Checking the limbs of theodolites and other angle-measuring instruments with standard multisided prisms

Conclusions The use of multisided prisms for checking limb division errors significantly improves the measurement accuracy (provided autocollimators with high reading accuracy are used) and the observer's work productivity.Another advantage of this method is the comparative measurement speed in a single series, which, in the final analysis, also provides an increase of accuracy.The proposed method does not require labor-consuming computations, and it fully provides the required accuracy.Translated from Izmeritel'naya Tekhnika, No. 3, pp. 65–71, March, 1968.