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Significance and Use
5.1 This test method describes the design and use of various types of current meters. These current meters are commonly used to measure the velocity at a point in an open channel cross section as part of a velocity-area traverse to determine the flowrate of water. To this end it should be used in conjunction with Test Method D3858.
1.1 This test method describes the design and use of cup-type or vane-type vertical axis current meters and propeller-type horizontal axis current meters for measuring water velocities in open channels.
1.2 This test method is intended primarily for those meters customarily used in open-channel hydraulic (as distinguished from oceanographic) applications with an operator in attendance.
1.3 This test method is intended primarily for current meters that measure one component or filament of flow.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ISO StandardsISO 2537 Liquid Flow Measurement in Open Channels--Rotating Element Current Meters ISO 3454 Liquid Flow Measurement in Open Channels--Direct Depth Sounding and Suspension Equipment ISO 3455 Liquid Flow Measurement in Open Channels--Calibration of Rotating-Element Current Meters in Straight Open Tanks
D1129 Terminology Relating to Water
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D3858 Test Method for Open-Channel Flow Measurement of Water by Velocity-Area Method
ICS Number Code 17.120.10 (Flow in closed conduits)
ASTM D4409-95(2014), Standard Test Method for Velocity Measurements of Water in Open Channels with Rotating Element Current Meters, ASTM International, West Conshohocken, PA, 2014, www.astm.orgBack to Top