Comparison of PD Calibration Capabilities in Four National Metrology Institutes Down to 0.1 pC

Jari Hällström, Jussi Havunen, Allan E. Bergman, Alf-Peter Elg, Ahmet Merev, Serkan Dedeoglu, İsmail Karaman, Pascual Simón, Jorge Rovira, Tomás Garcia, Fernando Garnacho

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Modern commercial PD calibrators often have their lowest charge level as 0.1 pC. However, now National Metrology Institutes (NMIs) provide traceable calibration services for apparent charge starting from 0.5 pC upwards and the relative uncertainty at this level is typically 20 %.
The main problem with the widely used numerical calibration method proposed in the standard is its low signal to noise ratio, which limits the accuracy on low PD levels below 10 pC. In practice, the lower limit of meaningful calibration work using this method is c. 1 pC. Charge sensitive amplifiers have been recently introduced for low PD calibration in the participating NMIs, and significant improvement in low-level calibration uncertainty has been achieved using this method.
This paper describes the results of a comparison between four NMIs. The aim was both to confirm their existing claims for measurement uncertainty from 1 pC to 50 nC, and to provide support for their plans to improve calibration services the low PD levels down to 0.1 pC.
The comparison was performed by transporting a reference calibrator between the four participating NMIs. Each NMI calibrated the 18 fixed settings of the PD calibrator, ranging from 0.1 pC to 50 nC. Values for measured charge, rise time, time to steady state and step voltage duration, as defined in current version of IEC 60270, were compared.
Original languageEnglish
Title of host publication 21st International Symposium on High Voltage Engineering, ISH2019
Number of pages5
DOIs
Publication statusAccepted/In press - 2019
MoE publication typeA4 Article in a conference publication
Event21st International Symposium on High Voltage Engineering, ISH 2019 - Budapest, Hungary
Duration: 26 Aug 201930 Aug 2019

Conference

Conference21st International Symposium on High Voltage Engineering, ISH 2019
Abbreviated titleISH 2019
CountryHungary
CityBudapest
Period26/08/1930/08/19

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metrology
signal to noise ratios
amplifiers
electric potential

Cite this

Hällström, J., Havunen, J., Bergman, A. E., Elg, A-P., Merev, A., Dedeoglu, S., ... Garnacho, F. (Accepted/In press). Comparison of PD Calibration Capabilities in Four National Metrology Institutes Down to 0.1 pC. In 21st International Symposium on High Voltage Engineering, ISH2019 https://doi.org/10.5281/zenodo.3243449
Hällström, Jari ; Havunen, Jussi ; Bergman, Allan E. ; Elg, Alf-Peter ; Merev, Ahmet ; Dedeoglu, Serkan ; Karaman, İsmail ; Simón, Pascual ; Rovira, Jorge ; Garcia, Tomás ; Garnacho, Fernando. / Comparison of PD Calibration Capabilities in Four National Metrology Institutes Down to 0.1 pC. 21st International Symposium on High Voltage Engineering, ISH2019. 2019.
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title = "Comparison of PD Calibration Capabilities in Four National Metrology Institutes Down to 0.1 pC",
abstract = "Modern commercial PD calibrators often have their lowest charge level as 0.1 pC. However, now National Metrology Institutes (NMIs) provide traceable calibration services for apparent charge starting from 0.5 pC upwards and the relative uncertainty at this level is typically 20 {\%}.The main problem with the widely used numerical calibration method proposed in the standard is its low signal to noise ratio, which limits the accuracy on low PD levels below 10 pC. In practice, the lower limit of meaningful calibration work using this method is c. 1 pC. Charge sensitive amplifiers have been recently introduced for low PD calibration in the participating NMIs, and significant improvement in low-level calibration uncertainty has been achieved using this method.This paper describes the results of a comparison between four NMIs. The aim was both to confirm their existing claims for measurement uncertainty from 1 pC to 50 nC, and to provide support for their plans to improve calibration services the low PD levels down to 0.1 pC.The comparison was performed by transporting a reference calibrator between the four participating NMIs. Each NMI calibrated the 18 fixed settings of the PD calibrator, ranging from 0.1 pC to 50 nC. Values for measured charge, rise time, time to steady state and step voltage duration, as defined in current version of IEC 60270, were compared.",
author = "Jari H{\"a}llstr{\"o}m and Jussi Havunen and Bergman, {Allan E.} and Alf-Peter Elg and Ahmet Merev and Serkan Dedeoglu and İsmail Karaman and Pascual Sim{\'o}n and Jorge Rovira and Tom{\'a}s Garcia and Fernando Garnacho",
note = "not published in Springer's conference proceedings",
year = "2019",
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language = "English",
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Hällström, J, Havunen, J, Bergman, AE, Elg, A-P, Merev, A, Dedeoglu, S, Karaman, İ, Simón, P, Rovira, J, Garcia, T & Garnacho, F 2019, Comparison of PD Calibration Capabilities in Four National Metrology Institutes Down to 0.1 pC. in 21st International Symposium on High Voltage Engineering, ISH2019. 21st International Symposium on High Voltage Engineering, ISH 2019, Budapest, Hungary, 26/08/19. https://doi.org/10.5281/zenodo.3243449

