Eduarda Filipe - Academia.edu (original) (raw)
Papers by Eduarda Filipe
− The Accredited Laboratories at their Certificate have described its best measurement capabiliti... more − The Accredited Laboratories at their Certificate have described its best measurement capabilities (BMCs) for the more or less routine calibrations. This BMCs were usually evaluated by interlaboratory comparisons (ILCs), the proficiency testing (PT) schemes as described by the ISO Guide 43. The NMIs traditionally organize the ILCs for the NABs providing the travelling standards, the reference(s) value(s) and at the end perform the statistical analysis of the laboratory results. The goal of this article is to discuss the existing approaches for ILCs evaluation in the calibration laboratories and propose a basis for the validation of the laboratories’ BMCs.
This document summarises the uncertainties in the realisation of the standard platinum resistance... more This document summarises the uncertainties in the realisation of the standard platinum resistance thermometer (SPRT) subranges of ITS-90 between the triple point of neon (24.5561 K) and the freezing point of silver (961.78 ºC). The document provides users of ITS-90 with guidance for assessing the uncertainty in their SPRT calibrations and temperature measurements. A secondary purpose is to promote harmonisation of the assessment of calibration and measurement capabilities as defined under the CIPM’s arrangement for the mutual recognition of national measurement institutes (CIPM 1999). The document describes all known sources of uncertainty and influence variables, identifies key references in the literature that discuss, model or evaluate each effect, gives an indication of the typical magnitudes of the uncertainties, and gives propagation laws so that total uncertainty may be determined. Document CCT/08-19/rev issued by the Comité Consultatif de Thermométrie of the BIPM; pp 89.
High Temperatures-High Pressures
In the frame of the European Metrology Research Program (EMRP) a new joint research project focus... more In the frame of the European Metrology Research Program (EMRP) a new joint research project focused on the development of new advances techniques for providing improved traceability to the kelvin, to support its wider and simpler dissemination to the users, is being carried out. This project is a challenge in the field of fundamental thermometry that tries to solve some of the pressing weaknesses of the International Temperature Scale of 1990 (ITS-90) and helps establish a practical link between the thermodynamic temperature and the temperature defined by the ITS-90. The main objective is to offer solutions to the most pressing problems associated with high level practical temperature metrology, in the most widely used temperature range, from −218ºC up to 1000ºC. This paper presents a general description of the SIB10 NOTED technical program.
16th International Congress of Metrology, 2013
In the framework of the European Metrology Research Program, NOTED is a multi-institute project f... more In the framework of the European Metrology Research Program, NOTED is a multi-institute project focused on the development of new advanced techniques for providing improved traceability to the kelvin to support its wider and simpler dissemination to science, industry and, in general, every user of temperature measurements. The main objectives of the project are to develop simpler and cheaper primary thermometers, new robust high performance sensors, optimisation of calibration procedures and reduced uncertainties in temperature measurement. This paper gives an overview of the project and the different activities that are being developed. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2 0 , which. permits unrestricted use, distributi and reproduction in any medium, provided the original work is properly cited.
Metrologia, 2007
Comparisons of indium freezing point cells have been carried out by the EUROMET TC-THERM group as... more Comparisons of indium freezing point cells have been carried out by the EUROMET TC-THERM group as Projects Nos. 391 and 712. The main objective was to establish the agreement between the realizations of the indium freezing point within different participating laboratories, to identify and eliminate possible discrepancies. The equipment has been made available by BNM-INM. Justervesenet coordinated project no. 391, while project 712 was coordinated by BNM-INM. This paper is the final report of the results obtained, including the uncertainties in the comparisons and the degrees of equivalence between the laboratories.
International Journal of Thermophysics, 2011
International Journal of Thermophysics, 2007
NCSLI Measure, 2015
Abstract: The gravimetric method is normally used in the calibration of micropipettes, based on I... more Abstract: The gravimetric method is normally used in the calibration of micropipettes, based on ISO 8655 and ISO 4787. In order to verify the influence of specific experimental details of the normalized procedure described in ISO 8655-6 (and others not described in the standard) on the delivered volume of a micropipette, several experimental tests were performed by the Volume Laboratory (LVO) of The Portuguese Institute of Quality (IPQ). These tests include the angle variation of aspiration and delivery of liquid, the immersion depth of the tip, aspiration and delivery time, the type of tip and altitude. The results verified that the amount of liquid delivered from a micropipette depends on very specific conditions. Some of the more relevant conclusions of this experimental study were that the delivered volume can be lower than expected if the delivery angle is larger than 60° and also if the laboratory is working at high altitudes. Higher than expected volumes can be delivered if the micropipette is immersed too deeply (more than 3 mm) into the liquid and the aspiration time is too long (> 8 s).
