A comparative analysis of AC/DC transfer standards for comparison of national standards

Velychko, Oleh; Isaiev, Valentyn

doi:10.15587/1729-4061.2018.150459

Cited by 5 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Subsequent substitution and replacement of the variables ΔE AC and ΔU AC , using (11) and (12), allow obtaining the functional relationship between the increases of the AC-DC transfer differences of the reference voltage converter and the device under test:…”

Section: Analysis Of Voltage Converter Effect On Measurement Results ...mentioning

confidence: 99%

See 1 more Smart Citation

Dual-Using an AC-DC Transfer Standard for Determining Current Difference of Precision Shunt

Isaiev¹

2022

Preprint

Self Cite

View full text Add to dashboard Cite

<p>The commercial AC-DC transfer standards are widespread at leading calibration and measurement laboratories for DC and low-frequency metrology. Therefore, possibilities of various combinations of applying such instruments, particularly to verify the results of calibrating the precision current shunts or for optimizing the available facility, are of interest. The peculiarities of dual-using the AC-DC transfer standard are outlined, investigated, and discussed. The analytical and computer modeling, as well as the technical and theoretical analyses, are presented. Deriving the set of equations for the description of current distribution in the measurement technique for determining the AC-DC current transfer difference of the tested shunt is one of the work achievements. The measurement results obtained following the presented approach were verified using two voltage converters (Fluke 792A and PMJ TC). Some points of measurement uncertainty evaluation also are illuminated in the paper </p>

show abstract

Section: Analysis Of Voltage Converter Effect On Measurement Results ...mentioning

confidence: 99%

“…(17) Substituting in (17) a minor increase in A C voltage, one can obtain an expression similar to (11). Δδ X =-ΔU ac /U dc .…”

Section: Analysis Of Voltage Converter Effect On Measurement Results ...mentioning

confidence: 99%

Dual-Using an AC-DC Transfer Standard for Determining Current Difference of Precision Shunt

Isaiev¹

2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The AC/DC transfer standards are the highprecision standards for the difference between the root mean square (RMS) voltage and the equivalent DC voltage. Those standards are widely used to link AC and DC voltages [4][5][6][7].…”

Section: Basis For Ac Voltage Measurementmentioning

confidence: 99%

Evaluation of Long-Term Stability of High-Precision Standard for Low-Frequency Voltage Measurement

Velychko,

Isaiev

2023

Proceedings of the 26th IMEKO TC4 International Symposium and 24th International Workshop on ADC/DAC Modelling and Testing

View full text Add to dashboard Cite

The National measuring standards ensure the quality of measurements in different areas of science and technology. The actual errors of standards are not the only necessary characteristics to be determined. The long-term stability of the corrections also should be evaluated to guarantee the uncertainty of measurement is within the specified margin and, as a consequence, the metrological traceability is established. This paper mainly concerns the stability evaluation of the top-level standard for metrology service in low-frequency voltage measurement. The AC-DC transfer difference of high-precision voltage converter has been determined for almost 20 years. The measurements performed gave an opportunity to compare the deviations detected with the relevant combined uncertainties. The long-term stability estimate was within 20 μV/V for the frequency of 1 MHz.

show abstract

“…RL sent the calibration object to the participating laboratory, and this laboratory returned this object back to RL. In this case, the RL constantly monitored the stability of the calibration object [35,37]. The RL determined the characteristics of the instability of the calibration object before and after its research in the CLs participating in the ILC.…”

Section: The National Interlaboratory Comparisons For Calibration Laboratoriesmentioning

confidence: 99%

The Data Evaluation of Interlaboratory Comparisons for Calibration Laboratories

Velychko¹,

Gordiyenko²

2022

Applied Aspects of Modern Metrology

Self Cite

View full text Add to dashboard Cite

National accreditation agencies in different countries have set quite strict requirements for accreditation of testing and calibration laboratories. Interlaboratory comparisons (ILCs) are a form of experimental verification of laboratory activities to determine technical competence in a particular activity. Successful results of conducting ILCs for the laboratory are a confirmation of competence in carrying out certain types of measurements by a specific specialist on specific equipment. To obtain reliable results of ILC accredited laboratories, it is necessary to improve the methods of processing these results. These methods are based on various data processing algorithms. Therefore, it is necessary to choose the most optimal method of processing the obtained data, which would allow to obtain reliable results. In addition, it is necessary to take into account the peculiarities of the calibration laboratories (CLs) when evaluating the results of ILС. Such features are related to the need to provide calibration of measuring instruments for testing laboratories. The evaluation results for ILCs for CLs are presented. The results for all participants of ILCs were evaluated using the En and z indexes. The obtained results showed that for the such ILCs it is also necessary to evaluate the data using the z index also.

show abstract

A comparative analysis of AC/DC transfer standards for comparison of national standards

Cited by 5 publications

References 20 publications

Dual-Using an AC-DC Transfer Standard for Determining Current Difference of Precision Shunt

Dual-Using an AC-DC Transfer Standard for Determining Current Difference of Precision Shunt

Evaluation of Long-Term Stability of High-Precision Standard for Low-Frequency Voltage Measurement

The Data Evaluation of Interlaboratory Comparisons for Calibration Laboratories

Contact Info

Product

Resources

About