ASTM E83-06

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 gages directly bonded to a specimen cannot be calibrated or verified with the apparatus described in this practice for the verification of extensometers having definite gage points. (See procedures as described in Test Methods E 251.)
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-Apr-2006
• ICS: 19.060 - Mechanical testing
• Technical Committee: E28 - Mechanical Testing
• Drafting Committee: E28.01 - Calibration of Mechanical Testing Machines and Apparatus

Relations

• Replaces: ASTM E83-02 - Standard Practice for Verification and Classification of Extensometer System
• Effective Date: 01-May-2006
• Replaced By: ASTM E83-10 - Standard Practice for Verification and Classification of Extensometer Systems
• Effective Date: 01-Jan-2010
• Referred By: ASTM E8/E8M-22 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-May-2006
• Referred By: ASTM D198-22a - Standard Test Methods of Static Tests of Lumber in Structural Sizes
• Effective Date: 01-May-2006
• Referred By: ASTM F2977-20 - Standard Test Method for Small Punch Testing of Polymeric Biomaterials Used in Surgical Implants
• Effective Date: 01-May-2006
• Referred By: ASTM C1424-15(2019) - Standard Test Method for Monotonic Compressive Strength of Advanced Ceramics at Ambient Temperature
• Effective Date: 01-May-2006
• Referred By: ASTM E238-17a - Standard Test Method for Pin-Type Bearing Test of Metallic Materials
• Effective Date: 01-May-2006
• Referred By: ASTM D2105-01(2019) - Standard Test Method for Longitudinal Tensile Properties of “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Tube
• Effective Date: 01-May-2006
• Referred By: ASTM D3983-98(2019) - Standard Test Method for Measuring Strength and Shear Modulus of Nonrigid Adhesives by the Thick-Adherend Tensile-Lap Specimen
• Effective Date: 01-May-2006
• Referred By: ASTM F2516-22 - Standard Test Method for Tension Testing of Nickel-Titanium Superelastic Materials
• Effective Date: 01-May-2006
• Referred By: ASTM E111-17 - Standard Test Method for Young’s Modulus, Tangent Modulus, and Chord Modulus
• Effective Date: 01-May-2006
• Referred By: ASTM C469/C469M-22 - Standard Test Method for Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression
• Effective Date: 01-May-2006
• Referred By: ASTM E251-20a - Standard Test Methods for Performance Characteristics of Metallic Bonded Resistance Strain Gages
• Effective Date: 01-May-2006
• Referred By: ASTM C1358-18 - Standard Test Method for Monotonic Compressive Strength Testing of Continuous Fiber-Reinforced Advanced Ceramics with Solid Rectangular Cross Section Test Specimens at Ambient Temperatures
• Effective Date: 01-May-2006
• Referred By: ASTM E2760-19e1 - Standard Test Method for Creep-Fatigue Crack Growth Testing
• Effective Date: 01-May-2006

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 – 06
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 3.1.1 calibration—a determination of the calibration factor
for a system using established procedures.
1.1 This practice covers procedures for the verification and
3.1.2 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
3.1.2.1 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 gage 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-
3.1.3 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.
3.1.4 deflectometer—a specialized extensometer used for
NOTE 1—Bonded resistance strain gages directly bonded to a specimen
sensing of extension or motion, usually without reference to a
cannot be calibrated or verified with the apparatus described in this
specific gage length.
practice for the verification of extensometers having definite gage points.
3.1.5 error, in extensometer systems—the value obtained by
(See procedures as described in Test Methods E251.)
subtracting the correct value of the strain from the indicated
1.3 This standard does not purport to address all of the
value given by the extensometer system.
safety concerns, if any, associated with its use. It is the
3.1.6 extensometer, n—a device for sensing strain.
responsibility of the user of this standard to establish appro-
3.1.7 extensometer systems—a system for sensing and indi-
priate safety and health practices and determine the applica-
cating strain.
bility of regulatory limitations prior to use.
3.1.7.1 Discussion—The system will normally include an
extensometer, conditioning electronics and auxiliary device
2. Referenced Documents
(recorder, digital readout, computer, etc.). However, com-
2
2.1 ASTM Standards:
pletely self-contained mechanical devices are permitted. An
E6 TerminologyRelatingtoMethodsofMechanicalTesting
extensometer system may be one of three types.
E21 Test Methods for Elevated Temperature Tension Tests
3.1.8 Type 1 extensometer system, n—an extensometer sys-
of Metallic Materials
tem which both defines gage length and senses extension, for
E251 Test Methods for Performance Characteristics of Me-
example, a clip-on strain gage type with conditioning electron-
tallic Bonded Resistance Strain Gauges
ics.
3.1.9 Type 2 extensometer system, n—an extensometer
3. Terminology
which senses extension and the gage length is defined by
3.1 Definitions: In addition to the terms listed, see Termi-
specimen geometry or specimen features such as ridges or
nology E6.
notches.
3.1.9.1 Discussion—A Type 2 extensometer is used where
1
the extensometer gage length is determined by features on the
This practice is under the jurisdiction ofASTM Committee E28 on Mechanical
Testing and is the direct responsibility of Subcommittee E28.01 on Calibration of
specimen, for example, ridges, notches, or overall height (in
Mechanical Testing Machines and Apparatus.
case of compression test piece). The precision associated with
Current edition approved May 1, 2006. Published June 2006. Originally
gage length setting for a Type 2 extensometer should be
approved in 1950. Last previous edition approved in 2002 as E83 – 02. DOI:
10.1520/E0083-06. specified in relevant test method or product standard. The
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
position readout on a testing machine is not recommended for
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
use in a Type 2 extensometer system.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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