Accredit Qual Assur, 2008
Series on Advances in Mathematics for Applied Sciences, 2009
− The Accredited Laboratories at their Certificate have described its best measurement cap abilit... more − The Accredited Laboratories at their Certificate have described its best measurement cap abilities (BMCs) for the more or less routine calibrations. This BMCs were usually evaluated by interlaboratory comparisons (ILCs), the proficiency testing (PT) sc hemes as described by the ISO Guide 43. The NMIs traditional ly organize the ILCs for the NABs providing the travel ling standards, the reference(s) value(s) and at the end p rform the statistical analysis of the laboratory results. The goal of this article is to discuss the existing approaches for ILCs evaluation in the calibration laboratories and prop ose a basis for the validation of the laboratories’ BMCs.
Journal of Physics: Conference Series, 2015
ABSTRACT The 2014 Joint IMEKO (International Measurement Confederation) TC1-TC7-TC13 Symposium wa... more ABSTRACT The 2014 Joint IMEKO (International Measurement Confederation) TC1-TC7-TC13 Symposium was organized by RELACRE - Portuguese Association of Accredited Laboratories and the Portuguese Society for Metrology, on 3-5 September 2014. The work of this symposium is reported in this volume.
Advanced Mathematical and Computational Tools in Metrology VI, 2004
Measurement, 2010
ABSTRACT The best measurement capabilities (BMCs) of laboratories are usually described at the Ac... more ABSTRACT The best measurement capabilities (BMCs) of laboratories are usually described at the Accreditation Certificates, for the calibrations they perform. The evaluation of these BMCs is carried out also by interlaboratory comparisons (ILCs), the proficiency testing schemes as described by the ISO Guide 43 and ISO 13528 standard. The National Metrology Institutes traditionally organize the ILCs for the National Accreditation Boards, providing the travelling standards, the reference(s) value(s) and the statistical analysis of the laboratories results. The goal of this article is to discuss the existing approaches for evaluation of ILCs and propose a basis for the validation of laboratories BMCs.
International Journal of Thermophysics, 2011
ABSTRACT One of the main goals of interlaboratory comparisons (ILCs) is the evaluation of the lab... more ABSTRACT One of the main goals of interlaboratory comparisons (ILCs) is the evaluation of the laboratories performance for the routine calibrations they perform for the clients. In the frame of Accreditation of Laboratories, the national accreditation boards (NABs) in collaboration with the national metrology institutes (NMIs) organize the ILCs needed to comply with the requirements of the international accreditation organizations. In order that an ILC is a reliable tool for a laboratory to validate its best measurement capability (BMC), it is needed that the NMI (reference laboratory) provides a better traveling standard—in terms of accuracy class or uncertainty—than the laboratories BMCs. Although this is the general situation, there are cases where the NABs ask the NMIs to evaluate the performance of the accredited laboratories when calibrating industrial measuring instruments. The aim of this article is to discuss the existing approaches for the evaluation of ILCs and propose a basis for the validation of the laboratories measurement capabilities. An example is drafted with the evaluation of the results of mercury-in-glass thermometers ILC with 12 participant laboratories.
Two linear fitting procedures are applied to internationally reference data in refractometry of s... more Two linear fitting procedures are applied to internationally reference data in refractometry of solutions. Least square linear regression is compared to linea r interpolation in the intervals of the two successiv e referenced data. The formulas and the validity of t he procedures are shortly presented. The results are comparable, but for faster results, the linear regr ession method is preferred to the interpolation by interva ls, albeit their bigger uncertainties values.
Biomedizinische Technik. Biomedical engineering, Jan 6, 2015
For critical drug delivery, it is important to have a constant and well-known infusion rate deliv... more For critical drug delivery, it is important to have a constant and well-known infusion rate delivered by the complete infusion set-up (pump, tubing, and accessories). Therefore, various drug delivery devices and accessories were tested in this article in terms of their infusion accuracy, start-up delay, response time, and dependency on the viscosity. These measurements were performed as part of the European funded research project MeDD. The obtained results show that the infusion accuracy of the devices is flow rate and accessory depended, especially for low flow rates. Viscosity does not have a significant impact on the flow rate accuracy.
