Title :
A precision 10 mA current shunt is used to calibrate AC current at 1 mA and 100 /spl mu/A levels
Author_Institution :
Simco Electron., Santa Clara, CA, USA
Abstract :
The calibration of low AC current at 1 mA and 100 /spl mu/A is described using current divider techniques. Uncertainties are calculated for 9:1 and 99:1 current division ratios. A builddown method is used stepping from 10 mA to 1 mA and from 1 mA to 100 /spl mu/A using a NIST-calibrated 10 mA current shunt as the reference.
Keywords :
calibration; electric current measurement; 1 mA to 100 muA; 10 mA; 10 to 1 mA; AC current; NIST; calibration; current division ratio; precision current shunt; Analog-digital conversion; Calibration; Circuits; Consumer electronics; Current measurement; Frequency; Laboratories; NIST; Resistors; Switches;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.699744
