Title :
The standard device for AC weak magnetic field at NIM
Author_Institution :
Nat. Inst. of Metrol., Beijing, China
Abstract :
The standard of alternating weak magnetic field with frequency from 10Hz to 10kHz and magnetic flux density(RMS) from 100nT to 1mT is established. The relative uncertainty of the magnetic flux density is: 2×10-4-1×10-3(k=2). This article describes the theory, the composition and characteristics of the device. The traceability method and the analysis to uncertainty of the standard device are also provided.
Keywords :
calibration; coils; magnetic field measurement; magnetometers; measurement uncertainty; AC magnetometer calibration; AC weak magnetic field; NIM; RMS; frequency 10 Hz to 10 kHz; induction coil turn area calibration; magnetic flux density; standard device uncertainty; traceability method; Coils; Frequency measurement; Frequency response; Magnetic field measurement; Magnetic fields; Magnetometers; Standards; Alternating weak magnetic field; Coil constant; Combined field coil; Frequency response of coil constant; Magnetic field traceability;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2012 Conference on
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4673-0439-9
DOI :
10.1109/CPEM.2012.6250930
