A New Method for the Calibration of the mV Ranges of an AC Measurement Standard

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A New Method for the Calibration of the mV Ranges of an AC Measurement Standard (379.31 KB)

Presented are different methods for the calibration of an AC Measurement Standard from 20 mV to 2 mV, 10 Hz to 1 MHz. The two methods currently used for this calibration are the comparison to an AC/DC Transfer Standard and the use of the bootstrap method given in the manufacturer’s service manual. A new method has been developed using the AC/DC Transfer Standard with a resistive voltage divider in a way that gives better Test Uncertainty Ratios (TURs) then the current methods. This paper describes these methods, sources of error and ways of reducing these errors. Also shown are test results comparing the methods [1].