− The Accredited Laboratories at their Certificate have described its best measurement capabiliti... more − The Accredited Laboratories at their Certificate have described its best measurement capabilities (BMCs) for the more or less routine calibrations. This BMCs were usually evaluated by interlaboratory comparisons (ILCs), the proficiency testing (PT) schemes as described by the ISO Guide 43. The NMIs traditionally organize the ILCs for the NABs providing the travelling standards, the reference(s) value(s) and at the end perform the statistical analysis of the laboratory results. The goal of this article is to discuss the existing approaches for ILCs evaluation in the calibration laboratories and propose a basis for the validation of the laboratories’ BMCs.
This document summarises the uncertainties in the realisation of the standard platinum resistance... more This document summarises the uncertainties in the realisation of the standard platinum resistance thermometer (SPRT) subranges of ITS-90 between the triple point of neon (24.5561 K) and the freezing point of silver (961.78 ºC). The document provides users of ITS-90 with guidance for assessing the uncertainty in their SPRT calibrations and temperature measurements. A secondary purpose is to promote harmonisation of the assessment of calibration and measurement capabilities as defined under the CIPM’s arrangement for the mutual recognition of national measurement institutes (CIPM 1999). The document describes all known sources of uncertainty and influence variables, identifies key references in the literature that discuss, model or evaluate each effect, gives an indication of the typical magnitudes of the uncertainties, and gives propagation laws so that total uncertainty may be determined. Document CCT/08-19/rev issued by the Comité Consultatif de Thermométrie of the BIPM; pp 89.
High Temperatures-High Pressures
In the frame of the European Metrology Research Program (EMRP) a new joint research project focus... more In the frame of the European Metrology Research Program (EMRP) a new joint research project focused on the development of new advances techniques for providing improved traceability to the kelvin, to support its wider and simpler dissemination to the users, is being carried out. This project is a challenge in the field of fundamental thermometry that tries to solve some of the pressing weaknesses of the International Temperature Scale of 1990 (ITS-90) and helps establish a practical link between the thermodynamic temperature and the temperature defined by the ITS-90. The main objective is to offer solutions to the most pressing problems associated with high level practical temperature metrology, in the most widely used temperature range, from −218ºC up to 1000ºC. This paper presents a general description of the SIB10 NOTED technical program.
16th International Congress of Metrology, 2013
In the framework of the European Metrology Research Program, NOTED is a multi-institute project f... more In the framework of the European Metrology Research Program, NOTED is a multi-institute project focused on the development of new advanced techniques for providing improved traceability to the kelvin to support its wider and simpler dissemination to science, industry and, in general, every user of temperature measurements. The main objectives of the project are to develop simpler and cheaper primary thermometers, new robust high performance sensors, optimisation of calibration procedures and reduced uncertainties in temperature measurement. This paper gives an overview of the project and the different activities that are being developed. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2 0 , which. permits unrestricted use, distributi and reproduction in any medium, provided the original work is properly cited.
Metrologia, 2007
Comparisons of indium freezing point cells have been carried out by the EUROMET TC-THERM group as... more Comparisons of indium freezing point cells have been carried out by the EUROMET TC-THERM group as Projects Nos. 391 and 712. The main objective was to establish the agreement between the realizations of the indium freezing point within different participating laboratories, to identify and eliminate possible discrepancies. The equipment has been made available by BNM-INM. Justervesenet coordinated project no. 391, while project 712 was coordinated by BNM-INM. This paper is the final report of the results obtained, including the uncertainties in the comparisons and the degrees of equivalence between the laboratories.
International Journal of Thermophysics, 2011
International Journal of Thermophysics, 2007
NCSLI Measure, 2015
Abstract: The gravimetric method is normally used in the calibration of micropipettes, based on I... more Abstract: The gravimetric method is normally used in the calibration of micropipettes, based on ISO 8655 and ISO 4787. In order to verify the influence of specific experimental details of the normalized procedure described in ISO 8655-6 (and others not described in the standard) on the delivered volume of a micropipette, several experimental tests were performed by the Volume Laboratory (LVO) of The Portuguese Institute of Quality (IPQ). These tests include the angle variation of aspiration and delivery of liquid, the immersion depth of the tip, aspiration and delivery time, the type of tip and altitude. The results verified that the amount of liquid delivered from a micropipette depends on very specific conditions. Some of the more relevant conclusions of this experimental study were that the delivered volume can be lower than expected if the delivery angle is larger than 60° and also if the laboratory is working at high altitudes. Higher than expected volumes can be delivered if the micropipette is immersed too deeply (more than 3 mm) into the liquid and the aspiration time is too long (> 8 s).
