ASTM D7759/D7759M-21
(Guide)Standard Guide for Nuclear Surface Moisture and Density Gauge Calibration
Standard Guide for Nuclear Surface Moisture and Density Gauge Calibration
SIGNIFICANCE AND USE
5.1 Gauge calibration is performed for the following purposes:
5.1.1 When necessary, to compute the calibration constants of a density calibration equation that relates the gauge density system response (the “density count”) to the soil-equivalent density of the standard on which this response is elicited.
5.1.2 When necessary, to compute the calibration constants of a water content calibration equation that relates the gauge water content system response (the “water content count”) to the water mass per unit volume value of the standard on which this response is elicited.
5.1.3 To establish the relationship between the density measured by the gauge to the soil-equivalent density of the standard on which this response is elicited.
5.1.4 To establish the relationship between the water mass per unit volume measured by the gauge to the water mass per unit volume of the standard on which this response is elicited.
5.1.5 To ensure that the gauge has an in-place density gauge precision level that is consistent with typical gauge response.
5.1.6 To ensure that the gauge has an in-place water mass per unit volume gauge precision level that is consistent with typical gauge response.
5.2 Gauge verification is performed for the following purposes:
5.2.1 To indicate to the party or agency performing the verification when the mathematical relationship between the in-place density reading indicated by the gauge and the corresponding gauge density test count needs to be adjusted so that the gauge measurement errors do not exceed the specified absolute maximum measurement error for the calibration method used.
5.2.2 To indicate to the party or agency performing the verification when the mathematical relationship between the water mass per unit volume indicated by the gauge and the corresponding gauge water content test count needs to be adjusted so that the gauge measurement errors do not exceed the specified absolute maximum measurement error for the cal...
SCOPE
1.1 Procedure A—This guide describes the process and objective of formulating the mathematical relationship between the density system count of a nuclear surface moisture and density gauge and the corresponding wet density value of the density standard upon which the density system response was observed.
1.2 Procedure B—This guide describes the process and objective of comparing the wet density measured by a nuclear surface moisture and density gauge and the corresponding density value of the density standard upon which the density system response was observed.
1.3 This guide describes the process and objective of the verification of the measurements of a nuclear surface moisture and density gauge.
1.4 Procedure A—This guide describes the process and objective of formulating the mathematical relationship between the water content system count of a nuclear surface moisture and density gauge and the corresponding water mass per unit volume value of the water content standard upon which the water content system response was observed.
1.5 Procedure B—This guide describes the process and objective of comparing the water mass per unit volume measured by a nuclear surface moisture and density gauge and the corresponding water mass per unit volume of the corresponding water content standard upon which the water content system response was observed.
1.6 This guide describes the process and objective of the verification of the measurements of a nuclear surface moisture and density gauge.
1.7 This guide describes two mathematical processes by which the gauge measurement precision may be computed or measured.
1.8 This guide offers guidance for developing and reporting estimates of uncertainties in measurements made with gauges that have undergone calibration and verification.
1.9 All observed and calculated values shall conform to the guide for significant digits and rounding established in Practice D6026.
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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: D7759/D7759M − 21
Standard Guide for
1
Nuclear Surface Moisture and Density Gauge Calibration
This standard is issued under the fixed designation D7759/D7759M; 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* 1.7 This guide describes two mathematical processes by
which the gauge measurement precision may be computed or
1.1 Procedure A—This guide describes the process and
measured.
objectiveofformulatingthemathematicalrelationshipbetween
the density system count of a nuclear surface moisture and
1.8 This guide offers guidance for developing and reporting
density gauge and the corresponding wet density value of the
estimates of uncertainties in measurements made with gauges
density standard upon which the density system response was
that have undergone calibration and verification.
observed.
1.9 All observed and calculated values shall conform to the
1.2 Procedure B—This guide describes the process and
guide for significant digits and rounding established in Practice
objective of comparing the wet density measured by a nuclear
D6026.
surface moisture and density gauge and the corresponding
1.10 Units—The values stated in either SI units or inch-
density value of the density standard upon which the density
pound units are to be regarded separately as standard. The
system response was observed.
values stated in each system are not necessarily exact equiva-
1.3 This guide describes the process and objective of the
lents; therefore, to ensure conformance with the standard, each
verification of the measurements of a nuclear surface moisture
system shall be used independently of the other, and values
and density gauge.
from the two systems shall not be combined.Within the text of
1.4 Procedure A—This guide describes the process and
this standard, SI units appear first followed by the inch-pound
objectiveofformulatingthemathematicalrelationshipbetween
(or other non-SI) units in brackets.
the water content system count of a nuclear surface moisture
1.10.1 Reporting of test results in units other than SI shall
and density gauge and the corresponding water mass per unit
not be regarded as nonconformance with this guide.
