Comments on "Accurate measurement of power, energy, and true RMS voltage using synchronous counting"

The authors comment on the principle of operation, on error calculation and on results presented by J.K. Kolanko in ibid., vol.42, p.752-4, (June 1993). They conclude that the paper has many errors and many details have been omitted which make it extremely difficult to understand. However, the paper documents a design which has probably been implemented successfully and is probably a useful device for its intended purposes.