BS ISO 5168:2005
Current
The latest, up-to-date edition.
Measurement of fluid flow. Procedures for the evaluation of uncertainties
Hardcopy , PDF
English
10-08-2005
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
4.1 Symbols
4.2 Subscripts
5 Evaluation of the uncertainty in a measurement process
6 Type A evaluations of uncertainty
6.1 General considerations
6.2 Calculation procedures
7 Type B evaluation of uncertainties
7.1 General considerations
7.2 Calculation procedure
7.3 Rectangular probability distribution
7.4 Normal probability distribution
7.5 Triangular probability distribution
7.6 Bimodal probability distribution
7.7 Assigning a probability distribution
7.8 Asymmetric probability distributions
8 Sensitivity coefficients
8.1 General
8.2 Analytical solution
8.3 Numerical solution
9 Combination of uncertainties
10 Expression of results
10.1 Expanded uncertainty
10.2 Uncertainty budget
Annex A (normative) Step-by-step procedure for calculating uncertainty
Annex B (normative) Probability distributions
Annex C (normative) Coverage factors
Annex D (informative) Basic statistical concepts for use in
Type A assessments of uncertainty
Annex E (informative) Measurement uncertainty sources
Annex F (informative) Correlated input variables
Annex G (informative) Examples
Annex H (informative) The calibration of a flow meter on a
calibration rig
Annex I (informative) Type A and Type B uncertainties in
relation to contributions to uncertainty
from "random" and "systematic" sources of
uncertainty
Annex J (informative) Special situations using two or more meters
in parallel
Annex K (informative) Alternative technique for uncertainty analysis
Bibliography
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