The guideline gives instructions for how to proceed in the calibration of measuring means for electrical quantities, which are frequently used (Part 3 foll.). In Part 1, ist also deals with the bases common to all its parts. In the present Part 2, simplified methods for the determination of the measurement uncertainty in the calibration of measuring means for electrical quantities are described. Part 2 relates to the calculation of the measurement uncertainty in the calibration of a measuring means. For practical purposes, the procedures are represented in a simplified form. They are, however, in conformity with the publications given in the references.