Title :
An Automated Co-Axial Ac Resistance Bridge
Author_Institution :
Nat. Phys. Lab., Centre for Electromagn. & Time Metrol.
Abstract :
An automated co-axial ac bridge has been constructed, by substituting automated inductive voltage dividers (autoIVD´s) for manual dividers in a standard 4 terminal-pair bridge design. The bridge has been used to measure the ratio of two 100 Omega resistors. A Tinsley 100 Omega ac/dc resistor has been found to change value by 0.1 parts per million (ppm) from 500 Hz to 2500 Hz, with a type A uncertainty of 0.025 ppm
Keywords :
bridge instruments; electric resistance measurement; voltage dividers; 100 ohm; 500 to 2500 Hz; Tinsley ac/dc resistor; automated coaxial ac resistance bridge; automated inductive voltage dividers; Bridge circuits; Computer errors; Computer interfaces; Conductors; Detectors; Laboratories; Multiplexing; Phase detection; Resistors; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2004 Conference on
Conference_Location :
London
Print_ISBN :
0-7803-8494-6
Electronic_ISBN :
0-7803-8494-6
DOI :
10.1109/CPEM.2004.305395
