ASTM D6027/D6027M-24
(Practice)Standard Practice for Calibration/Verification of Linear Displacement Transducers for Geotechnical Purposes
Standard Practice for Calibration/Verification of Linear Displacement Transducers for Geotechnical Purposes
SIGNIFICANCE AND USE
5.1 The displacement transducer plays an important role in geotechnical applications to measure change in dimensions of specimens.
5.2 The displacement transducer must be calibrated/verified for use in the laboratory to ensure reliable conversions of the sensor's electrical output to engineering units.
5.3 The displacement transducer should be calibrated/verified before initial use, at least annually thereafter, after any change in the electronic configuration that employs the sensor, after any significant change in test conditions using the transducer that differ from conditions during the last calibration/verification, and after any physical action on the transducer that might affect its response.
5.4 Displacement transducer generally has a working range within which voltage output is linearly proportional to displacement of the transducer. This procedure is applicable to the linear range of the transducer. Recommended practice is to use the displacement transducer only within its linear working range.
Note 1: Verification as in Practices E2309/E2309M should not be confused with calibration
SCOPE
1.1 This practice outlines the procedure for calibration/verification of displacement transducers and their readout systems for geotechnical purposes. It covers any transducer used to measure displacement, which gives an electrical output that is linearly proportional to displacement. This includes linear variable displacement transducers (LVDTs), linear displacement transducers (LDTs) and linear strain transducers (LSTs).
1.2 This calibration/verification procedure is used to determine the relationship between output of the transducer and its readout system and change in length. This relationship is used to convert readings from the transducer readout system into engineering units.
1.3 This calibration/verification procedure also is used to determine the accuracy of the transducer and its readout system over the range of its use to compare with the manufacturer’s specifications for the instrument and the suitability of the instrument for a specific application.
1.4 Units—The values stated in either SI units or inch-pound units given in brackets are to be regarded separately as the standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combination values from the two systems may result in non-conformance with standard.
1.5 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026 unless superseded by this standard.
1.5.1 The procedures used to specify how data are collected, recorded or calculated in this standard are regarded as the industry standard. In addition they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any consideration for the user’s objectives; it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design.
1.6 This practice offers a set of instructions for performing one or more specific operations. This standard cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project’s many unique aspects. The word “standard” in the title of this document means only that the document has been approved through the ASTM consensus process.
1.7 This standa...
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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: D6027/D6027M − 24
Standard Practice for
Calibration/Verification of Linear Displacement Transducers
1
for Geotechnical Purposes
This standard is issued under the fixed designation D6027/D6027M; 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* ation for the user’s objectives; it is common practice to
increase or reduce significant digits of reported data to be
1.1 This practice outlines the procedure for calibration/
commensurate with these considerations. It is beyond the scope
verification of displacement transducers and their readout
of this standard to consider significant digits used in analytical
systems for geotechnical purposes. It covers any transducer
methods for engineering design.
used to measure displacement, which gives an electrical output
that is linearly proportional to displacement. This includes 1.6 This practice offers a set of instructions for performing
linear variable displacement transducers (LVDTs), linear dis- one or more specific operations. This standard cannot replace
placement transducers (LDTs) and linear strain transducers education or experience and should be used in conjunction with
(LSTs). professional judgment. Not all aspects of this practice may be
applicable in all circumstances. This ASTM standard is not
1.2 This calibration/verification procedure is used to deter-
intended to represent or replace the standard of care by which
mine the relationship between output of the transducer and its
the adequacy of a given professional service must be judged,
readout system and change in length. This relationship is used
nor should this document be applied without consideration of
to convert readings from the transducer readout system into
a project’s many unique aspects. The word “standard” in the
engineering units.
title of this document means only that the document has been
1.3 This calibration/verification procedure also is used to
approved through the ASTM consensus process.
determine the accuracy of the transducer and its readout system
1.7 This standard does not purport to address all of the
over the range of its use to compare with the manufacturer’s
safety concerns, if any, associated with its use. It is the
specifications for the instrument and the suitability of the
responsibility of the user of this standard to establish appro-
instrument for a specific application.
