ASTM E83-10a

Standard Practice for Verification and Classification of Extensometer Systems

ABSTRACT
This practice covers procedures for the verification and classification of extensometer systems, but it is not intended to be a complete purchase specification. The practice is applicable only to instruments that indicate or record values that are proportional to changes in length corresponding to either tensile or compressive strain. Extensometer systems are classified on the basis of the magnitude of their errors. The apparatus for verifying extensometer systems shall provide a means for applying controlled displacements to a simulated specimen and for measuring these displacements accurately. Extensometer systems shall be classified in accordance with the requirements as to maximum error of strain indicated: Class A; Class B-1; Class B-2; Class C; Class D; and Class E. Extensometer systems shall be categorized in three types according to gage length: Type 1; Type 2; and Type 3. A verification procedure for extensometer systems shall be done in accordance with the specified requirements.
SCOPE
1.1 This practice covers procedures for the verification and classification of extensometer systems, but it is not intended to be a complete purchase specification. The practice is applicable only to instruments that indicate or record values that are proportional to changes in length corresponding to either tensile or compressive strain. Extensometer systems are classified on the basis of the magnitude of their errors.
1.2 Because strain is a dimensionless quantity, this document can be used for extensometers based on either SI or US customary units of displacement.
Note 1—Bonded resistance strain gauges directly bonded to a specimen cannot be calibrated or verified with the apparatus described in this practice for the verification of extensometers having definite gauge points. (See procedures as described in Test Methods E251.)  
1.3 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: 31-May-2010
• ICS: 19.060 - Mechanical testing
• Technical Committee: E28 - Mechanical Testing
• Drafting Committee: E28.01 - Calibration of Mechanical Testing Machines and Apparatus

Relations

• Replaces: ASTM E83-10 - Standard Practice for Verification and Classification of Extensometer Systems
• Effective Date: 01-Jun-2010
• Referred By: ASTM C1773-21 - Standard Test Method for Monotonic Axial Tensile Behavior of Continuous Fiber-Reinforced Advanced Ceramic Tubular Test Specimens at Ambient Temperature
• Effective Date: 01-Jun-2010
• Referred By: ASTM C1366-19 - Standard Test Method for Tensile Strength of Monolithic Advanced Ceramics at Elevated Temperatures
• Effective Date: 01-Jun-2010
• Referred By: ASTM D7913/D7913M-14(2020) - Standard Test Method for Bond Strength of Fiber-Reinforced Polymer Matrix Composite Bars to Concrete by Pullout Testing
• Effective Date: 01-Jun-2010
• Referred By: ASTM C1499-19 - Standard Test Method for Monotonic Equibiaxial Flexural Strength of Advanced Ceramics at Ambient Temperature
• Effective Date: 01-Jun-2010
• Referred By: ASTM E251-20a - Standard Test Methods for Performance Characteristics of Metallic Bonded Resistance Strain Gages
• Effective Date: 01-Jun-2010
• Referred By: ASTM A1034/A1034M-23 - Standard Test Methods for Testing Mechanical Splices for Steel Reinforcing Bars
• Effective Date: 01-Jun-2010
• Referred By: ASTM D790-17 - Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
• Effective Date: 01-Jun-2010
• Referred By: ASTM D8510/D8510M-23 - Standard Test Method for Local Buckling and Crippling under Axial Compressive Loading
• Effective Date: 01-Jun-2010
• Referred By: ASTM D1621-16(2023) - Standard Test Method for Compressive Properties of Rigid Cellular Plastics
• Effective Date: 01-Jun-2010
• Referred By: ASTM E1856-13(2021) - Standard Guide for Evaluating Computerized Data Acquisition Systems Used to Acquire Data from Universal Testing Machines
• Effective Date: 01-Jun-2010
• Referred By: ASTM E8/E8M-22 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Jun-2010
• Referred By: ASTM A370-23 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Jun-2010
• Referred By: ASTM E111-17 - Standard Test Method for Young’s Modulus, Tangent Modulus, and Chord Modulus
• Effective Date: 01-Jun-2010
• Referred By: ASTM D5083-17 - Standard Test Method for Tensile Properties of Reinforced Thermosetting Plastics Using Straight-Sided Specimens
• Effective Date: 01-Jun-2010

