ASTM E2658-15

Standard Practices for Verification of Speed for Material Testing Machines

SIGNIFICANCE AND USE
4.1 Material testing requires repeatable and predictable testing machine speed. The speed measuring devices integral to the testing machines may be used for measurement of crosshead speed over a defined range of operation. The accuracy of the speed value shall be traceable to a National or International Standards Laboratory. Practices E2658 provides procedures to verify testing machines, in order that the indicated speed values may be traceable. A key element to having traceability is that the devices used in the verification produce known speed characteristics, and have been calibrated in accordance with adequate calibration standards.  
4.2 Verification of testing machine speed at a minimum consists of either or both of the following options:  
4.2.1 Verifying the capability of the testing machine to move the crosshead at the speed selected.  
4.2.2 Verifying the capability of the testing machine to adequately indicate the speed of the crosshead.  
4.3 Where applicable, determine the testing machine's ramp-to-speed condition. This condition can be significant especially when verifying fast speeds or testing conditions with very short testing durations.  
4.4 This procedure will establish the relationship between the actual crosshead speed and the testing machine indicated speed and or selected setting. It is this relationship that will allow confidence in the reported displacement over time data acquired by the testing machine during use.
Note 1: Many material tests never reach the desired test speed. Unless the actual data from the material test is examined, it is often impossible to know if the test speed has been reached or is repeatable from test to test.
SCOPE
1.1 These practices cover procedures and requirements for the calibration and verification of testing machine speed by means of standard calibration devices. This practice is not intended to be complete purchase specifications for testing machines.  
1.2 These practices apply to the verification of the speed application and measuring systems associated with the testing machine, such as a scale, dial, marked or unmarked recorder chart, digital display, setting, etc. In all cases the buyer/owner/user must designate the speed-measuring system(s) to be verified.  
1.3 These practices give guidance, recommendations, and examples, specific to electro-mechanical testing machines. The practice may also be used to verify actuator speed for hydraulic testing machines.  
1.4 This standard cannot be used to verify cycle counting or frequency related to cyclic fatigue testing applications.  
1.5 Since conversion factors are not required in this practice, either SI units (mm/min), or English [in/min], can be used as the standard.  
1.6 Speed measurement values and or settings on displays/printouts of testing machine data systems-be they instantaneous, delayed, stored, or retransmitted-which are within the Classification criteria listed in Table 1, comply with Practices E2658.  
1.7 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-2015
• ICS: 19.060 - Mechanical testing
• Technical Committee: E28 - Mechanical Testing
• Drafting Committee: E28.01 - Calibration of Mechanical Testing Machines and Apparatus

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: E2658 − 15
Standard Practices for
1
Verification of Speed for Material Testing Machines
This standard is issued under the fixed designation E2658; 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 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 These practices cover procedures and requirements for
the calibration and verification of testing machine speed by E2309 Practices for Verification of Displacement Measuring
Systems and Devices Used in Material Testing Machines
means of standard calibration devices. This practice is not
intended to be complete purchase specifications for testing
3. Terminology
machines.
3.1 Definitions:
1.2 These practices apply to the verification of the speed
3.1.1 percent error, n—in the case of a speed measuring
application and measuring systems associated with the testing
system, the ratio, expressed as a percent, of the error to the
machine, such as a scale, dial, marked or unmarked recorder
reference value of the applied speed.
chart, digital display, setting, etc. In all cases the buyer/owner/
3.1.1.1 Discussion—The speed, as measured by the testing
user must designate the speed-measuring system(s) to be
machine, and the speed, as computed from the readings of the
verified.
calibration devices, shall be recorded at each verified speed.
1.3 These practices give guidance, recommendations, and
The percent error, shall be calculated from this data as follows:
examples, specific to electro-mechanical testing machines. The
Percent Error5 @~TMsp2 Refsp!/Refsp# × 100 (1)
practice may also be used to verify actuator speed for hydraulic
where:
testing machines.
TMsp = speed measured by the machine being verified,
1.4 This standard cannot be used to verify cycle counting or
mm/min [in/min], and
frequency related to cyclic fatigue testing applications.
Refsp = reference value of the measured speed, mm/min
1.5 Since conversion factors are not required in this
[in/min], as determined by the calibration device.
practice, either SI units (mm/min), or English [in/min], can be
Not all testing machines have available indicated speed
used as the standard.
values. In such cases, the verification of the testing ma-
1.6 Speed measurement values and or settings on displays/
chine’s speed setting is applicable. The percent error for the
printouts of testing machine data systems-be they
testing machine speed settings, shall be calculated as fol-
instantaneous, delayed, stored, or retransmitted-which are
lows:
within the Classification criteria listed in Table 1, comply with
Percent Error5 TMsps2 Refsp /Refsp × 100 (2)
@~ ! #
Practices E2658.
where:
1.7 This standard does not purport to address all of the
TMsps = testing machine speed setting, mm/min (in/min),
safety concerns, if any, associated with its use. It is the
and
responsibility of the user of this standard to establish appro-
Refsp = reference value of the measured speed, mm/min
priate safety and health practices and determine the applica-
(in/min), as determined by the calibration device.
bility of regulatory limitations prior to use.
3.1.2 ramp-to-speed condition, n—during a speed verifica-
tion run, it is the time and or change in displacement required
to achieve a constant speed condition.
1
These practices are under the jurisdiction of ASTM Committee E28 on
Mechanical Testing and is the direct responsibility of Subcommittee E28.01 on
2
Calibration of Mechanical Testing Machines and Apparatus. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2015. Published August 2015. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2011. Last previous edition approved in 2011 as E2658–11. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E2658–15. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E2658 − 15
know if the test speed has been reached or is repeatable from test to test.
3.1.3 reference standards, n—devices used to verify either
the speed of a testing machine or the speed indicated by a
5. Calibration Devices
testing machine.
5.1 Reference standards used for verification of speed
3.1.4 speed measuring system, n—a device or set of devices
measuring systems shall have estimated measurement uncer-
comprising of a speed transducer and associated instrumenta-
tainties. The measurement uncertainty of verification results,
tion or a
...

