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ISO 1438:2017
M00000078
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ISO 1438:2017 Hydrometry - Open channel flow measurement using thin-plate weirs
standard by International Organization for Standardization, 04/01/2018
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ISO 1438:2017 defines the requirements for the use of rectangular and triangular (V-notch) thin-plate weirs for the measurement of flow of clear water in open channels under free flow conditions. It includes the requirements for the use of full-width rectangular thin-plate weirs in submerged (drowned) flow conditions.