Title :
Is linear regression good enough for determining bridge balance in precision high resistance measurements?
Author :
Chen, T.P. ; Sim, T.Y. ; Chua, S.W. ; Liu, L.X.
Author_Institution :
Nat. Measure. Centre, Productivity & Standards Board, Singapore
Abstract :
The goodness of linear regression for determining the balance point of a bridge used in precision high resistance measurements is studied, and it is found that the technique may produce a large error. It is shown that, well-correlated data does not guarantee an accurate balance point to be obtained, and the accuracy depends on the sum of squared deviations of datapoints from their mean.
Keywords :
bridge instruments; data analysis; electric resistance measurement; measurement errors; measurement uncertainty; statistical analysis; bridge balance; correlated data; error; linear regression; precision high resistance measurements; Bridge circuits; Detectors; Electrical resistance measurement; Linear regression; Productivity; Snow; Standards Board; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.850995
