I.S. EN ISO 748:2021
Current
The latest, up-to-date edition.
Hydrometry - Measurement of liquid flow in open channels - Velocity area methods using point velocity measurements (ISO 748:2021)
Hardcopy , PDF
English
19-12-2021
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle of the methods of measurements
5 Site selection
6 Measurement of cross-sectional area
7 Measurement of mean velocity
8 Computation of discharge
9 Uncertainties in flow measurement
Annex A (informative) Use of point velocity current meters
Annex B (informative) Surface velocity measurement using floats
Annex C (informative) Example surface velocity systems
Annex D (informative) Uncertainties in the velocity-area measurement
Annex E (informative) Velocity measurement under ice conditions.
Annex F (informative) Corrections for wetted length of wire when measuring depths with
wire not normal to surface
Bibliography
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