RF Impedance Standards and Traceability for Four-Terminal Pair and Related Measurements at frequencies form 1MHz to above 30 MHz

There has been no progress on any practical work here as no laboratory currently has significant funding for this activity at frequencies above 10 MHz, which was its original focus. However, in line with the decision of the HF Experts Group meeting in 2000, it was agreed at the HF Experts Meeting in November 2001 that this remains an important area for collaboration in Europe and that this project should be retained to help to co-ordinate the raising of funds and intercomparison activities.

An unsuccessful attempt was made in 2001 to obtain funds from the EC by submitting an ‘Expression of Interest’ (EoI) to the EC Framework V Growth Programme. Despite being given a ‘High’ priority by the EC assessors, it was not retained by the EC as a project.

Work on extending four terminal pair (4-TP) calibrations up to 10 MHz continues at NPL. In the USA, at NIST, there is already a capability for 4-TP up to 10 MHz. As other Euromet laboratories have a 4-TP capability at frequencies up to 1 MHz, the co-ordinator is investigating the possibility and advisability of an intercomparison in the 1 – 10 MHz range as an interim measure.

Further Information

Progress report submitted in March 2004.

Electricity and Magnetism (EM)
Bob Clarke (NPL)
Coordinating Institute
NPL (United Kingdom)
Further Partners