I.S. EN ISO 14956:2002

Foreword
Introduction
1 Scope
2 Normative reference
3 Terms and definitions
4 Symbols and abbreviated terms
5 Principle
6 Requirements
   6.1 Methods and materials
   6.2 Performance characteristics
   6.3 Required measurement quality
7 Required performance related to dynamic conditions
   7.1 General
   7.2 Response time
8 Required performance related to stationary conditions
   8.1 Analytical function, model function and variance
       function
   8.2 Identification of sources of uncertainty
   8.3 Assignment of sources of uncertainty to performance
       characteristics
   8.4 Definition and quantification of conditions of operation
       of the measurement system
   8.5 Quantification of the impact of selected performance
       characteristics as partial standard uncertaintective
        degrees of freedom
   8.6 Estimation of the combined standard uncertainty
   8.7 Estimation of the expanded uncertainty
   8.8 Evaluation of compliance with the required measurement
       quality
9 Field verification
10 Report
Annex A (informative) Default ranges of chemical interferents
Annex B (normative) Coverage factors derived from effective
        degrees of freedom
Annex C (informative) Example of an assessment of compliance
        of UV fluorescence method for SO[2] with requirements
        on ambient air quality
Annex D (informative) Examples of field verification programmes
Bibliography

Applies to measurement procedures whose output is a defined time average.