, it shows the inapplicability of “indirect measurement” concept to digital measurements processing operation in energy monitoring and accounting systems and their parts.Keywords: metrology, direct measurement, indirect measurement, digital energy monitoring and accounting system. E-mail:beltei@rambler.ru