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I.S. CEN ISO/TS 25377:2007

Current

Current

The latest, up-to-date edition.

HYDROMETRIC UNCERTAINTY GUIDANCE (HUG)

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

01-01-2007

Preview

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 ISO/IEC Guide 98 (GUM) - Basic definitions and rules
   5.1 General
   5.2 The uncertainty of sets of measurements
   5.3 Random and systematic effects
   5.4 Uncertainty models - Probability distributions
   5.5 Combining uncertainties - The law of propagation
   5.6 Expressing results
6 Open channel flow - Velocity area methods
   6.1 General
   6.2 Mean velocity, bar{V}[x]
   6.3 Velocity-area determination
   6.4 Stationary determination of velocity
   6.5 Moving determination of velocity
   6.6 Velocity-area uncertainties
   6.7 Integration uncertainties [u*(F[y]),u*(F[z])]
   6.8 Perimeter flow uncertainties, u(Q[p])
7 Open channel flow - Critical depth methods
   7.1 General
   7.2 Head and geometry determination
   7.3 Iterative calculation
   7.4 Evaluating uncertainty
8 Dilution methods
   8.1 General
   8.2 Continuous feed
   8.3 Transient mass
9 Hydrometric instrumentation
   9.1 Performance specifications
   9.2 Validity of uncertainty statements
   9.3 Manufacturer's performance specifications
   9.4 Performance guide for hydrometric equipment for
        use in technical standard examples
10 Guide for the drafting of uncertainty clauses in hydrometric
   standards
   10.1 General
   10.2 Equipment, methods and measurement systems
Annex A (informative) Introduction to hydrometric uncertainty
Annex B (informative) An introduction to Monte Carlo Simulation
                      (MCS)
Annex C (informative) Performance guide for hydrometric
                      equipment for use in technical standard
                      examples
Bibliography

Gives an understanding of the nature of measurement uncertainty and its significance in estimating the quality of a measurement or a determination in hydrometry.

DocumentType
Standard
Pages
63
PublisherName
National Standards Authority of Ireland
Status
Current

Standards Relationship
ISO/TS 25377:2007 Identical
CEN ISO/TS 25377:2007 Identical

ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
ISO 748:2007 Hydrometry Measurement of liquid flow in open channels using current-meters or floats
ISO 5168:2005 Measurement of fluid flow — Procedures for the evaluation of uncertainties
ISO 6416:2017 Hydrometry — Measurement of discharge by the ultrasonic transit time (time of flight) method
ISO/IEC Guide 98:1993 Guide to the expression of uncertainty in measurement (GUM)
EN 45002:1989 GENERAL CRITERIA FOR THE ASSESSMENT OF TESTING LABORATORIES
EN 45011 : 1998 GENERAL REQUIREMENTS FOR BODIES OPERATING PRODUCT CERTIFICATION SYSTEMS
EN 45013 : 1989 GENERAL CRITERIA FOR CERTIFICATION BODIES OPERATING CERTIFICATION OF PERSONNEL
ISO 772:1996 Hydrometric determinations — Vocabulary and symbols

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