90.93 Standard confirmed Jun 30, 2026
ISO
ISO/TC 113/SC 5 Instruments, equipment and data management
International Standard
17.120.20 Flow in open channels
Published
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.
WITHDRAWN
ISO 3455:2007
PUBLISHED
ISO 3455:2021
90.93
Standard confirmed
Jun 30, 2026
