1 Scope
This International Standard specifies a method for the determination of the volume flow-rate in a closed conduit by means of the velocity-area method using propeller-type current-meters under the following conditions:
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a) the velocity distribution is regular (see 6.1.2);
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b) the fluid is water which is clean or considered to be clean 1);
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c) the conduit is full;
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d) the flow is steady 2).
It deals in particular with the technology and calibration of propeller-type current-meters, the measurement of local velocities and the calculation of the flow-rate by velocity integration.