Title :
Accurate AC measurement of the in-phase component of DC standard resistances
Author_Institution :
Nat. Inst. of Stand., Giza, Egypt
Abstract :
A guarded AC voltage comparator bridge has been devised for the precise measurement of the in-phase component of DC standard resistances over the frequency range 10 Hz-100 Hz. It is based on inductive voltage dividers with electronically increased input impedance. The AC behavior of the resistance standards maintaining the NIS Ohm, as well as the working standards of values 1 /spl Omega/ to 10 k/spl Omega/, were investigated using this bridge.
Keywords :
bridge circuits; bridge instruments; comparators (circuits); electric resistance measurement; measurement standards; voltage dividers; 1 ohm to 10 kohm; 10 to 100 Hz; AC measurement; DC standard resistances; NIS Ohm; electronically increased input impedance; frequency range; guarded AC voltage comparator bridge; in-phase component; inductive voltage dividers; resistance standards; working standards; AC generators; Bridge circuits; Electrical resistance measurement; Equations; Frequency measurement; Impedance; Measurement standards; Phase measurement; Resistors; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.547134
