Conclusions
A voltage and current calibrator with ranges from 1 to 600 V and from 10 mA to 10 A has been designed for testing class 0.5 instruments at audio frequencies. The calibrator efficiency is nearly equal to the efficiency of dc calibrators [4].
The calibrator accuracy can be increased if a reduction of the testing rate is acceptable. In such a case, preliminary correction of the thermal emf before each measurement make the calibrator nearly as accurate as calibrators based on the nonsimultaneous comparison principle [1].
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Literature cited
V. M. Kalyapin et al., Izmeritel'. Tekh., No.1 (1971).
M. T. Zheleznov and L. G. Shirshev, Wirewound Resistors [in Russian], Énergiya, Moscow (1970).
M. I. Levin, Principles of Electrical Measurements, Energiya, Moscow (1972).
M. V. Kalyapin et al., Izmeritel'. Tekh., No. 1 (1969).
Additional information
Translated from Izmeritel'naya Tekhnika, No. 8, pp. 73–75, August, 1975.
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Kalyapin, V.M. Class 0.1 ac current and voltage calibrators. Meas Tech 18, 1223–1226 (1975). https://doi.org/10.1007/BF00818466
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DOI: https://doi.org/10.1007/BF00818466