volume value of the water content standard upon which the
1.11 This standard does not purport to address all of the
water content system response was observed.
safety concerns, if any, associated with its use. It is the
1.5 Procedure B—This guide describes the process and
responsibility of the user of this standard to establish appro-
objective of comparing the water mass per unit volume
priate safety, health, and environmental practices and deter-
measured by a nuclear surface moisture and density gauge and
mine the applicability of regulatory limitations prior to use.
the corresponding water mass per unit volume of the corre-
1.12 This guide offers an organized collection of informa-
sponding water content standard upon which the water content
tion or a series of options and does not recommend specific
system response was observed.
course of action. This document cannot replace education or
1.6 This guide describes the process and objective of the
experienceandshouldbeusedinconjunctionwithprofessional
verification of the measurements of a nuclear surface moisture
judgment. Not all aspects of this guide may be applicable in all
and density gauge.
circumstances. This ASTM standard is not intended to repre-
sent or replace the standard of care by which the adequacy of
1
a given professional service must be judged, nor should this
This practice is under the jurisdiction of ASTM Committee D18 on Soil and
Rock and is the direct responsibility of Subcommittee D18.08 on Special and
document be applied without consideration of a project’s many
Construction Control Tests.
unique aspects. The word “Standard” in the title of this
Current edition approved May 1, 2021. Published June 2021. Originally
document means only that the document has been approved
approved in 2012. Last previous edition approved in 2014 as D7759–14. DOI:
through the ASTM consensus process.
10.1520/D7759-21.
*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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D7759/D7759M − 21
1.13 This international standard was developed in accor- 3.2.5 prepared standards, n—density or water
...
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: D7759/D7759M − 14 D7759/D7759M − 21
Standard Guide for
1
Nuclear Surface Moisture and Density Gauge Calibration
This standard is issued under the fixed designation D7759/D7759M; 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 Procedure A—This guide describes the process and objective of formulating the mathematical relationship between the density
system count of a nuclear surface moisture and density gauge and the corresponding wet density value of the density standard upon
which the density system response was observed.
1.2 Procedure B—This guide describes the process and objective of calibratingcomparing the wet density system ofmeasured by
a nuclear surface moisture and density gauge, or formulating the mathematical relationship between the density system response
(the “density count”) of a nuclear surface moisture and density gauge and the corresponding density value of the density standard
upon which the density system response was observed.
1.3 This guide describes the process and objective of the verification of the measurements of a nuclear surface moisture and
density gauge.
1.4 Procedure A—This guide describes the process and objective of calibrating the water content system of a nuclear surface
moisture and density gauge, or formulating the mathematical relationship between the water content system response (the “water
content count”) count of a nuclear surface moisture and density gauge and the corresponding water mass per unit volume value
of the water content standard upon which the water content system response was observed.
1.5 Procedure B—This guide describes the process and objective of verifying the density system of comparing the water mass per
unit volume measured by a nuclear surface moisture and density gauge.gauge and the corresponding water mass per unit volume
of the corresponding water content standard upon which the water content system response was observed.
1.6 This guide describes the process and objective of verifying the water content system of the verification of the measurements
of a nuclear surface moisture and density gauge.
1.7 This guide describes two mathematical processes by which the gauge measurement precision may be computed or measured.
1.8 This guide offers guidance for developing and reporting estimates of uncertainties in measurements made with gauges that
have undergone calibration orand verification.
1.9 All observed and calculated values shall confirmconform to the guide for significant digits and rounding established in Practice
D6026.
1
This practice is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.08 on Special and Construction
Control Tests.
Current edition approved June 1, 2014May 1, 2021. Published July 2014June 2021. Originally approved in 2012. Last previous edition approved in 20122014 as
D7759–12a.–14. DOI: 10.1520/D7759-14.10.1520/D7759-21.
*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
---------------------- Page: 1 ----------------------
D7759/D7759M − 21
1.10 Units—The values stated in either SI units or inch pound inch-pound units are to be regarded separately as standard. The
values stated in each system mayare not benecessarily exact equivalents; therefore, to ensure conformance with the standard, each
system shall be used independently of the other. Combiningother, and values from the two systems may result in non-conformance
with the standard.shall not be combined. Within the text of this standard, SI units appear first followed by the inch-pound (or other
non-SI) units in brackets.
1.10.1 Reporting of test results in units other than SI shall not be regarded as nonconformance with this guide.
1.11 This guidestandard 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 guidestandard to establish appropriate safety safety, health, and healthenvironmental practices and
determine the applicability of regulatory limitations prior to use.
1.12 This guide offers an organized collection of information or a series of options and does not recommend specific c
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