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ASTM D5089-95(2008)

(Test Method)

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

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

SIGNIFICANCE AND USE
This test method is particularly used for measuring the velocity at a point in an open channel 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. A single axis probe with cosine response will suffice for most of these applications.
This test method is also useful in applications where the velocity itself (rather than a volumetric flowrate) is the desired end product.
SCOPE
1.1 This test method covers the use of single-axis or dual-axis electromagnetic current meters for the measurement of water velocities in open channels.
1.2 This test method covers only these components and appurtenances of portable open-channel current-meter systems, which are customarily required when an operator is in attendance.
1.3 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.
1.4 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
17.120.20 - Flow in open channels
Technical Committee
D19 - Water
Drafting Committee
D19.07 - Sediments, Geomorphology, and Open-Channel Flow
Current Stage
Ref Project

Relations

Replaces
ASTM D5089-95(2003) - Standard Test Method for Velocity Measurements of Water in Open Channels with Electromagnetic 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 D5089-95(2008) - Standard Test Method for Velocity Measurements of Water in Open Channels with Electromagnetic Current MetersASTM D5089-95(2008) - Standard Test Method for Velocity Measurements of Water in Open Channels with Electromagnetic Current Meters
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ASTM D5089-95(2008) - Standard Test Method for Velocity Measurements of Water in Open Channels with Electromagnetic 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: D5089 − 95(Reapproved 2008)
Standard Test Method for
Velocity Measurements of Water in Open Channels with
1
Electromagnetic Current Meters
This standard is issued under the fixed designation D5089; 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 3455 Liquid Flow Measurement in Open Channels—
Calibration of Rotating Element Current Meters in
1.1 This test method covers the use of single-axis or
Straight Open Tanks
dual-axis electromagnetic current meters for the measurement
of water velocities in open channels.
3. Terminology
1.2 This test method covers only these components and
3.1 Definitions: For definitions of terms used in this test
appurtenancesofportableopen-channelcurrent-metersystems,
method refer to Terminology D1129.
which are customarily required when an operator is in atten-
3.2 Definitions of Terms Specific to This Standard:
dance.
3.2.1 boundary layer—a relatively thin layer of viscous
1.3 The values stated in inch-pound units are to be regarded
influence adjacent to the probe (or any solid) surface caused by
as standard. The values given in parentheses are mathematical
therequirementthatthewatervelocitymustbezeroatthewall.
conversions to SI units that are provided for information only
3.2.2 cosine response—the ability of a meter, placed at an
and are not considered standard.
angle to the oncoming flow, to sense the component of velocity
1.4 This standard does not purport to address all of the
parallel to its axis.
safety concerns, if any, associated with its use. It is the
3.2.3 turbulence—irregular condition of flow in which the
responsibility of the user of this standard to establish appro-
variousquantitiesshowarandomvariationwithtimeandspace
priate safety and health practices and determine the applica-
coordinates so that statistically distinct average values can be
bility of regulatory limitations prior to use.
discerned.
2. Referenced Documents
4. Summary of Test Method
2
2.1 ASTM Standards:
4.1 Electromagnetic liquid flow current meters are based on
D1129 Terminology Relating to Water
the Faraday principle of electromagnetic induction, which
D2777 Practice for Determination of Precision and Bias of
states that voltage is proportional not only to flow speed but
Applicable Test Methods of Committee D19 on Water
also to the magnetic flux density and the distance between
D3858 Test Method for Open-Channel Flow Measurement
electrodes. In the application of the electromagnetic liquid
of Water by Velocity-Area Method
current meter, a conductor (water) moving in a magnetic field
D4409 Test Method for Velocity Measurements of Water in
(created from within the sensor) generates a voltage that is
Open Channels with Rotating Element Current Meters
proportional to the rate of flow of water through the magnetic
3
2.2 ISO Standards:
field. This variable voltage lies in a plane that is perpendicular
ISO 3454 Liquid Flow Measurement in Open Channels—
to both the water velocity vector and the magnetic field vector
Sounding and Suspension Equipment
and is sensed by pairs of electrodes.
5. Significance and Use
1
This test method is under the jurisdiction of ASTM Committee D19 on Water
and is the direct responsibility of Subcommittee D19.07 on Sediments,
5.1 This test method is particularly used for measuring the
Geomorphology, and Open-Channel Flow.
velocity at a point in an open channel as part of a velocity-area
Current edition approved Oct. 1, 2008. Published November 2008. Originally
traverse to determine the flowrate of water. To this end it
approved in 1990. Last previous edition approved in 2003 as D5089 – 95 (2003).
DOI: 10.1520/D5089-95R08.
should be used in conjunction with Test Method D3858.A
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
single axis probe with cosine response will suffice for most of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
these applications.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
5.2 This test method is also useful in applications where the
3
“Measurement of Liquid Flow in Open Channels,” ISO Standards Handbook
velocity itself (rather than a volumetric flowrate) is the desired
16, 1983.Available fromAmerican National Standards Institute (ANSI), 25W. 43rd
St., 4th Floor, New York, NY 10036, http://www.ansi.org. end product.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5089 − 95 (2008)
6. Interferences 7.1.7 All
...

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