CALIBRATION OF A 10 1 RATIO TRANSFORMER USING THOMPSONS METHOD/

The results are reported from the calibration, using Thompson's method , of a 10:1 ratio transformer which will be used for setting up scales of capacitance at the Electrotechnical Laboratory, Tsukuba. The devia tion of the ratio from the nominal value of 10:1 was measured as -1, 3 7 x 10(-7) for the in-phase component and -7, 22 x 10(-7) for the quad rature component, with the transformer operated at a frequency of 1592 Hz with an rms applied voltage of 100 V. The uncertainties of the mea surement were estimated to be 5 x 10(-9) for the in-phase component an d 1,2 x 10(-8) for the quadrature component.