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An automated AC-DC transfer calibration system

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2 Author(s)
Filipski, P.S. ; Inst. for Nat. Meas. Stand., Nat. Res. Council of Canada, Ottawa, Ont., Canada ; Rinfret, R.L.

Improvements in the National Research Council of Canada (NRC)'s ac-dc transfer capabilities have been achieved through full automation of the ac-dc transfer comparator, extensive redesign of the control software, and modification of the voltage buildup procedure. Hardware additions to the comparator design include stepping motor-driven switches and a range changer of a commercial electronic transfer standard. Redesigned software can be easily modified to accept new instruments and new procedures. The NRC voltage buildup procedure has been modified at the 500- and 1000-V levels. The expanded uncertainty assigned to the NRC working standard is given, and its components are briefly discussed

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:49 ,  Issue: 2 )

Date of Publication:

Apr 2000

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