Frequency Dependence Evaluation of CENAM Calculable Resistors

Estrada, A. H. Pacheco; Overney, F.

doi:10.1109/cpem.2018.8500922

Cited by 1 publication

(5 citation statements)

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“…During 2017, the bifilar and one of the octofilar CRs were sent to METAS, which is the National Metrology Institute (NMI) of Switzerland [24]. To not damage the integrity of the wires and their connections to their terminals, before sending the CRs to Switzerland, their wire strains were wholly removed moving the PTFE support, one centimeter down.…”

Section: Bifilar and Octofilar Frequency Evaluationmentioning

confidence: 99%

“…The results indicate that any of those geometries achieve the expected frequency behavior [23]. Nevertheless, their frequency dependence needs to be assessed to ensure no flaws during their construction [24].…”

Section: Introductionmentioning

confidence: 98%

“…A set of 1:1 and 10:1 ratio measurements was performed using as a reference a METAS 1 kΩ coaxial CR. Some of the results are presented in [24] and are explained here in detail, together with the measurement uncertainty analysis and the complete description of the construction methodology of the CR.…”

Section: Introductionmentioning

confidence: 99%

“…Graph of the relative difference between the measured and the calculated frequency dependence of the equivalent parallel resistance of the RC 10K-D5e and the HADDAD1000-1201 10:1 ratio, as a function of frequency[24]. Standard uncertainty components (k = 1) of the 10:1 ratio measurement between the RC-10K-D5e and the HADDAD1000-1201.…”

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confidence: 99%

“…Graph of the relative difference between the measured and the calculated frequency dependence of the equivalent parallel resistance of CR-1k-D, as a function of frequency. Curve 1 using the CR-10k-D5e as reference (ratio 10:1, black points), Curve 2 using the Haddad1000 1201 as reference (ratio 1:1, red points)[24].…”

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confidence: 99%

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A Simple Methodology to Develop Bifilar, Quadrifilar, and Octofilar Calculable Resistors

Estrada

Hernandez-Marquez²,

Aviles³

et al. 2020

Applied Sciences

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This paper describes the development of bifilar, quadrifilar, and octofilar Calculable Resistors (CRs). The research involves Evanohm-S and Isaohm wire heat treatment processes to achieve temperature coefficients less than 0.5 µΩ/Ω/ • C in the CR's wire resistance element, tests of different terminal-wire joining techniques, and construction aspects achieving a stability of less than 0.05 µΩ/Ω/day. This kind of construction methodology has not been presented in detail in previous CR papers, and it is essential to accomplish the correct parameters of a CR. Without it, the development of a CR can take several months or even years. A comparison between CRs developed in this research and a CR from the Federal Institute of Metrology (METAS) in Switzerland was carried out. Measurement results between the 10 kΩ octofilar CR and the METAS 1 kΩ coaxial CR show an agreement better than 0.35 µΩ/Ω through the audio-frequency range. Therefore, the octofilar CR can be used as an AC resistance reference with traceability to the quantum Hall resistance in DC.

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Section: Bifilar and Octofilar Frequency Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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