-
Produtos + Serviços
-
Osciloscópios + Analisadores
- Oscilloscopes
- Spectrum Analyzers (Signal Analyzers)
- Network Analyzers
- Analisador Lógico
- Protocol Analyzers and Exercisers
- Testadores de taxa de erro de bit (BERT)
- Analisadores de Figura de Ruído e Fontes de Ruído
- High-Speed Digitizers and Multichannel Data Acquisition Solutions
- Analisadores de Potência AC
- Analisador de potência CC
- Materials Test Equipment
- Device Current Waveform Analyzers
- Analisadores de Parâmetros e Dispositivos, Traçadores de Curvas
-
Medidores
-
Geradores, Fontes + Potência
-
Software
-
Wireless
-
Instrumentos Modulares
-
Teste de rede
-
Segurança da Rede + Visibilidade
-
Produtos Adicionais
- Sistemas de teste em circuitos - 3070 ICT
- Sistemas e componentes de teste com aplicações específicas
- Soluções de Teste Paramétrico
- Soluções de Medição Fotônica & Lightwave
- Frequência, Tempo, Distância, Grandezas Físicas
- Combinadores de laser monolítico e ótica de precisão
- Dispositivos para ondas milimétricas e microondas
-
Serviços
- KeysightCare Service and Support
- KeysightAccess Service
- Serviços de calibração
- Repair Services
- Technology Refresh Services
- Test as a Service (TaaS)
- Test Asset Management and Optimization
- Network/Security Services
- Consulting Services
- Financial Services
- Serviços de Treinamento
- Infoline Support Portal
- Used Equipment
- Todos os Serviços
- Todos os produtos, softwares e serviços
-
-
Soluções
- Indústrias
- Histórias de sucesso
- Recursos
- Suporte
- Blog
Measurement Uncertainty Calculation
Resources for calculation of measurement uncertainty.
It may surprise you to learn that there isn't a formal standard for how general-purpose measuring instruments are specified, or how those specifications are determined. Furthermore, when “calibration to manufacturer's specifications” is requested, a common assumption is that all calibration laboratories use a common method to qualify their calibration capability. Except for ISO/IEC17025 accredited calibration, this is not the case.
“Measurement adequacy” has often been judged by a relatively simple TAR (test accuracy ratio) approach, considering only the principal accuracy specification of the test equipment rather than all of the contributors to the total uncertainty.
The “Guide”, or GUM as it has become known, is a 100+ page document which recommends a methodology for qualifying test accuracy (or more correctly, the potential test inaccuracy) and was published in 1993. Although comprehensive in its treatment of the subject, it doesn't enjoy universal acclaim. Statisticians say it is critically flawed. Practicing engineers view it as too complicated and lengthy. It is, nevertheless, the first methodology to achieve formal, international consensus after decades of debate.
GUM Guide to the Expression of Uncertainty in Measurement – ISO/IEC Guide 98-3:2008
Visit http://www.iso.org to purchase this publication.
Free Version of GUM Guide to the Expression of Uncertainty in Measurement – OIML G 1-100:2008
A free version of the GUM is available from the International Organization of Legal Metrology. Download it by visiting http://www.oiml.org and search explicitly for “Evaluation of measurement data ‑ Guide to the expression of uncertainty in measurement”.
Free Practical Guides On Measurement Uncertainty
Before and after release of the GUM several national guides have been produced which aim to provide practical advice for those equipment users who are more likely to be at technician level rather than scientists.
Want help or have questions?
- © Keysight Technologies 2000–2021
- Privacidade
- Termos
- Contate o Webmaster