ASTM D7013-04
(Guide)Standard Guide for Nuclear Surface Moisture and Density Gauge Calibration Facility Setup
Standard Guide for Nuclear Surface Moisture and Density Gauge Calibration Facility Setup
SIGNIFICANCE AND USE
Gauge calibration is conducted for the following purposes:
5.1.1 To ensure gauge measurement repeatability between gauges
5.1.2 To correct for electronic and mechanical changes over time
5.1.3 To adjust readings after major service to the gauge
To establish a proper calibration area for gauges
To reduce the chance of improper calibration
Note 1—The quality of the results produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of practice D 3740 are generally considered capable of competent and objective testing/inspection/etc. Users of this standard are cautioned that compliance with practice D 3740 does not in itself assure a means of evaluating some of those factors.
SCOPE
1.1 This guide outlines procedures for setup of nuclear moisture density gauge in shielded, Method A, and unshielded, Method B, configurations.
1.2 This guide does not attempt to describe the calibration techniques or methods. It is assumed that this guide will be used by persons familiar with the operations of the gauge and in performing proper calibration, service and maintenance.
1.3 This guide does not attempt to address maintenance or service procedures related to the gauge.
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.
1.4 This guide offers an organized collection of information or a series of options and does not recommend a 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 projects many unique aspects. The word "Standard" in the title of this document has been approved through ASTM consensus process.
1.5 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in practice D 6026.
1.5.1 The method used to specify how data are collected, calculated, or recorded in this standard is not directly related to the accuracy to which the data can be applied in the design or other uses, or both. How one applies the results obtained using this standard is beyond its scope.
General Information
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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: D7013 – 04
Standard Guide for
Nuclear Surface Moisture and Density Gauge Calibration
Facility Setup
This standard is issued under the fixed designation D7013; 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
1.1 This guide outlines procedures for setup of nuclear 2.1 ASTM Standards:
moisture density gauge in shielded, MethodA, and unshielded, D2922 TestMethodsforDensityofSoilandSoil-Aggregate
Method B, configurations. in Place by Nuclear Methods (Shallow Depth)
1.2 This guide does not attempt to describe the calibration D653 Terminology Relating to Soil, Rock, and Contained
techniques or methods. It is assumed that this guide will be Fluids
used by persons familiar with the operations of the gauge and D3740 Practice for Minimum Requirements for Agencies
in performing proper calibration, service and maintenance. Engaged in Testing and/or Inspection of Soil and Rock as
1.3 This guide does not attempt to address maintenance or Used in Engineering Design and Construction
service procedures related to the gauge. D6026 PracticeforUsingSignificantDigitsinGeotechnical
1.4 This guide does not purport to address all of the safety Data
concerns, if any, associated with its use. It is the responsibility
3. Terminology
of the user of this guide to establish appropriate safety, and
health practices and determine the applicability of regulatory 3.1 For common definitions of terms refer to Terminology
D653
limitations prior to use.
1.5 This guide offers an organized collection of information 3.2 Definitions of Terms Specific to This Standard:
3.2.1 Unshielded Calibration bay—An open area within a
or a series of options and does not recommend a specific
course of action. This document cannot replace education or calibration facility where the closest wall is a minimum of 1
meter (3 ft.) from the spot in which the gauge is being
experience and should be used in conjunction with professional
calibrated.
judgment. Not all aspects of this guide may be applicable in all
circumstances. This ASTM standard is not intended to repre- 3.2.2 Shielded Calibration bay—An enclosed area sur-
rounded by concrete blocks or walls to protect the gauge being
sent or replace the standard of care by which the adequacy of
a given professional service must be judged, nor should this calibrated from outside influence and background radiation
from all gauges in the facility.
document be applied without consideration of a project’s many
unique aspects. The word “Standard” in the title of this 3.2.3 Shielded Storage Bay—An enclosed area shielded by
walls to maintain and control radiation background in the
document has been approved through ASTM consensus pro-
cess. facility and to reduce influences from stored gauges.
1.6 All observed and calculated values shall conform to the
4. Summary of Method
guidelines for significant digits and rounding established in
4.1 Nuclear moisture density gauges require proper calibra-
practice D6026.
tion to ensure measurement repeatability between gauges.
1.6.1 The method used to specify how data are collected,
Since these gauges contain radioactive isotopes, influences
calculated, or recorded in this standard is not directly related
from the surroundings and other gauges should be controlled
to the accuracy to which the data can be applied in the design
during the calibration process. This guide provides procedures
or other uses, or both. How one applies the results obtained
to facilities involved in calibration of one or more gauges in
using this standard is beyond its scope.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
This guide is under the jurisdiction ofASTM Committee D18 on Soil and Rock contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and is the direct responsibility of Subcommittee D18.08 on Special and Construc- Standards volume information, refer to the standard’s Document Summary page on
tion Control Tests. the ASTM website.
