9762 papers found
A procedure for optimal selection of sample input signals to get the best calibration characteristics of measuring apparatus is proposed. As an example the problem of optimal selection of standard pressure setters when calibrating differential pressure measurer is solved.
In recent times, the Ionizing Radiation Metrology Laboratory implemented the ISO/IEC 17025 requirements for the radioactive source production and calibration services. To this a peer-review process was done in the main measurement systems of the laboratory. This work describes with details the structure of quality system adopted as well as the action plan and non-conformities.
The present work presents a prospective analysis of the implementation of Norm ISO17025 and PNQ criteria in the Laboratory of Calibration of the CRCN. The adopted methodology was described by Griffth. The results showed an average increasing of the 70.25 in all evaluated parameters, demonstrating the importance of the implementation of the quality norms and accreditation.
The paper reports on a series of workshops on Metrology, Accreditation and Standardization for the Automotive Industry (MASAI) that has been carried out in México in 2004 and 2005. The workshops analyze those aspects common to the quality triangle (MAS) that are relevant for the automotive industry in its very specific standards and practices (ISO/TS 16949, MSA, PPAP, APQP, etc.), and then focus on the metrology needs derived from them to propose possible solutions and best practices. In 2004 the workshop addressed the basics of this field and was carried out in 2 main Mexican locations,...
The acoustic pressure field mapping system of Ultrasound Laboratory (Labus) of Institute of Metrology, Standardization, and Industrial Quality (Inmetro) is being implemented, based on Standard IEC-61102. This system will be capable to estimate ultrasound pressure field parameters from biomedical transducers, essential step to calibration and certification of ultrasound equipments. The data acquisition is carried out on a water bath, where a positioning system moves a hydrophe, which produces electrical signals in response to waterborne acoustic signals, over the transducer acoustic field....
A methodology which defines the frequency of calibration of measuring instruments that control key processes in the pharmaceutical industry is described. In accordance with international standards and best laboratory practices (ISO/IEC 17025), the methodology incorporates the experience of renowned laboratories of the Brazilian pharmaceutical industry. These laboratories accepted to participate in a survey to analyze the current practices and procedures regarding the choice of the periodicity of calibration. Given the uncertainty associated with the master standard as stated in the...
In Brazil, beta radiation metrology was based on a 30-years-old irradiation system. Aiming to fulfill a regional metrological gap and safety requirements, a new secondary standard for beta radiation – the BSS2- was installed at the CDTN/CNEN. Results of three metrological characteristics of the BSS2 are presented.
The traditional modus operandi of the National Metrology Institutes has been the development, realisation and dissemination of the SI Units. However sustainable development poses challenges for our economies and societies that do not neatly align themselves with the SI Unit divisions of mass, length, time etc. Whilst the need for the NMIs to support the core mission is not questioned, this paper examines the case for top-level metrology to play a far more proactive role in rising to the grand challenges of the future.
Objectifying to present the legal metrology Brazilian model, this article will concept its aspects, showing the characteristics, procedures and the main lines. In this context, the National Institute of Metrology, Standardization and Industrial Quality (Inmetro - Instituto Nacional de Metrology, Standardization e Qualidade Industrial – Instituto Nacional de Metrologia, Normalização e qualidade Industrial), considering its mission, the effective and efficient warranty of the activities in the whole country (Brazil has continental dimensions), the structure aimed for the legal metrology work...
EUROMET is the regional collaboration of National Metrology Institutes (NMIs) in Europe. Since the signature of the CIPM Mutual Recognition Arrangement in 1999 EUROMET has concentrated on the evaluation of CMCs and NMI quality systems. Meanwhile, the iMERA project is exploring the many issues associated with a coordinated metrology research programme. Plans for a research network will be well advanced by the time of the IMEKO Congress.