UNI ISO/TS 21749 : 2009
Current
The latest, up-to-date edition.
MEASUREMENT UNCERTAINTY FOR METROLOGICAL APPLICATIONS - REPEATED MEASUREMENTS AND NESTED EXPERIMENTS
26-03-2009
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Statistical methods of uncertainty evaluation
4.1 Approach of the Guide to the expression
of uncertainty of measurement
4.2 Check standards
4.3 Steps in uncertainty evaluation
4.4 Examples in this Technical Specification
5 Type A evaluation of uncertainty
5.1 General
5.2 Role of time in Type A evaluation of uncertainty
5.3 Measurement configuration
5.4 Material inhomogeneity
5.5 Bias due to measurement configurations
6 Type B evaluation of uncertainty
7 Propagation of uncertainty
7.1 General
7.2 Formulae for functions of a single variable
7.3 Formulae for functions of two variables
8 Example - Type A evaluation of uncertainty from
a gauge study
8.1 Purpose and background
8.2 Data collection and check standards
8.3 Analysis of repeatability, day-to-day and
long-term effects
8.4 Probe bias
8.5 Wiring bias
8.6 Uncertainty calculation
Annex A (normative) - Symbols
Bibliography
This Technical Specification follows the approach taken in the Guide to the expression of the uncertainty of measurement (GUM) and establishes the basic structure for stating and combining components of uncertainty.
| Committee |
CT 16
|
| DocumentType |
Technical Specification
|
| PublisherName |
Ente Nazionale Italiano di Unificazione (UNI)
|
| Status |
Current
|
| Standards | Relationship |
| ISO/TS 21749:2005 | Identical |
| ISO 5725-1:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions |
| ISO/IEC Guide 98:1993 | Guide to the expression of uncertainty in measurement (GUM) |
| ISO 5725-3:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 3: Intermediate measures of the precision of a standard measurement method |
| ISO 5725-6:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in practice of accuracy values |
| ISO Guide 35:2017 | Reference materials — Guidance for characterization and assessment of homogeneity and stability |
| ISO 5725-4:1994 | Accuracy (trueness and precision) of measurement methods and results Part 4: Basic methods for the determination of the trueness of a standard measurement method |
| ISO/IEC Guide 99:2007 | International vocabulary of metrology Basic and general concepts and associated terms (VIM) |
| ISO/TS 21748:2004 | Guidance for the use of repeatability, reproducibility and trueness estimates in measurement uncertainty estimation |
| ISO 5725-2:1994 | Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method |
| ISO 3534-3:2013 | Statistics — Vocabulary and symbols — Part 3: Design of experiments |
| ISO 5725-5:1998 | Accuracy (trueness and precision) of measurement methods and results — Part 5: Alternative methods for the determination of the precision of a standard measurement method |
| ISO 3534-1:2006 | Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in probability |
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