Key Comparison of AC-DC High Voltage Transfer Standard

Project Description

In order to link the National Metrology Institutes organised in EURAMET to the key comparison CCEM-K6a/K9, the EURAMET Technical Committee for Electricity and Magnetism decided to organise the corresponding RMO key comparison EURAMET.EM-K9 of AC-DC High Voltage Transfer Standard with support group of the National Metrology Institutes PTB, LNE and CMI.

PTB acts a pilot laboratory and provides a travelling standard, LNE is responsible for scheduling tasks. CMI and LNE are jointly responsible for evaluation of comparison results.
CMI is responsible for preparing the report of the comparison.

The technical protocol can be downloaded here>>

Progress Report 2026-09-22

The measurements are in progress but delayed about several months.

The first loop was cancelled due to problems with TS and rescheduled to be the last loop. Moreover, two more participants were not able to perform measurements during assigned slots due technical problems with their setups and asked to be rescheduled to the last loop.