Notes for Completion of the Form Overleaf

EUROMET PROJECT FINAL REPORT

1. Ref. No.: 641 2. Subject Field: Electricity (HF)

3 Type of collaboration: Comparison

4A. Partners: NPL, PTB 4B. CEC funded? No

5. Participating countries: UK, Germany

6. Title: Electrical pulse (risetime) intercomparison

7. Progress:

Measurements in this comparison were completed in 2004 and the final report was submitted to the chair of the Euromet RF Working Group for formal approval on 9th November 2006. This was a bilateral comparison between PTB and NPL. Good agreement was achieved between the two laboratories in the measurements. Both laboratories quoted similar uncertainties and there were no discrepant results. A paper on the comparison was presented at CPEM 2006 and a joint paper has since been published in IEEE Transactions. I&M-56, No2, April 2007, pp 266 - 270.

This comparison originated in a EUROMET experts meeting on fast pulses (project No. 544), and it was initially discussed and proposed at a EUROMET HF Experts Meeting (Paris, Nov 2001) where it was agreed that “fast pulses” lies within the remit of the HF Experts Group. A number of other EUROMET labs also expressed an interest in a fast pulse comparison at the meeting: SIQ, SP, NMi/VSL, TUBITAK-UME, BNM- LNE, CSIR-NML and CMA. However, in Europe, NPL and PTB have the most accurate facilities and it was decided that this bilateral should take place first – followed by a second rise-time comparison for the other Euromet laboratories in which both NPL and PTB should take part.

It is intended that this second rise-time comparison will be discussed at the Euro(a)met RF sub-field meeting in Delft on 26th April 2007. NPL will be able to co-ordinate the initial stages of this comparison – e.g. to canvas participants, etc - but NPL will not be able to act as pilot laboratory for it.

8. Coordinator´s name: Andrew Smith

Address: National Physical Laboratory, Hampton Rd, Teddington, Middlesex, UK, TW11 0LW.

Telephone: +44 20 8943 6672 Telefax: +44 20 8943 6098 E-mail: [email protected] 9. Completion date: 10. Coordinator´s signature: 11. Date: 9th November 2006 Andrew Smith 24 April 2007

Notes for completion of the form overleaf *) Delete as appropriate