DocumentCode
2747144
Title
Active-arm resistance bridge with voltage null-detection for precision measurement of resistances above 1 MΩ
Author
Rietveld, Gert ; Van der Beek, Jan
Author_Institution
VSL, Delft, Netherlands
fYear
2012
fDate
1-6 July 2012
Firstpage
199
Lastpage
200
Abstract
A high-ohmic bridge for automated resistance measurements in the range between 1 MΩ and 100 GΩ is described. Whereas similar setups reported so far use current null-detection, the present bridge uses voltage null-detection leading to excellent results and uncertainties. For example, the measurement of the 1:100 ratio of a 100 MΩ Hamon device agrees within (0.5 ± 0.4) μΩ/Ω with the nominal value. The total measurement uncertainty at 1 GΩ equals 1.9 μΩ/Ω (k = 1), which has been confirmed in a recent international comparison.
Keywords
bridge instruments; electric resistance measurement; Hamon device; active arm resistance bridge; high ohmic bridge; precision resistance measurement; resistance 1 Mohm to 100 Gohm; voltage null detection; Bridge circuits; Current measurement; Electrical resistance measurement; Resistance; Resistors; Uncertainty; Voltage measurement; high-ohmic measurement; null-detector; resistance; resistance measurements; resistors; small currents; standard; transfer standard;
fLanguage
English
Publisher
ieee
Conference_Titel
Precision Electromagnetic Measurements (CPEM), 2012 Conference on
Conference_Location
Washington, DC
ISSN
0589-1485
Print_ISBN
978-1-4673-0439-9
Type
conf
DOI
10.1109/CPEM.2012.6250870
Filename
6250870
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