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:E83 −10a
Standard Practice for
1
Verification and Classification of Extensometer Systems
This standard is issued under the fixed designation E83; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3.1.2 calibration—a determination of the calibration factor
for a system using established procedures.
1.1 This practice covers procedures for the verification and
3.1.3 calibration factor—the factor by which the change in
classification of extensometer systems, but it is not intended to
extensometer reading must be multiplied to obtain the equiva-
beacompletepurchasespecification.Thepracticeisapplicable
lent strain.
only to instruments that indicate or record values that are
3.1.3.1 Discussion—For any extensometer, the calibration
proportional to changes in length corresponding to either
factor is equal to the ratio of change in length to the product of
tensile or compressive strain. Extensometer systems are clas-
the gauge length and the change in the extensometer reading.
sified on the basis of the magnitude of their errors.
For direct-reading extensometers the calibration factor is unity.
1.2 Because strain is a dimensionless quantity, this docu-
3.1.4 compressometer—a specialized extensometer used for
ment can be used for extensometers based on either SI or US
sensing negative or compressive strain.
customary units of displacement.
3.1.5 deflectometer—a specialized extensometer used for
NOTE 1—Bonded resistance strain gauges directly bonded to a speci-
sensing of extension or motion, usually without reference to a
men cannot be calibrated or verified with the apparatus described in this
practicefortheverificationofextensometershavingdefinitegaugepoints. specific gauge length.
(See procedures as described in Test Methods E251.)
3.1.6 error, in extensometer systems—the value obtained by
1.3 This standard does not purport to address all of the
subtracting the correct value of the strain from the indicated
safety concerns, if any, associated with its use. It is the
value given by the extensometer system.
responsibility of the user of this standard to establish appro-
3.1.7 extensometer, n—a device for sensing strain.
priate safety and health practices and determine the applica-
3.1.8 extensometer systems—a system for sensing and indi-
bility of regulatory limitations prior to use.
cating strain.
3.1.8.1 Discussion—The system will normally include an
2. Referenced Documents
extensometer, conditioning electronics and auxiliary device
2
2.1 ASTM Standards:
(recorder, digital readout, computer, etc.). However, com-
E6 Terminology Relating to Methods of Mechanical Testing
pletely self-contained mechanical devices are permitted. An
E21 TestMethodsforElevatedTemperatureTensionTestsof
extensometer system may be one of three types.
Metallic Materials
3.1.9 Type 1 extensometer system, n—an extensometer sys-
E251 Test Methods for Performance Characteristics of Me-
tem which both defines gauge length and senses extension, for
tallic Bonded Resistance Strain Gages
example, a clip-on strain gauge type with conditioning elec-
3. Terminology tronics.
3.1.10 Type 2 extensometer system, n—an extensometer
3.1 Definitions:
which senses extension and the gauge length is defined by
3.1.1 In addition to the terms listed, see Terminology E6.
specimen geometry or specimen features such as ridges or
notches.
1
This practice is under the jurisdiction ofASTM Committee E28 on Mechanical
3.1.10.1 Discussion—AType 2 extensometer is used where
Testing and is the direct responsibility of Subcommittee E28.01 on Calibration of
the extensometer gauge length is determined by features on the
Mechanical Testing Machines and Apparatus.
specimen, for example, ridges, notches, or overall height (in
CurrenteditionapprovedJune1,2010.PublishedJuly2010.Originallyapproved
case of compression test piece). The precision associated with
in 1950. Last previous edition approved in 2010 as E83 – 10. DOI: 10.1520/E0083-
10A.
gauge length setting for a Type 2 extensometer should be
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
specified in relevant test method or product standard. The
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
position readout on a testing machine is not recommended for
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. use in a Type 2 extensometer system.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-29
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:E83–10 Designation: E83 – 10a
Standard Practice for
1
Verification and Classification of Extensometer Systems
This standard is issued under the fixed designation E83; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This practice covers procedures for the verification and classification of extensometer systems, but it is not intended to be
acompletepurchasespecification.Thepracticeisapplicableonlytoinstrumentsthatindicateorrecordvaluesthatareproportional
to changes in length corresponding to either tensile or compressive strain. Extensometer systems are classified on the basis of the
magnitude of their errors.
1.2 Becausestrainisadimensionlessquantity,thisdocumentcanbeusedforextensometersbasedoneitherSIorUScustomary
units of displacement.
NOTE 1—Bonded resistance strain gauges directly bonded to a specimen cannot be calibrated or verified with the apparatus described in this practice
for the verification of extensometers having definite gauge points. (See procedures as described in Test Methods E251.)
1.3 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
2
2.1 ASTM Standards:
E6 Terminology Relating to Methods of Mechanical Testing
E21 Test Methods for Elevated Temperature Tension Tests of Metallic Materials
E251 Test Methods for Performance Characteristics of Metallic Bonded Resistance Strain Gauges
3. Terminology
3.1 Definitions: In addition to the terms listed, see Terminology E6.
3.1.1 calibration—a determination of the calibration factor for a system using established procedures.
3.1.2 calibration factor—the factor by which the change in extensometer reading must be multiplied to obtain the equivalent
strain.
3.1.2.1 Discussion—For any extensometer, the calibration factor is equal to the ratio of change in length to the product of the
gauge length and the change in the extensometer reading. For direct-reading extensometers the calibration factor is unity.
3.1.3 compressometer—a specialized extensometer used for sensing negative or compressive strain.
3.1.4 deflectometer—aspecializedextensometerusedforsensingofextensionormotion,usuallywithoutreferencetoaspecific
gauge length.
3.1.5 error, in extensometer systems—the value obtained by subtracting the correct value of the strain from the indicated value
given by the extensometer system.
3.1.6 extensometer, n—a device for sensing strain.
3.1.7 extensometer systems—a system for sensing and indicating strain.
3.1.7.1 Discussion—Thesystemwillnormallyincludeanextensometer,conditioningelectronicsandauxiliarydevice(recorder,
digital readout, computer, etc.). However, completely self-contained mechanical devices are permitted. An extensometer system
may be one of three types.
3.1.8 Type 1 extensometer system, n—an extensometer system which both defines gauge length and senses extension, for
example, a clip-on strain gauge type with conditioning electronics.
1
This practice is under the jurisdiction of ASTM Committee E28 on Mechanical Testing and is the direct responsibility of Subcommittee E28.01 on Calibration of
Mechanical Testing Machines and Apparatus.
Current edition approved Jan.June 1, 2010. Published FebruaryJuly 2010. Originally approved in 1950. Last previous edition approved in 20062010 as E83–06.E83 – 10.
DOI: 10.1520/E0083-10A.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
E83 – 10a
3.1.9 Type 2 extensometer system, n—an extensometer which senses extension and the gauge length is defined by specimen
geometry or specimen features such as ridges or notches.
3.1.9.1 Discussion—A Type 2 extensometer is used where the extensometer gauge length is determined by features o
...