Abstract
The article presents the study of electronic and optical-mechanical levels. It describes the vertical comparator and the method of its use in the study of levels. In addition, a variant of the universal comparator which improves stationary capabilities is proposed. In the study of levels the errors in measuring exceedances at specified working distances are determined, including a description of the procedure for determining errors of undercompensation of the level slope and the total error of the course correctness of the telescope focusing lens and the errors of applying divisions of the range poles for optical levels, and scales with Rab-code divisions for electronic ones. The article is written as part of the implementation of the NRNU MEPhI Competitiveness Enhancement Program.
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