ASTM D7759-12a
(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 To formulate a mathematical equation, or 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 To formulate a mathematical equation, or 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 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 calibration meets the required level of measurement uncertainty.
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 calibration meets the required level of measurement uncertainty.
5.2.3 Gauge verification and calibration require specialized training and equipment. Gauge calibration and verification should only be conducted by those trained in the proper operation of the gauge, the calibration or verification standards, and any tables, charts, graphs, or computer programs required for the proper execution of these operations.
SCOPE
1.1 This guide describes the process and objective of calibrating the density system of 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.
1.2 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”) 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.
1.3 This guide describes the process and objective of verifying the density system of a nuclear surface moisture and density gauge.
1.4 This guide describes the process and objective of verifying the water content system of a nuclear surface moisture and density gauge.
1.5 This guide describes two mathematical processes by which the gauge measurement precision may be computed or measured.
1.6 This guide offers guidance for developing and reporting estimates of uncertainties in measurements made with gauges that have undergone calibration or verification.
1.7 All observed and calculated values shall confirm to the guide for significant digits and rounding established in Practice D6026.
1.8 This guide 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 guide to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.9 This guide offers an organized collection of information or a series of options and does not recommend specific course of action. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This ASTM standard is not inte...
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Designation: D7759 − 12a
StandardGuide for
1
Nuclear Surface Moisture and Density Gauge Calibration
This standard is issued under the fixed designation D7759; 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* health practices and determine the applicability of regulatory
limitations prior to use.
1.1 This guide describes the process and objective of
1.9 This guide offers an organized collection of information
calibratingthedensitysystemofanuclearsurfacemoistureand
or a series of options and does not recommend specific course
density gauge, or formulating the mathematical relationship
of action. This document cannot replace education or experi-
between the density system response (the “density count”) of a
ence and should be used in conjunction with professional
nuclear surface moisture and density gauge and the corre-
judgment. Not all aspects of this guide may be applicable in all
sponding density value of the density standard upon which the
circumstances. This ASTM standard is not intended to repre-
density system response was observed.
sent or replace the standard of care by which the adequacy of
1.2 This guide describes the process and objective of
a given professional service must be judged, nor should this
calibrating the water content system of a nuclear surface
document be applied without consideration of a project’s many
moisture and density gauge, or formulating the mathematical
unique aspects. The word “Standard” in the title of this
relationship between the water content system response (the
document means only that the document has been approved
“water content count”) of a nuclear surface moisture and
through the ASTM consensus process.
density gauge and the corresponding water mass per unit
volume value of the water content standard upon which the
2. Referenced Documents
water content system response was observed.
2
2.1 ASTM Standards:
1.3 This guide describes the process and objective of
D653 Terminology Relating to Soil, Rock, and Contained
verifying the density system of a nuclear surface moisture and
Fluids
density gauge. D2216 Test Methods for Laboratory Determination of Water
(Moisture) Content of Soil and Rock by Mass
1.4 This guide describes the process and objective of
D6026 Practice for Using Significant Digits in Geotechnical
verifying the water content system of a nuclear surface
Data
moisture and density gauge.
D6938 Test Method for In-Place Density and Water Content
1.5 This guide describes two mathematical processes by
of Soil and Soil-Aggregate by Nuclear Methods (Shallow
which the gauge measurement precision may be computed or
Depth)
measured.
D7013 Guide for Nuclear Surface Moisture and Density
Gauge Calibration Facility Setup
1.6 This guide offers guidance for developing and reporting
estimates of uncertainties in measurements made with gauges
3. Terminology
that have undergone calibration or verification.
3.1 Definitions—See Terminology D653 for general defini-
1.7 All observed and calculated values shall confirm to the
tions.
guide for significant digits and rounding established in Practice
D6026. 3.2 Definitions of Terms Specific to This Standard:
3
3.2.1 coverage factor , n—a number larger than one by
1.8 This guide does not purport to address all of the safety
which a combined standard measurement uncertainty is mul-
concerns, if any, associated with its use. It is the responsibility
tiplied to obtain an expanded measurement uncertainty.
of the user of this guide to establish appropriate safety and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This practice is under the jurisdiction of ASTM Committee D18 on Soil and contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Rock and is the direct responsibility of Subcommittee D18.08 on Special and Standards volume information, refer to the standard’s Document Summary page on
Construction Control Tests. the ASTM website.
3
Current edition approved Nov. 1, 2012. Published December 2012. Originally JCGM 200:2008: International Vocabulary of Metrology—Basic and General
approved in 2012. Last previous edition approved in 2012 as D7759–12. DOI: Concepts and Associated Terms (VIM). 2008: Joint Document Committee for
10.1520/D7759-12a. Guides in Metrology.
*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 − 12a
3 3
3.2.2 definitional uncertainty , n—the component of mea- 3.2.16 Ty
...
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 − 12 D7759 − 12a
Standard Guide for
1
Nuclear Surface Moisture and Density Gauge Calibration
This standard is issued under the fixed designation D7759; 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 This guide describes the process and objective of calibrating the density system of 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.
1.2 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”)
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.
1.3 This guide describes the process and objective of verifying the density system of a nuclear surface moisture and density
gauge.
1.4 This guide describes the process and objective of verifying the water content system of a nuclear surface moisture and
density gauge.
1.5 This guide describes two mathematical processes by which the gauge measurement precision may be computed or
measured.
1.6 This guide offers guidance for developing and reporting estimates of uncertainties in measurements made with gauges that
have undergone calibration or verification.
1.7 All observed and calculated values shall confirm to the guide for significant digits and rounding established in Practice
D6026.
1.8 This guide 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 guide to establish appropriate safety and health practices and determine the applicability of regulatory limitations
prior to use.
1.9 This guide offers an organized collection of information or a series of options and does not recommend specific course of
action. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not
all aspects of this guide 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D2216 Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
D6026 Practice for Using Significant Digits in Geotechnical Data
D6938 Test Method for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)
D7013 Guide for Nuclear Surface Moisture and Density Gauge Calibration Facility Setup
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 Feb. 1, 2012Nov. 1, 2012. Published March 2012December 2012. Originally approved in 2012. Last previous edition approved in 2012 as
D7759–12. DOI: 10.1520/D7759-12.10.1520/D7759-12a.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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
---------------------- Page: 1 ----------------------
D7759 − 12a
3. Terminology
3.1 Definitions—See Terminology D653 for general definitions.
3.2 Definitions of Terms Specific to This Standard:
3
3.2.1 coverage factor , n—a number larger than one by which a com
...
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