ASTM E83-00

Standard Practice for Verification and Classification of Extensometer

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 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: 09-Dec-2000
• Technical Committee: E28 - Mechanical Testing
• Drafting Committee: E28.01 - Calibration of Mechanical Testing Machines and Apparatus

Relations

• Referred By: ASTM B557-15(2023) - Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
• Effective Date: 10-Dec-2000
• Referred By: ASTM E139-11(2018) - Standard Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials
• Effective Date: 10-Dec-2000
• Referred By: ASTM E2714-13(2020) - Standard Test Method for Creep-Fatigue Testing
• Effective Date: 10-Dec-2000
• Referred By: ASTM D4027-98(2019) - Standard Test Method for Measuring Shear Properties of Structural Adhesives by the Modified-Rail Test
• Effective Date: 10-Dec-2000
• Referred By: ASTM D3410/D3410M-16e1 - Standard Test Method for Compressive Properties of Polymer Matrix Composite Materials with Unsupported Gage Section by Shear Loading
• Effective Date: 10-Dec-2000
• Referred By: ASTM D198-22a - Standard Test Methods of Static Tests of Lumber in Structural Sizes
• Effective Date: 10-Dec-2000
• Referred By: ASTM E238-17a - Standard Test Method for Pin-Type Bearing Test of Metallic Materials
• Effective Date: 10-Dec-2000
• Referred By: ASTM C1899-21 - Standard Test Method for Flexural Strength of Continuous Fiber-Reinforced Advanced Ceramic Tubular Test Specimens at Ambient Temperature
• Effective Date: 10-Dec-2000
• Referred By: ASTM C1275-18 - Standard Test Method for Monotonic Tensile Behavior of Continuous Fiber-Reinforced Advanced Ceramics with Solid Rectangular Cross-Section Test Specimens at Ambient Temperature
• Effective Date: 10-Dec-2000
• Referred By: ASTM E2208-02(2018)e1 - Standard Guide for Evaluating Non-Contacting Optical Strain Measurement Systems
• Effective Date: 10-Dec-2000
• Referred By: ASTM D8510/D8510M-23 - Standard Test Method for Local Buckling and Crippling under Axial Compressive Loading
• Effective Date: 10-Dec-2000
• Referred By: ASTM C1273-18 - Standard Test Method for Tensile Strength of Monolithic Advanced Ceramics at Ambient Temperatures
• Effective Date: 10-Dec-2000
• Referred By: ASTM E9-19 - Standard Test Methods of Compression Testing of Metallic Materials at Room Temperature
• Effective Date: 10-Dec-2000
• Referred By: ASTM D3479/D3479M-19(2023) - Standard Test Method for Tension-Tension Fatigue of Polymer Matrix Composite Materials
• Effective Date: 10-Dec-2000
• Referred By: ASTM E1942-98(2018)e1 - Standard Guide for Evaluating Data Acquisition Systems Used in Cyclic Fatigue and Fracture Mechanics Testing
• Effective Date: 10-Dec-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: E 83 – 00 An American National Standard
Standard Practice for
1
Verification and Classification of Extensometer
This standard is issued under the fixed designation E 83; 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 (e) 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 extensometer reading must be multiplied to obtain the equiva-
lent strain.
1.1 This practice covers procedures for the verification and
3.1.2.1 Discussion—For any extensometer, the calibration
classification of extensometer systems, but it is not intended to
factor is equal to the ratio of change in length to the product of
be a complete purchase specification. The practice is applicable
the gage length and the change in the extensometer reading.
only to instruments that indicate or record values that are
For direct-reading extensometers the calibration factor is unity.
proportional to changes in length corresponding to either
3.1.3 compressometer—a specialized extensometer used for
tensile or compressive strain. Extensometer systems are clas-
sensing negative or compressive strain.
sified on the basis of the magnitude of their errors.
3.1.4 deflectometer—a specialized extensometer used for
1.2 Because strain is a dimensionless quantity, this docu-
sensing of extension or motion, usually without reference to a
ment can be used for extensometers based on either SI or US
specific gage length.
customary units of displacement.
3.1.5 error, in extensometer systems—the value obtained by
NOTE 1—Bonded resistance strain gages directly bonded to a specimen
subtracting the correct value of the strain from the indicated
cannot be calibrated or verified with the apparatus described in this
value given by the extensometer system.
practice for the verification of extensometers having definite gage points.
3.1.6 extensometer—a device for sensing strain. An exten-
(See procedures as described in Test Methods E 251.)
someter may be one of two types:
1.3 This standard does not purport to address all of the
3.1.7 Self-contained type.
safety concerns, if any, associated with its use. It is the
3.1.8 Non-self-contained type (that requires an auxiliary
responsibility of the user of this standard to establish appro-
device (for example, recorder, digital readout, computer dis-
priate safety and health practices and determine the applica-
play, etc.)) for readout of strain values.
bility of regulatory limitations prior to use.
3.1.8.1 Discussion—For some extensometers the gage
length is fixed, while for others the gage length is variable and
2. Referenced Documents
must be set or determined before the linear strain can be
2.1 ASTM Standards:
calculated.
E 6 Terminology Relating to Methods of Mechanical Test-
3.1.9 extensometer systems—a system for sensing and
2
ing
indicating strain.
E 21 Test Methods for Elevated Temperature Tension Tests
3.1.9.1 Discussion—The system may be an extensometer of
2
of Metallic Materials
the self-contained type or the combination of an extensometer
E 251 Test Methods for Performance Characteristics of
of the non-self-contained transducer type with a suitable
2
Metallic Bonded Resistance Strain Gages
readout device.
3.1.10 resolution of the strain indicator—the smallest
3. Terminology
change in strain that can be estimated or ascertained on the
3.1 Definitions: In addition to the terms listed, see Termi-
strain indicating apparatus of the testing system, at any applied
nology E 6.
strain.
3.1.1 calibration—a determination of the calibration factor
3.1.11 resolution of analog type indicator (dials, recorders,
for a system using established procedures.
and so forth)—the strain represented by one graduation mul-
3.1.2 calibration factor—the factor by which the change in
tiplied by the ratio of the width of the pointer or pen line to the
center distance between two adjacent graduation marks. The
typical ratios used are 1:1, 1:2, 1:5, or 1:10. A spacing of 0.10
in. (2.5 mm) or greater is recommended for a resolution equal
1
This practice is under the jurisdiction of ASTM Committee E28 on Mechanical
to the strain represented by 1:10 of a graduation. A ratio less
Testing and is the direct responsibility of Subcommittee E28.01 on Calibration of
Mechanical Testing Machines and Apparatus. than 1:10 should not be used.
Current edition approved Dec. 10, 2000. Published February 2001. Originally
3.1.12 resolution of the digital type strain indicators (nu-
published as E 83 – 50. Last previous edition E 83 – 98.
meric displays, printouts, and so forth)—the resolution is the
2
Annual Book of ASTM Sta
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