The correct functioning of data measuring systems is impossible without timely metrological examination and calibration of measuring channels. Uncalibrated channels can transmit unreliable data, leading to the poor monitoring and incorrect decision making. The overview of the current research in the field of measuring channels calibration shows the low research activity in this area and highlights its urgency. The work is performed in accordance with the general scientific cognition method, i.e. the detailed specification in combination with the companion analysis. The result of this research is developing the calibration algorithm, which allows obtaining protocols on the uncertainty of transmitted data by measuring channels reducing time and involved personnel excepting the direct connection to the system under study. The practical value of the developed calibration algorithm is eliminating manual data input by soft combining of an automated duty engineer's workplace and a computer via an installed video camera, recording calibration data. This results in immediate ready calibration protocols delivery and the calibration is performed by an expert, receiving the results instantly. Subjective and additive uncertainties of metrological personnel are excluded. The results of this study can be applied and are used in basic metrological services of power companies.