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David C.,Center Technique des Industries Aerauliques et Thermiques | Melvad C.,Danish Technological Institute DTI | Bissig H.,Federal Institute of Metrology | Batista E.,IPQ Instituto Portugues da Qualidade
16th International Flow Measurement Conference 2013, FLOMEKO 2013 | Year: 2013

This paper presents the results obtained in a research inter-comparison organized in the framework of the development of traceable micro flow facilities for liquids within the EMRP project "HLT07 Metrology for Drug Delivery" [1]. The paper presents the protocol of the comparison and the first results revealing some discrepancies between the laboratories. Copyright© (2013) by the International Measurement Federation (IMEKO). Source

Heinonen M.,Center for Metrology and Accreditation | Anagnostou M.,Hellenic Institute of Metrology EIM | Bell S.,National Physical Laboratory United Kingdom | Stevens M.,National Physical Laboratory United Kingdom | And 25 more authors.
International Journal of Thermophysics | Year: 2012

In the field of humidity quantities, the first CIPM key comparison, CCT-K6 is at its end. The corresponding European regional key comparison, EUROMET.T-K6, was completed in early 2008, about 4 years after the starting initial measurements in the project. In total, 24 NMIs from different countries took part in the comparison. This number includes 22 EURAMET countries, and Russia and South Africa. The comparison covered the dew-point temperature range from -50 C to +20 C. It was carried out in three parallel loops, each with two chilled mirror hygrometers as transfer standards in each loop. The comparison scheme was designed to ensure high quality results with evenly spread workload for the participants. It is shown that the standard uncertainty due to the long-term instability was smaller than 0.008 C in all loops. The standard uncertainties due to links between the loops were found to be smaller than 0.025 C at -50 C and 0.010 C elsewhere. Conclusions on the equivalence of the dew-point temperature standards are drawn on the basis of calculated bilateral degrees of equivalence and deviations from the EURAMET comparison reference values (ERV). Taking into account 16 different primary dew-point realizations and 8 secondary realizations, the results demonstrate the equivalence of a large number of laboratories at an uncertainty level that is better than achieved in other multilateral comparisons so far in the humidity field. © 2011 Springer Science+Business Media, LLC. Source

Merlone A.,INRIM - Istituto Nazionale di Ricerca Metrologica | Lopardo G.,INRIM - Istituto Nazionale di Ricerca Metrologica | Antonsen I.,Justervesenet | Bell S.,National Physical Laboratory United Kingdom | And 23 more authors.
AIP Conference Proceedings | Year: 2013

Climate change and its consequences require immediate actions in order to safeguard the environment and economy in Europe and in the rest of world. Aiming to enhance data reliability and reduce uncertainties in climate observations, a joint research project called MeteoMet-Metrology for Meteorology started in October 2011 coordinated by the Italian Istituto Nazionale di Ricerca Metrologica (INRiM). The project is focused on the traceability of measurements involved in climate change: surface and upper air measurements of temperature, pressure, humidity, wind speed and direction, solar irradiance and reciprocal influences between measurands. This project will provide the first definition at the European level of validated climate parameters with associated uncertainty budgets and novel criteria for interpretation of historical data series. The big challenge is the propagation of a metrological measurement perspective to meteorological observations. When such an approach will be adopted the requirement of reliable data and robust datasets over wide scales and long terms could be better met. © 2013 AIP Publishing LLC. Source

Bissig H.,Federal Institute of Metrology | Petter H.T.,VSL BV Dutch Metrology Institute | Lucas P.,VSL BV Dutch Metrology Institute | Batista E.,Portuguese Institute for Quality | And 10 more authors.
Biomedizinische Technik | Year: 2015

Microflow and nanoflow rate calibrations are important in several applications such as liquid chromatography, (scaled-down) process technology, and special health-care applications. However, traceability in the microflow and nanoflow range does not go below 16 μl/min in Europe. Furthermore, the European metrology organization EURAMET did not yet validate this traceability by means of an intercomparison between different National Metrology Institutes (NMIs). The NMIs METAS, Centre Technique des Industries Aérauliques et Thermiques, IPQ, Danish Technological Institute, and VSL have therefore developed and validated primary standards to cover the flow rate range from 0.1 μl/min to at least 1 ml/min. In this article, we describe the different designs and methods of the primary standards of the gravimetric principle and the results obtained at the intercomparison for the upper flow rate range for the various NMIs and Bronkhorst High-Tech, the manufacturer of the transfer standards used. © 2015 by De Gruyter. Source

Bell S.,National Physical Laboratory United Kingdom | Boese N.,Physikalisch - Technische Bundesanstalt | Bosma R.,Van Swinden Laboratorium VSL | Buzoianu M.,National Institute of Metrology BRML INM | And 7 more authors.
International Journal of Thermophysics | Year: 2015

Measurement of moisture in materials presents many challenges, due to diverse measuring principles, sample interactions with atmosphere, and variation in what is measured (either water content alone or moisture including other liquids). Calibrations are variously referenced to published standard methods, primary calibration facilities, or certified reference materials, but each of these addresses limited substances and ranges of measurement. Overall, metrology infrastructure is not as fully developed or coherent for this field as it is for many other areas of measurement. In order to understand the metrology needs and to support developments, several European national metrology institutes (NMIs) have undertaken some collaborative activities. These have included a “cooperation in research” project for sharing of information, a survey of moisture capabilities at NMIs, the formulation of a strategy for moisture metrology at the NMI level, and a funded research project to develop improved metrology for the moisture field. This paper summarizes the information gathered, giving an overview of the status of moisture metrology at NMIs, and it reports a proposed strategy to improve the current situation. © 2015, Crown Copyright. Source

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