priate safety, health, and environmental practices and deter-
1.4 Units—The values stated in either SI units or inch-
mine the applicability of regulatory limitations prior to use.
pound units given in brackets are to be regarded separately as
1.8 This international standard was developed in accor-
the standard. The values stated in each system may not be exact
dance with internationally recognized principles on standard-
equivalents; therefore, each system shall be used independently
ization established in the Decision on Principles for the
of the other. Combination values from the two systems may
Development of International Standards, Guides and Recom-
result in non-conformance with standard.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.5 All observed and calculated values shall conform to the
guidelines for significant digits and rounding established in
2. Referenced Documents
Practice D6026 unless superseded by this standard.
2
1.5.1 The procedures used to specify how data are collected,
2.1 ASTM Standards:
recorded or calculated in this standard are regarded as the D653 Terminology Relating to Soil, Rock, and Contained
industry standard. In addition they are representative of the
Fluids
significant digits that generally should be retained. The proce- D3740 Practice for Minimum Requirements for Agencies
dures used do not consider material variation, purpose for
Engaged in Testing and/or Inspection of Soil and Rock as
obtaining the data, special purpose studies, or any consider- Used in Engineering Design and Construction
D6026 Practice for Using Significant Digits and Data Re-
cords in Geotechnical Data
1
This practice is under the jurisdiction of ASTM Committee D18 on Soil and
Rock and is the direct responsibility of Subcommittee D18.95 on Information
2
Retrieval and Data Automation. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Jan. 1, 2024. Published January 2024. Originally contact ASTM Customer Service at service@astm.org.
...
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: D6027/D6027M − 15 D6027/D6027M − 24
Standard Practice for
Calibrating Calibration/Verification of Linear Displacement
1
Transducers for Geotechnical Purposes
This standard is issued under the fixed designation D6027/D6027M; 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 This practice outlines the procedure for calibrating calibration/verification of displacement transducers and their readout
systems for geotechnical purposes. It covers any transducer used to measure displacement, which gives an electrical output that
is linearly proportional to displacement. This includes linear variable displacement transducers (LVDTs), linear displacement
transducers (LDTs) and linear strain transducers (LSTs).
1.2 This calibrationcalibration/verification procedure is used to determine the relationship between output of the transducer and
its readout system and change in length. This relationship is used to convert readings from the transducer readout system into
engineering units.
1.3 This calibrationcalibration/verification procedure also is used to determine the accuracy of the transducer and its readout
system over the range of its use to compare with the manufacturer’s specifications for the instrument and the suitability of the
instrument for a specific application.
1.4 Units—The values stated in either SI units or inch-pound units given in brackets are to be regarded separately as the standard.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
Combination values from the two systems may resultsresult in non-conformance with standard.
1.5 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice
D6026 unless superseded by this standard.
1.5.1 The procedures used to specify how data are collected, recorded or calculated in this standard are regarded as the industry
standard. In addition they are representative of the significant digits that generally should be retained. The procedures used do not
consider material variation, purpose for obtaining the data, special purpose studies, or any consideration for the user’s objectives;
it is common practice to increase or reduce significant digits of reported data to be commensurate with these consideration.con-
siderations. It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design.
1.6 This practice offers a set of instructions for performing one or more specific operations. This standard cannot replace education
or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in
all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a
1
This practice is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.95 on Information Retrieval and
Data Automation.
Current edition approved July 1, 2015Jan. 1, 2024. Published July 2015January 2024. Originally approved in 1996. Last previous edition approved in 2004 as
D6027–96(2004), which was withdrawn February 2013 and reinstated in July 2015. DOI: 10.1520/D6027_D6027M-15.2015 as D6027-15. DOI: 10.1520/D6027_D6027M-
24.
*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
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D6027/D6027M − 24
given professional service must be judged, nor should this document be applied without consideration of a project’s many unique
aspects. The word “standard” in the title of this document means only that the document has been approved through the ASTM
consensus process.
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 healthsafety, health, and environmental practices and determine
the applicability of regulatory limitations prior to use.
1.8 This international standard was developed in accordance with internationally recogni
...
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