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Description of BS EN ISO 16911-1:2013 2013ENÂ ISOÂ 16911-1 specifies a method for periodic determination of the axial velocity and volume flow rate of gas within emissions ducts and stacks. It is applicable for use in circular or rectangular ducts with measurement locations meeting the requirements of ENÂ 15259. Minimum and maximum duct sizes are driven by practical considerations of the measurement devices described within ENÂ ISOÂ 16911-1. ENÂ ISOÂ 16911-1 requires all flow measurements to have demonstrable metrological traceability to national or international primary standards. To be used as a standard reference method, the user is required to demonstrate that the performance characteristics of the method are equal to or better than the performance criteria defined in ENÂ ISOÂ 16911-1 and that the overall uncertainty of the method, expressed with a level of confidence of 95 %, is determined and reported. The results for each method defined in ENÂ ISOÂ 16911-1 have different uncertainties within a range of 1Â % to 10Â % at flow velocities of 20Â m/s. Methods further to these can be used provided that the user can demonstrate equivalence, based on the principles of CEN/TSÂ 14793.[10]
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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