ASTM E2428-22

Standard Practice for Calibration and Verification of Elastic Torque Measurement Standards

SIGNIFICANCE AND USE
4.1 Testing machines that apply and indicate torque are in general use in many industries. Practice E2624 has been written to provide a practice for the torque calibration and verification of these testing machines. A necessary element in Practice E2624 is the use of elastic torque measurement standards whose torque characteristics are known to be metrologically traceable to the International System of Units (SI). Practice E2428 describes how these elastic torque measurement standards are to be calibrated. The procedures are useful to users of testing machines, manufacturers and providers of elastic torque measurement standards, calibration laboratories that provide calibration services and documents of metrological traceability, service organizations using elastic torque measurement standards to calibrate and verify testing machines, and testing laboratories performing general structural test measurements.
SCOPE
1.1 The purpose of this practice is to specify the procedure for the calibration and verification of elastic torque measurement standards.  
1.2 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.  
1.3 This practice is intended for the calibration of static elastic torque measurement standards. The practice is not applicable for dynamic or high-speed torque calibrations or measurements, nor can the results of calibrations performed in accordance with this practice be assumed valid for dynamic or high-speed torque measurements.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Oct-2022
• ICS: 19.100 - Non-destructive testing
• Technical Committee: E28 - Mechanical Testing
• Drafting Committee: E28.01 - Calibration of Mechanical Testing Machines and Apparatus

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:E2428 −22
Standard Practice for
Calibration and Verification of Elastic Torque Measurement
1
Standards
This standard is issued under the fixed designation E2428; 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.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
3
1. Scope* 2.2 ASME Standard:
B46.1Surface Texture (Surface Roughness, Waviness, and
1.1 The purpose of this practice is to specify the procedure
Lay)
for the calibration and verification of elastic torque measure-
4
2.3 BIPM Standard:
ment standards.
JCGM200Internationalvocabularyofmetrology–Basicand
1.2 Units—The values stated in SI units are to be regarded
general concepts and associated terms (VIM)
as standard. The values given in parentheses after SI units are
providedforinformationonlyandarenotconsideredstandard.
3. Terminology
1.3 This practice is intended for the calibration of static
3.1 Definitions:
elastic torque measurement standards. The practice is not
3.1.1 Refer to Terminology E6 for the definitions of
applicable for dynamic or high-speed torque calibrations or
calibration, metrological traceability, resolution, and verifica-
measurements, nor can the results of calibrations performed in
tion.
accordance with this practice be assumed valid for dynamic or
3.1.2 primary torque measurement standard, n—A dead-
high-speed torque measurements.
weight force applied through a moment arm, all with metro-
1.4 This standard does not purport to address all of the logical traceability to the International System of Units (SI).
safety concerns, if any, associated with its use. It is the
3.1.3 secondary torque measurement standard, n—An in-
responsibility of the user of this standard to establish appro-
strument or mechanism, the calibration of which has been
priate safety, health, and environmental practices and deter-
establishedbyacomparisonwithprimarytorquemeasurement
mine the applicability of regulatory limitations prior to use.
standard(s).
1.5 This international standard was developed in accor-
3.2 Definitions of Terms Specific to This Standard:
dance with internationally recognized principles on standard-
3.2.1 calibration equation, n—A mathematical relationship
ization established in the Decision on Principles for the
between deflection and torque established from the calibration
Development of International Standards, Guides and Recom-
data for use with the elastic torque measurement standard in
mendations issued by the World Trade Organization Technical
service.
Barriers to Trade (TBT) Committee.
3.2.2 creep, n—The change in indication of the elastic
torque measurement standard under constant applied torque.
2. Referenced Documents
3.2.2.1 Discussion—Creep is expressed as a percentage of
2
2.1 ASTM Standards:
theindicatedchangeataconstantappliedtorquefromaninitial
E6Terminology Relating to Methods of MechanicalTesting
time following the achievement of mechanical and electrical
E29Practice for Using Significant Digits in Test Data to
stability and the time at which the test is concluded. The
Determine Conformance with Specifications
stabilities of secondary torque measurement standards and
E2624Practice for Torque Calibration of Testing Machines
primary torque measurement standards are usually adequate to
measure creep during the test time interval. Creep results from
a time-dependent, elastic deformation of the elastic member of
1
ThispracticeisunderthejurisdictionofASTMCommitteeE28onMechanical
the elastic torque measurement standard. In the case of elastic
Testing and is the direct responsibility of Subcommittee E28.01 on Calibration of
torque measurement standards, creep is minimized by strain
Mechanical Testing Machines and Apparatus.
Current edition approved Nov. 1, 2022. Published January 2023. Originally
approved in 2008. Last previous edition approved in 2015 as E2428–15a. DOI:
3
10.1520/E2428-22. Available from American Society of Mechanical Engineers (ASME), ASME
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM www.asme.org.
4
Standards volume information, refer to the standard’s Document Summary page on Available from BIPM, Pavillon de Breteuil, F-92312 Sèvres Cedex. http://
the ASTM website. www.bipm.org
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Co
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: E2428 − 15a E2428 − 22
Standard Practice for
Calibration and Verification of Elastic Torque
1
TransducersMeasurement Standards
This standard is issued under the fixed designation E2428; 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 Scope*
1.1 The purpose of this practice is to specify the procedure for the calibration and verification of elastic torque transducers.mea-
surement standards.
NOTE 1—Verification by deadweight and a lever arm is an acceptable method of verifying the torque indication of a testing machine. Tolerances for
weights used are tabulated in Practice E2624; methods for calibration of the weights are given in NIST Technical Note 577, Methods of Calibrating
2
Weights for Piston Gages.
1.2 Units—The values stated in SI units are to be regarded as standard. Other metric and inch-pound values are regarded as
equivalent when required. The values given in parentheses after SI units are provided for information only and are not considered
standard.
1.3 This practice is intended for the calibration of static elastic torque measuring instruments.measurement standards. The practice
is not applicable for dynamic or high-speed torque calibrations or measurements, nor can the results of calibrations performed in
accordance with this practice be assumed valid for dynamic or high speed high-speed torque measurements.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
E6 Terminology Relating to Methods of Mechanical Testing
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E2624 Practice for Torque Calibration of Testing Machines
3
2.2 ASME Standard:
B46.1 Surface Texture (Surface Roughness, Waviness, and Lay)
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 May 15, 2015Nov. 1, 2022. Published May 2015January 2023. Originally approved in 2008. Last previous edition approved in 2015 as
E2428–15.–15a. DOI: 10.1520/E2428-15A.10.1520/E2428-22.
3
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.org.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E2428 − 22
4
2.3 BIPM StandardStandard:
JCGM 200 International vocabulary of metrology–Basic and general concepts and associated terms (VIM)
3. Terminology
3.1 Definitions:
3.1.1 Refer to Terminology E6 for the definitions of calibration, metrological traceability, resolution, and verification.
3.1.2 primary torque standard—measurement standard, n—aA deadweight force applied through a lever arm or wheel, all
displayingmoment arm, all with metrological traceability to the International System of Units (SI).
3.1.1.1 Discussion—
for further definition of the term metrological traceability, refer to the latest revision of JCGM:200.
3.1.3 secondary torque standard—measurement standard, n—anAn instrument or mechanism, the calibration of which has been
established by a comparison with a primary torque measurement standard(s).
3.2 Definitions of Terms Specific to This Standard:
3.2.1 calibration equa
...