Development of an Automated Precision Direct Current Source for Generation of pA Currents Based on Capacitance Charging Method at CSIR-NPL

Ehtesham, Bushra; Bist, Poonam Sethi; John, Thomas

doi:10.1007/s12647-016-0186-0

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…The highprecision current measurement is of great significance to generate the stable magnetic field in the nuclear magnetic resonance gyroscope; Accurate DC current measurement can be used for the evaluation of pA level current generators to calibrate other instruments. [2] In addition, current sensors also have important applications in other industries, such as automotive power management, solar cell system, smart grid and other application industries that need non-contact accurate current measurement. [3] Current sensors have developed to different degrees at home and abroad, which can be roughly divided into direct measurement and indirect measurement, and there are many kinds of non-contact current sensors.…”

Section: Introductionmentioning

confidence: 99%

Current sensor based on diamond nitrogen-vacancy color center

et al. 2023

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High precision current measurement is very important for the calibration of various high-precision equipment and the measurement of other precision detection fields. A new current sensor based on diamond NV color center magnetic measurement method is proposed to realize the accurate measurement of current. This new current method can greatly improve the accuracy of current measurement. Experiments show that the linearity of the current sensor based on diamond NV color center can reach up to 33 ppm, which is superior to other current sensors and solves the problem of low linearity. When the range of input current is 5-40 A, the absolute error of calculated current is less than 51 µA, and the relative error is 2.42 × 10-6 at 40 A. Combined with the research content and results of the experiment, the application of the current sensor in the field of current precision measurement is prospected.

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Section: Introductionmentioning

confidence: 99%

Current sensor based on diamond nitrogen-vacancy color center

et al. 2023

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“…In order to develop this system, many approaches are possible. The Consultative Committee for Electricity and Magnetism (CCEM) of the International Bureau of Weights and Measures (BIPM) [4] shows three possible methods to achieve the realization of the ampere, a) Ohm's law method [3,5], b) the capacitor-charging method [6][7][8], and c) the single-electron transport method [9][10][11]. Another method, the active transresistance (ULCA), is accepted and, despite of not being mentioned by the BIPM in [4], its traceability is based on the quantum Hall effect and the Josephson effect.…”

Section: Introductionmentioning

confidence: 99%

A reference system to calibrate low-current meters in the range of picoamperes to microamperes

Pinto,

Ventura,

Landim

et al. 2023

J. Phys.: Conf. Ser.

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The calibration of low current meters in the range of picoamperes up to microamperes is important for the electronics industry, for the photometry area, and especially for the ionizing radiation area. In Brazil, traceability is limited to ten microamperes. In this paper, a reference system using Ohm’s law method is presented. It was possible to calibrate an electrometer between 2 picoamperes and 20 microamperes, with uncertainties between 0.70 % and 0.000060 %, respectively, as well as to validate the developed system and Ohm’s law method by comparing it with the method used to calibrate values above 10 microamperes, in an intralaboratory comparison.

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