PD ISO/TR 9824:2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Characteristics of a closed conduit system
  4.1 Physical structure
  4.2 Construction
  4.3 Flow conditions
  4.4 Environment
5 Selection of method
  5.1 General
  5.2 Factors
6 Methods of measurement
  6.1 Volumetric methods
  6.2 Tracer and dilution method
  6.3 Flow measurement structures
  6.4 Ultrasonic Doppler
  6.5 'Transit time' ultrasonic flow meters
  6.6 Electromagnetic method
  6.7 Slope-area method
  6.8 Non-contact methods
  6.9 Spot flow measurements, evaluation and
      verification
7 Final selection of method
Annex A (informative) Guide to the selection
        of methods
Bibliography

Gives a synopsis of the methods of flow gauging that can be deployed in closed conduits flowing part full, i.e. with a free open water surface. It also gives a brief description of each method with particular reference to other International Standards where appropriate, the attributes and limitations of each technique, possible levels of uncertainty in the flow determinations and specific equipment requirements.

This Technical Report provides a synopsis of the methods of flow gauging that can be deployed in closed conduits flowing part full, i.e. with a free open water surface. It provides a brief description of each method with particular reference to other International Standards where appropriate, the attributes and limitations of each technique, possible levels of uncertainty in the flow determinations and specific equipment requirements. The uncertainties quoted herein are expanded uncertainties with a coverage factor of 2 and an approximate confidence level of 95%.