Accredit Qual Assur, 2008
Series on Advances in Mathematics for Applied Sciences, 2009
− The Accredited Laboratories at their Certificate have described its best measurement cap abilit... more − The Accredited Laboratories at their Certificate have described its best measurement cap abilities (BMCs) for the more or less routine calibrations. This BMCs were usually evaluated by interlaboratory comparisons (ILCs), the proficiency testing (PT) sc hemes as described by the ISO Guide 43. The NMIs traditional ly organize the ILCs for the NABs providing the travel ling standards, the reference(s) value(s) and at the end p rform the statistical analysis of the laboratory results. The goal of this article is to discuss the existing approaches for ILCs evaluation in the calibration laboratories and prop ose a basis for the validation of the laboratories’ BMCs.
Journal of Physics: Conference Series, 2015
ABSTRACT The 2014 Joint IMEKO (International Measurement Confederation) TC1-TC7-TC13 Symposium wa... more ABSTRACT The 2014 Joint IMEKO (International Measurement Confederation) TC1-TC7-TC13 Symposium was organized by RELACRE - Portuguese Association of Accredited Laboratories and the Portuguese Society for Metrology, on 3-5 September 2014. The work of this symposium is reported in this volume.
Advanced Mathematical and Computational Tools in Metrology VI, 2004
Measurement, 2010
ABSTRACT The best measurement capabilities (BMCs) of laboratories are usually described at the Ac... more ABSTRACT The best measurement capabilities (BMCs) of laboratories are usually described at the Accreditation Certificates, for the calibrations they perform. The evaluation of these BMCs is carried out also by interlaboratory comparisons (ILCs), the proficiency testing schemes as described by the ISO Guide 43 and ISO 13528 standard. The National Metrology Institutes traditionally organize the ILCs for the National Accreditation Boards, providing the travelling standards, the reference(s) value(s) and the statistical analysis of the laboratories results. The goal of this article is to discuss the existing approaches for evaluation of ILCs and propose a basis for the validation of laboratories BMCs.
International Journal of Thermophysics, 2011
ABSTRACT One of the main goals of interlaboratory comparisons (ILCs) is the evaluation of the lab... more ABSTRACT One of the main goals of interlaboratory comparisons (ILCs) is the evaluation of the laboratories performance for the routine calibrations they perform for the clients. In the frame of Accreditation of Laboratories, the national accreditation boards (NABs) in collaboration with the national metrology institutes (NMIs) organize the ILCs needed to comply with the requirements of the international accreditation organizations. In order that an ILC is a reliable tool for a laboratory to validate its best measurement capability (BMC), it is needed that the NMI (reference laboratory) provides a better traveling standard—in terms of accuracy class or uncertainty—than the laboratories BMCs. Although this is the general situation, there are cases where the NABs ask the NMIs to evaluate the performance of the accredited laboratories when calibrating industrial measuring instruments. The aim of this article is to discuss the existing approaches for the evaluation of ILCs and propose a basis for the validation of the laboratories measurement capabilities. An example is drafted with the evaluation of the results of mercury-in-glass thermometers ILC with 12 participant laboratories.
Two linear fitting procedures are applied to internationally reference data in refractometry of s... more Two linear fitting procedures are applied to internationally reference data in refractometry of solutions. Least square linear regression is compared to linea r interpolation in the intervals of the two successiv e referenced data. The formulas and the validity of t he procedures are shortly presented. The results are comparable, but for faster results, the linear regr ession method is preferred to the interpolation by interva ls, albeit their bigger uncertainties values.
Biomedizinische Technik. Biomedical engineering, Jan 6, 2015
For critical drug delivery, it is important to have a constant and well-known infusion rate deliv... more For critical drug delivery, it is important to have a constant and well-known infusion rate delivered by the complete infusion set-up (pump, tubing, and accessories). Therefore, various drug delivery devices and accessories were tested in this article in terms of their infusion accuracy, start-up delay, response time, and dependency on the viscosity. These measurements were performed as part of the European funded research project MeDD. The obtained results show that the infusion accuracy of the devices is flow rate and accessory depended, especially for low flow rates. Viscosity does not have a significant impact on the flow rate accuracy.