BS ISO 3455:2021

This standard BS ISO 3455:2021 Hydrometry. Calibration of current-meters in straight open tanks is classified in these ICS categories:

• 17.120.20 Flow in open channels

This document specifies a calibration method for mechanical type, electromagnetic type and acoustic type hydrometric current-meters used for point velocity measurement of flowing water. The method requires towing the instrument through still water in a straight open tank. It includes measuring apparatus, the calibration procedure, the method of presenting the results and the uncertainties associated with the method.