Title :
Square-wave-source gated-detector bridge system for the precise measurement of resistance
Author_Institution :
Commonwealth Scientific and Industrial Research Organisation (CSIRO), National Standards Laboratory, Division of Applied Physics, Sydney, Australia
fDate :
1/1/1972 12:00:00 AM
Abstract :
The design and performance of a square-wave system for the precise measurement of resistance are described. A 25 Hz square wave is applied to a conventional resistance bridge, and the output of the bridge is sampled, after the decay of transients owing to reactances, by a gated detector. A single adjustment is sufficient to balance the bridge, and the balance is independent of thermal electromotive forces. The system is suitable for platinum-resistance thermometry, and a square-wave-to-d.c. error of less than 10 ¿¿ may be obtained in the resistance range 0¿100 ¿.
Keywords :
bridge instruments; electric variables measurement; ohmmeters; resistance measurement; square-wave generators; 0 to 100 ohms; 25 Hz square wave; Pt resistance thermometry; bridge circuits; gated detector bridge system; resistance measurement; square wave generators; transients due to reactances;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1972.0019
