19 Sep 2019
| 19 Sep 2019
Results from the national intercomparison for rise time and bandwidth measurements within the German Calibration Service (Deutscher Kalibrierdienst – DKD)
Kai Baaske
CORRESPONDING AUTHOR
Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
Thomas Kleine-Ostmann
Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
Thorsten Schrader
Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
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Cited articles
Cox, M. G.: The evaluation of key comparison data, Metrologia, 39, 589–595, 2002.
DIN EN ISO/IEC 17043: Konformitätsbewertung – Allgemeine Anforderungen an
Eignungsprüfungen, Deutsche Institut für Normung e.V. (DIN), Berlin, 2010.
GUM: Evaluation of measurement data – Guide to the expression of uncertainty
in measurement, GUM 1995 (with minor correc-tions), JCGM 100, 2008.
VDI: VDI/VDE/DGQ/DKD 2622 Blatt 4: Kalibrieren von Messmitteln für elektrische
Größen – Oszilloskope, Verein Deutscher Ingenieure, Düsseldorf, May 2014.
Short summary
An intercomparison in the framework of the German Calibration Service (Deutscher Kalibrierdienst – DKD) was carried out. Two different travelling standards were used to measure the rise time of a pulse generator and the rise time, bandwidth and attenuation of an oscilloscope. Fourteen participants performed the measurements from September 2015 until May 2016. The overall results show that the measurements of the participating laboratories are in good agagreement with the reference values.
An intercomparison in the framework of the German Calibration Service (Deutscher Kalibrierdienst...