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: E2658 − 11 E2658 − 15
Standard Practices for
1
Verification of Speed for Material Testing Machines
This standard is issued under the fixed designation E2658; 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
1.1 These practices cover procedures and requirements for the calibration and verification of testing machine speed by means
of standard calibration devices. This practice is not intended to be complete purchase specifications for testing machines.
1.2 These practices apply to the verification of the speed application and measuring systems associated with the testing machine,
such as a scale, dial, marked or unmarked recorder chart, digital display, setting, etc. In all cases the buyer/owner/user must
designate the speed-measuring system(s) to be verified.
1.3 These practices give guidance, recommendations, and examples, specific to electro-mechanical testing machines. The
practice may also be used to verify actuator speed for hydraulic testing machines.
1.4 This standard cannot be used to verify cycle counting or frequency related to cyclic fatigue testing applications.
1.5 Since conversion factors are not required in this practice, either SI units (mm/min), or English [in/min], can be used as the
standard.
1.6 Speed measurement values and or settings on displays/printouts of testing machine data systems-be they instantaneous,
delayed, stored, or retransmitted-which are within the Classification criteria listed in Table 1, comply with Practices E2658.
1.7 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:
E2309 Practices for Verification of Displacement Measuring Systems and Devices Used in Material Testing Machines
3. Terminology
3.1 Definitions:
3.1.1 percent error,,error, n—in the case of a speed measuring system, the ratio, expressed as a percent, of the error to the
reference value of the applied speed.
1
These practices are 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 Feb. 1, 2011May 1, 2015. Published February 2011August 2015. Originally approved in 2011. Last previous edition approved in 2011 as
E2658–11. DOI: 10.1520/E2658–11.10.1520/E2658–15.
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.
3.1.1.1 Discussion—
The speed, as measured by the testing machine, and the speed, as computed from the readings of the calibration devices, shall be
recorded at each verified speed. The percent error, shall be calculated from this data as follows:
Percent Error 5 @~TMsp 2 Refsp!/Refsp# 3100 (1)
where:
where:
TMsp = speed measured by the machine being verified, mm/min [in/min], and
Refsp = reference value of the measured speed, mm/min [in/min], as determined by the calibration device.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E2658 − 15
Not all testing machines have available indicated speed values. In such cases, the verification of the testing machine’s speed
setting is applicable. The percent error for the testing machine speed settings, shall be calculated as follows:
Percent Error 5 TMsps 2 Refsp /Refsp 3100 (2)
@~ ! #
where:
where:
TMsps = testing machine speed setting, mm/min (in/min), and
Refsp = reference value of the measured speed, mm/min (in/min), as determined by the calibration device.
3.1.2 ramp-to-speed condition, n—during a speed verification run, it is the time and or change in displacement required to
achieve a constant speed condition.
3.1.3 reference standards, n—devices used to verify either the speed of a testing machine or the speed indicated by a testing
machine.
3.1.4 speed measuring system, n—a device or set of devices comprising of a
...