Current edition approved Dec. 1, 2004. Published December 2004. DOI: Withdrawn. The last approved version of this historical standard is referenced
10.1520/D7013-04. on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D7013 – 04
NOTE 3—Depending on their design, some gauges may be less suscep-
shielded and unshielded calibration bays. The goal of this
tibletowalleffect.Leadsheetsmaynotberequired,ifitisdeterminedthat
guide is to insure proper gauge calibration and to reduce
the counts inside and outside the bay are equal and that the gauge is not
influences that would result in field measurement variability
affected by the walls surrounding the calibration bay.
between gauges.
7.1.3 The calibration bay wall thickness should be a mini-
5. Significance and Use mum of 410 mm (16 inches) thick. The walls should be
constructed using high-density concrete blocks or cinder
5.1 Gauge calibration is conducted for the following pur-
blocks filled with sand or fine aggregate material. Stagger the
poses:
blocks during wall construction to block gaps and to improve
5.1.1 To ensure gauge measurement repeatability between
wall integrity.
gauges
7.1.4 The wall height should be 1.0 to 1.3 meters (40 to 50
5.1.2 To correct for electronic and mechanical changes over
inches)
time
7.1.5 Design and construct the bay such that the opening of
5.1.3 To adjust readings after major service to the gauge
the bay is not in direct line with the storage bay or the area
5.2 To establish a proper calibration area for gauges
where the gauges are serviced
5.3 To reduce the chance of improper calibration
7.1.6 Center the calibration reference block(s) in the bay
NOTE 1—The quality of the results produced by this standard is
7.1.7 Once the bays are complete and the calibration blocks
dependent on the competence of the personnel performing it, and the
are setup, follow the procedures in section 9 and make
suitability of the equipment and facilities used. Agencies that meet the
adjustments, if necessary.
criteria of practice D3740 are generally considered capable of competent
and objective testing/inspection/etc. Users of this standard are cautioned
7.2 Configuration of a Shielded Bay
that compliance with practice D3740 does not in itself assure a means of
7.2.1 Wall Influence Verification for Shielded Calibration
evaluating some of those factors.
Bay(s)—The response to the surrounding walls can vary
significantly for different gauge geometries. For accurate
6. Apparatus
calibration, influence from the walls should be eliminated.
6.1 Calibrationreferenceblock(s)aspertherequirementsof
7.2.1.1 Place a gauge on a calibration reference block
ASTM D2922 with density certification from the block manu-
7.2.1.2 Take two four minute counts, moisture and density,
facturer
in Backscatter and 300 mm (12 inch) position and one four
6.2 High density concrete blocks 9cm 3 20 cm 3 41 cm
minute counts at all other gauge depths.
(3.59 3 89 3 169) or cinder blocks 20 cm 3 20 cm 3 41 cm
7.2.1.3 Move the calibration reference block(s) out of the
(89 3 89 3 169) filled with sand or other fine aggregate
bay, a minimum of 1 meter (3 ft) from any walls and 10 meter
materials for construction of bay walls
(33 ft) from any gauges.
6.3 Lead sheet 1 to 6 mm (0.032 to 0.25 inches) thick for
7.2.1.4 Repeat step 7.2.1.2 with the same gauge
lining the bay walls. The exposed surfaces containing lead
7.2.1.5 The difference between the counts in step 7.2.1.2
should be painted or covered
and 7.2.1.4 for all gauge depths should be less than 61.0 %.
6.4 Plywood of minimum 1.3 cm (0.59) thickness for
Determine the difference by equation Eq 1 and record to 0.1 %
securing lead sheets to the calibration bay walls.
7. Method A: Shielded Calibration Bay Setup
Largest Count 2 Smallest Count
%Difference 5 3 100 (1)
S D
Largest Count
7.1 Set up a shielded calibration bay if more than one gauge
isgoingtobecalibratedsimultaneously,andthespacebetween
7.2.1.6 If the difference in the counts are higher than the 6
gauges being calibrated is less than 10 meter (33 ft). If the
1.0 % limit, increase the inside wall dimensions or the lead
gauge in storage bay is less than 7 meters (23 ft) from the area
liner thickness and repeat the steps in 7.2.1.1-7.2.1.5.
wherethecalibrationisgoingtotakeplace,oriftheareawhere
7.2.1.7 Repeat this procedure for all model gauges.
gaugesareroutinelyservicedislessthan10meters(33ft)from
7.2.2 Reference Standard Count Verification in Shielded
the calibration area. Refer to theAppendix X1 f
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