| Zugriffsnummer | 14320 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | AC-DC current transfer step-up calibration and uncertainty calculation |
| Autor(in); Institution |
Klonz, Manfred; 2.32, Wechsel-Gleich-Transfer, PTB-Braunschweig
Laiz, Héctor; Instituto Nacional de Tecnología Industrial (INTI), San Martin, ARGENTINA
Spiegel, Thomas; 2.32, Wechsel-Gleich-Transfer, PTB-Braunschweig
Bittel, Peter; 2.32, Wechsel-Gleich-Transfer, PTB-Braunschweig
|
| Quelle/Jahr | Rediscovering measurement in the age of informatics : IMTC 2001 ; proceedings of the 18th IEEE Instrumentation and Measurement Technology Conference: 3 (2001), 1435 - 1440 |
| Herausgeber(in) |
IEEE
|
| ISSN | 1091-5281 |
| ISBN | 0-7803-6646-8 |
| Verlag | Piscataway, NJ: IEEE Service Center |
| Konferenzangaben | 18th IEEE Instrumentation and Measurement Technology Conference: Rediscovering Measurement in the Age of Informatics, Budapest, 21-23, May, 2001, Hungary |
| Freie Schlagworte | ac-dc current transfer standard ; PTB-Multijunction Thermal Converter ; step-down procedure ; step-up procedure ; coaxial current shunts |
| Zusammenfassung | New ac-dc current transfer standards are built for the current range from 0,3 mA to 20 A and the frequency range from 10 Hz to 100 kHz. A 3-dimensional PTB-Multijunction Thermal Converter (MJTC) with a heater resistance of 27 Ω is the basic standard for the ac-dc current transfer at currents from 20 mA to 50 mA. At lower currents, planar MJTCs (PMJTCs) with heater resistances from 90 Ω to 960 Ω are used in a step-down procedure. Coaxial current shunts in parallel with PMJTCs extend the current range up to 20 A. The standard measurement uncertainties are in the range from 0,2 μA/A at 25 mA and 1 kHz to 50 μA/A at 20 A and 100 kHz. The high sensitivity of the PMJTC allows bigger steps in the step-up calibration and some smaller steps between these steps. Calibration of all these steps leads to an overdetermined system to check for the validity of the assumptions made in the step-up procedure. This results in reduced uncertainties at the different current levels compared to the old method. |
Zitierung
Klonz, M., Laiz, H., Spiegel, T., & Bittel, P. (2001). AC-DC current transfer step-up calibration and uncertainty calculation. 18th IEEE Instrumentation and Measurement Technology Conference: Rediscovering Measurement in the Age of Informatics, Budapest, 21-23, May, 2001, Hungary.