Comparison of PD Calibration Capabilities in Four National Metrology Institutes Down to 0.1 pC. / Hällström, Jari; Havunen, Jussi; Bergman, Allan E.; Elg, Alf-Peter; Merev, Ahmet; Dedeoglu, Serkan; Karaman, İsmail; Simón, Pascual; Rovira, Jorge; Garcia, Tomás; Garnacho, Fernando.

21st International Symposium on High Voltage Engineering, ISH2019. 2019.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Comparison of PD Calibration Capabilities in Four National Metrology Institutes Down to 0.1 pC

AU - Hällström, Jari

AU - Havunen, Jussi

AU - Bergman, Allan E.

AU - Elg, Alf-Peter

AU - Merev, Ahmet

AU - Dedeoglu, Serkan

AU - Karaman, İsmail

AU - Simón, Pascual

AU - Rovira, Jorge

AU - Garcia, Tomás

AU - Garnacho, Fernando

N1 - not published in Springer's conference proceedings

PY - 2019

Y1 - 2019

N2 - Modern commercial PD calibrators often have their lowest charge level as 0.1 pC. However, now National Metrology Institutes (NMIs) provide traceable calibration services for apparent charge starting from 0.5 pC upwards and the relative uncertainty at this level is typically 20 %.The main problem with the widely used numerical calibration method proposed in the standard is its low signal to noise ratio, which limits the accuracy on low PD levels below 10 pC. In practice, the lower limit of meaningful calibration work using this method is c. 1 pC. Charge sensitive amplifiers have been recently introduced for low PD calibration in the participating NMIs, and significant improvement in low-level calibration uncertainty has been achieved using this method.This paper describes the results of a comparison between four NMIs. The aim was both to confirm their existing claims for measurement uncertainty from 1 pC to 50 nC, and to provide support for their plans to improve calibration services the low PD levels down to 0.1 pC.The comparison was performed by transporting a reference calibrator between the four participating NMIs. Each NMI calibrated the 18 fixed settings of the PD calibrator, ranging from 0.1 pC to 50 nC. Values for measured charge, rise time, time to steady state and step voltage duration, as defined in current version of IEC 60270, were compared.

AB - Modern commercial PD calibrators often have their lowest charge level as 0.1 pC. However, now National Metrology Institutes (NMIs) provide traceable calibration services for apparent charge starting from 0.5 pC upwards and the relative uncertainty at this level is typically 20 %.The main problem with the widely used numerical calibration method proposed in the standard is its low signal to noise ratio, which limits the accuracy on low PD levels below 10 pC. In practice, the lower limit of meaningful calibration work using this method is c. 1 pC. Charge sensitive amplifiers have been recently introduced for low PD calibration in the participating NMIs, and significant improvement in low-level calibration uncertainty has been achieved using this method.This paper describes the results of a comparison between four NMIs. The aim was both to confirm their existing claims for measurement uncertainty from 1 pC to 50 nC, and to provide support for their plans to improve calibration services the low PD levels down to 0.1 pC.The comparison was performed by transporting a reference calibrator between the four participating NMIs. Each NMI calibrated the 18 fixed settings of the PD calibrator, ranging from 0.1 pC to 50 nC. Values for measured charge, rise time, time to steady state and step voltage duration, as defined in current version of IEC 60270, were compared.

U2 - 10.5281/zenodo.3243449

DO - 10.5281/zenodo.3243449

M3 - Conference article in proceedings

BT - 21st International Symposium on High Voltage Engineering, ISH2019

ER -

Hällström J, Havunen J, Bergman AE, Elg A-P, Merev A, Dedeoglu S et al. Comparison of PD Calibration Capabilities in Four National Metrology Institutes Down to 0.1 pC. In 21st International Symposium on High Voltage Engineering, ISH2019. 2019 https://doi.org/10.5281/zenodo.3243449