BS 5857-2.4 80th Edition, March 31, 1980
Measurement of Fluid Flow in Closed Conduits, Using Tracers Part 2: Measurement of Gas Flow Section 2.4: Transit Time Method Using Radioactive Tracers
Includes all amendments and changes through Reaffirmation Notice , 1986
Additional Comments: SAME AS ISO 4053/4
Published By:British Standards Institution (BSI)
Gives the principle of the measurement method, required tracer conditions, choice of measuring length of conduit, measurement procedure, selection of tracer, estimation of uncertainties in flowrate measurement and flowrate calculation.