Title :
Digital ´bridge´ for comparison of AC-DC transfer instruments
Author :
Knight, R.B.D. ; Legg, D.J. ; Martin, P.
Author_Institution :
NPL, Teddington, UK
fDate :
5/1/1991 12:00:00 AM
Abstract :
A system for automatic AC-DC transfer and transfer difference measurement is described. The combination of high resolution digitisers with curve-fitting methods of analysis yields measurement uncertainties as small as can be obtained by the most painstaking manual methods. A model relating the input and output of thermal convertors is used to evaluate the range over which a linear approximation may be used.
Keywords :
bridge instruments; computerised instrumentation; convertors; digital instrumentation; signal processing equipment; AC-DC transfer instruments; calibration; curve-fitting methods; high resolution digitisers; linear approximation; measurement uncertainties; thermal convertors; transfer difference measurement;
Journal_Title :
Science, Measurement and Technology, IEE Proceedings A
