A 10 V Josephson Voltage Standard Comparison Between NIST and INMETRO as a Link to BIPM

Landim, Regis Pinheiro; Tang, Yang; Afonso, Edson; Ferreira, Vı́tor F.

doi:10.1109/tim.2010.2099370

Cited by 5 publications

(5 citation statements)

References 6 publications

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“…The binary step-up method was chosen to metrologically characterize a HVDC resistive divider, in order to achieve local traceability of the RVD to the SI volt through Inmetro's Josephson primary voltage standards [1]. This is the first step to provide Inmetro with an HVDC Reference System, whose traceability chain is totally independent of other NMIs.…”

Section: Discussionmentioning

confidence: 99%

“…The conversion from high voltage (HV) to low voltage (LV) is carried out by the RVD, and the ratio between such voltages (SF) is the main characteristic of a voltage divider [2;6]. The SF value can be obtained using equation (1).…”

Section: Binary Step-up Methodsmentioning

confidence: 99%

“…The High Voltage Metrology Laboratory (Lamat) of the National Institute of Metrology, Quality and Technology (Inmetro) is legally responsible in Brazil for providing and maintaining the traceability to the International System of Units (SI) volt at high voltage levels (HVDC, mostly between 100 kV and 800 kV). Lamat has an HVDC system composed of: (a) a standard resistive voltage divider (RVD), manufactured to operate in the range from 1 kV to 150 kV (at both positive and negative polarities), which is periodically calibrated by the National Measurement Institute (National Institute of Metrology of Australia) and; (b) an 8 ½ digital multimeter (DMM), which is periodically calibrated at Inmetro using its national low voltage standards (Zener-based DC voltage reference standard) which, by their turn, are calibrated four times a year using Inmetro's Josephson primary voltage standards [1]. The RVD has a module with a rated voltage of 150 kV, which has 150 resistors of 1.5 MΩ each, with a total resistance of 225 MΩ per module.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Uncertainty assessment of a resistive voltage divider for binary step-up method implementation in HVDC applications

Vitorio,

de Souza,

Landim

et al. 2023

J. Phys.: Conf. Ser.

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The most used methods for determining the ratio of High Voltage Direct Current (HVDC) standard resistive dividers are described in this paper. The binary step-up method was chosen to metrologically characterize a HVDC resistive divider, in order to achieve local traceability to the SI from Josephson Voltage Standards. A Monte Carlo-based simulation was performed to estimate the uncertainty levels of each step from 1.25 kV up to 10 kV, considering that the main components are the uncertainty of the digital multimeter and the voltage source. It was found a variation up to 64-fold in the standard deviation of the voltage output, for a uniform distribution, when the voltage source uncertainty was increased up to 10-fold.

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Section: Discussionmentioning

confidence: 99%

Section: Binary Step-up Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Uncertainty assessment of a resistive voltage divider for binary step-up method implementation in HVDC applications

Vitorio,

de Souza,

Landim

et al. 2023

J. Phys.: Conf. Ser.

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show abstract

“…The difference of the two waveforms is achieved by connecting the positive 'high' poles of the devices of the two PJVS systems together and connecting the negative 'low' poles to the digitizer. To eliminate the undesired offset voltage, which includes both the voltmeter offset and thermal electromotive forces (EMFs) in the measurement loop, with a fixed and a linear drift component [24,25], the data acquisition procedure follows a ' + −+ − +−' sequence, where ' + ' and ' − ' respectively represent both waveforms biased positively and negatively. The polarity change of the waveform is accomplished by adjusting the bias source [26].…”

Section: Measurement Methodsmentioning

confidence: 99%

Precision square waves synthesized by programmable Josephson voltage standards for induced voltage compensation in a Joule balance

Wang

Zhang

et al. 2015

Meas. Sci. Technol.

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A programmable Josephson voltage standard (PJVS) can be used to generate a precision square wave for induced voltage compensation to measure the mutual inductance between the coils in a joule balance. In this paper, the influence of the transitions between quantized voltages in the synthesized square waves is analyzed in detail. The ratio of the time-integrated value of the transitions to the total waveform is reduced to several parts in 104 to improve the measurement accuracy. The influence of different configurations of the integrating digitizer is discussed. The result shows that when the voltages are in a quantum state, the time-integrated agreement between the measured and theoretical differences for two PJVS systems is within 4 × 10−9 V s V−1 s−1. For the total time integration of a voltage waveform larger than 2 V s, the combined relative uncertainty is less than 5.9 × 10−8 V s V−1 s−1. The result confirms the capability of the PJVS to generate a precision square wave for the joule balance.

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“…This measurement shield was connected to the ground through the JVS ground (which is connected to the laboratory individual ground network outside the building, through one single wire). More details regarding INMETRO CJVS and PJVS systems can be seen in [10] and [11], respectively.…”

Section: Measurement Conditionsmentioning

confidence: 99%

Bilateral comparison of dc voltage at 10 V between UTE and INMETRO

Slomovitz,

Landim,

de Souza

et al. 2023

J. Phys.: Conf. Ser.

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A bilateral comparison between the Instituto Nacional de Metrologia, Qualidade e Tecnología (INMETRO) and the Administración Nacional de Usinas y Trasmisiones Eléctricas (UTE) was performed during 2019 and 2020. The National Laboratory Standards used were two Josephson Voltage Standards at INMETRO (a CJVS and a PJVS), and a bank of multiple Zeners at UTE, both at 10 V level. The traveling standards were two commercial Zener based sources. The INMETRO was the pilot laboratory and the comparison error was (-1.79 ± 2.55) parts in 107, k=2.

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A 10 V Josephson Voltage Standard Comparison Between NIST and INMETRO as a Link to BIPM

Cited by 5 publications

References 6 publications

Uncertainty assessment of a resistive voltage divider for binary step-up method implementation in HVDC applications

Uncertainty assessment of a resistive voltage divider for binary step-up method implementation in HVDC applications

Precision square waves synthesized by programmable Josephson voltage standards for induced voltage compensation in a Joule balance

Bilateral comparison of dc voltage at 10 V between UTE and INMETRO

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