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ASTM D4409-95(2008)

(Test Method)

Standard Test Method for Velocity Measurements of Water in Open Channels with Rotating Element Current Meters

Standard Test Method for Velocity Measurements of Water in Open Channels with Rotating Element Current Meters

SIGNIFICANCE AND USE
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 D 3858.
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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.

General Information

Status
Historical
Publication Date
30-Sep-2008
ICS
17.120.10 - Flow in closed conduits
Technical Committee
D19 - Water
Drafting Committee
D19.07 - Sediments, Geomorphology, and Open-Channel Flow
Current Stage
Ref Project

Relations

Replaces
ASTM D4409-95(2003) - Standard Test Method for Velocity Measurements of Water in Open Channels with Rotating Element Current Meters
Effective Date
01-Oct-2008
Referred By
ASTM C1814/C1814M-20 - Standard Test Method for Measurement of Hydraulic Characteristics of Stormwater Filtration Elements
Effective Date
01-Oct-2008
Referred By
ASTM C1745/C1745M-18 - Standard Test Method for Measurement of Hydraulic Characteristics of Hydrodynamic Stormwater Separators and Underground Settling Devices
Effective Date
01-Oct-2008

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ASTM D4409-95(2008) - Standard Test Method for Velocity Measurements of Water in Open Channels with Rotating Element Current MetersASTM D4409-95(2008) - Standard Test Method for Velocity Measurements of Water in Open Channels with Rotating Element Current Meters
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ASTM D4409-95(2008) - Standard Test Method for Velocity Measurements of Water in Open Channels with Rotating Element Current Meters
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D4409 − 95(Reapproved 2008)
Standard Test Method for
Velocity Measurements of Water in Open Channels with
1
Rotating Element Current Meters
This standard is issued under the fixed designation D4409; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope ISO 3454 Liquid Flow Measurement in Open Channels—
Direct Depth Sounding and Suspension Equipment
1.1 This test method describes the design and use of
ISO 3455 Liquid Flow Measurement in Open Channels—
cup-type or vane-type vertical axis current meters and
Calibration of Rotating-Element Current Meters in
propeller-type horizontal axis current meters for measuring
Straight Open Tanks
water velocities in open channels.
1.2 This test method is intended primarily for those meters
3. Terminology
customarily used in open-channel hydraulic (as distinguished
3.1 Definitions: For definitions of other terms used in this
from oceanographic) applications with an operator in atten-
test method, refer to Terminology D1129.
dance.
3.2 Definitions of Terms Specific to This Standard:
1.3 Thistestmethodisintendedprimarilyforcurrentmeters
3.2.1 current meter—an instrument used to measure the
that measure one component or filament of flow.
speed or velocity of flowing water at a point.
1.4 The values stated in inch-pound units are to be regarded
3.2.2 Price-type current meters—generic name for specific
as standard. The values given in parentheses are mathematical
vertical axis meters with a rotating element consisting of six
conversions to SI units that are provided for information only
4
conical cups and constructed as described in Refs (1-3).
and are not considered standard.
1.5 This standard does not purport to address all of the
3.2.3 spin test— a test performed to check the bearings of a
safety concerns, if any, associated with its use. It is the current meter. This test is used primarily with vertical axis
responsibility of the user of this standard to establish appro-
current meters.
priate safety and health practices and determine the applica-
3.2.4 turbulence—irregular condition of flow in which the
bility of regulatory limitations prior to use.
velocity exhibits a random variation with time and space
coordinates so that statistically distinct average values can be
2. Referenced Documents
discerned.
2
2.1 ASTM Standards:
D1129 Terminology Relating to Water
4. Summary of Test Method
D2777 Practice for Determination of Precision and Bias of
Applicable Test Methods of Committee D19 on Water 4.1 The angular velocity of the rotating element is a
function of water speed at the point of immersion.This angular
D3858 Test Method for Open-Channel Flow Measurement
of Water by Velocity-Area Method velocity is determined from the meter output and its functional
3
relation to the water speed is determined by calibration.
2.2 ISO Standards:
ISO 2537 Liquid Flow Measurement in Open Channels—
Rotating Element Current Meters 5. Significance and Use
5.1 This test method describes the design and use of various
1
This test method is under the jurisdiction of ASTM Committee D19 on Water
types of current meters. These current meters are commonly
and is the direct responsibility of Subcommittee D19.07 on Sediments,
usedtomeasurethevelocityatapointinanopenchannelcross
Geomorphology, and Open-Channel Flow.
Current edition approved Oct. 1, 2008. Published November 2008. Originally
section as part of a velocity-area traverse to determine the
approved in 1984. Last previous edition approved in 2003 as D4409 – 95 (2003).
flowrate of water. To this end it should be used in conjunction
DOI: 10.1520/D4409-95R08.
with Test Method D3858.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
4
3
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St., The boldface numbers refer to the list of references at the end of this test
4th Floor, New York, NY 10036, http://www.ansi.org. method.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4409 − 95 (2008)
6. Interferences by magnetic, optical, or other methods, and shall produce a
signal which is audible, visible, or recordable by other means.
6.1 As with any intrusive flow measuring device, rotating
7.1.3.1 Amechanical-electriccontactdeviceshallnotaddin
element current meters are subject to damage by debris,
any
...

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