ASTM E2649-12
(Test Method)Standard Test Method for Determining Argon Concentration in Sealed Insulating Glass Units Using Spark Emission Spectroscopy
Standard Test Method for Determining Argon Concentration in Sealed Insulating Glass Units Using Spark Emission Spectroscopy
SIGNIFICANCE AND USE
This test method is intended to provide a means for determining the concentration of argon in sealed insulating glass units under controlled conditions in compliance with the apparatus manufacturer's instructions.
This is a non-destructive test method in that the edge seal of the test specimen is not breached in order to determine the argon gas concentration. However, damage to some glass coatings on the inner surfaces of the glass can occur.
This test method has been developed based on data collected in a controlled laboratory environment.
The device shall be used to determine the argon gas concentration in insulating glass units in a controlled laboratory environment. Refer to 12.3.
This test method may be used to determine the argon gas concentration before, during, or after the insulating glass unit is subjected to durability tests.
The accuracy of the test method is dependent upon the accuracy of the Spark Emission Spectroscope. When the concentration of the argon being measured is below certain levels, this test method is not applicable. See the spectroscope manufacturer’s literature for recommended levels of accuracy of a given model.
SCOPE
1.1 This test method covers procedures for using a spark emission spectroscope to determine the concentration of argon gas in the space between the lites of a sealed insulating glass unit.
1.2 This is a non-destructive test method.
1.3 This test method shall be used only in a controlled laboratory environment.
1.4 This test method is applicable for insulating glass units where argon has been added to the sealed insulating glass cavity and the balance of the gas is atmospheric air.
1.5 This test method is applicable for clear, double-glazed insulating glass units.
1.6 This test method is applicable for double-glazed insulating glass units with one lite having a metallic coating or tinted glass, or both, and with clear glass as the other lite.
1.7 This test method is applicable for triple-glazed insulating glass units only when the center lite of glass has a metallic coating (either low emissivity (low E) or reflective) and both of the other lites are clear glass.
1.8 This test method also includes a procedure for verifying the accuracy of the readings of the test apparatus.
1.9 The values stated in SI units are to be regarded as the standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
1.10 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. For specific warning statements, refer to 7.1.
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Designation: E2649 − 12
Standard Test Method for
Determining Argon Concentration in Sealed Insulating Glass
1
Units Using Spark Emission Spectroscopy
This standard is issued under the fixed designation E2649; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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 This test method covers procedures for using a spark
emission spectroscope to determine the concentration of argon C162Terminology of Glass and Glass Products
C717Terminology of Building Seals and Sealants
gas in the space between the lites of a sealed insulating glass
unit. E631Terminology of Building Constructions
E177Practice for Use of the Terms Precision and Bias in
1.2 This is a non-destructive test method.
ASTM Test Methods
1.3 This test method shall be used only in a controlled
E691Practice for Conducting an Interlaboratory Study to
laboratory environment.
Determine the Precision of a Test Method
E2190Specification for Insulating Glass Unit Performance
1.4 This test method is applicable for insulating glass units
and Evaluation
where argon has been added to the sealed insulating glass
cavity and the balance of the gas is atmospheric air.
3. Terminology
1.5 This test method is applicable for clear, double-glazed
3.1 Definitions: For definitions of terms found in this test
insulating glass units.
method, refer to Terminologies C162, C717, and E631.
1.6 This test method is applicable for double-glazed insu-
3.2 Definitions of Terms Specific to This Standard:
lating glass units with one lite having a metallic coating or
3.2.1 sealed insulating glass unit—an assembled unit, com-
tinted glass, or both, and with clear glass as the other lite.
prising sealed lites of glass separated by dehydrated space(s),
normally intended for clear vision areas of buildings.
1.7 This test method is applicable for triple-glazed insulat-
ing glass units only when the center lite of glass has a metallic
4. Summary of Test Method
coating(eitherlowemissivity(lowE)orreflective)andbothof
the other lites are clear glass.
4.1 The spark emission spectroscope is placed against the
glass surface of a sealed insulating glass unit in a prescribed
1.8 This test method also includes a procedure for verifying
manner. A high voltage, at low current, is applied to the glass
the accuracy of the readings of the test apparatus.
surface. This voltage creates a spark which induces a plasma
1.9 The values stated in SI units are to be regarded as the
from the gas molecules inside the test specimen. This causes
standard. The values given in parentheses are mathematical
light emissions (photons) of characteristic wavelengths. The
conversions to inch-pound units that are provided for informa-
instrument then collects the photons and analyzes them by
tion only and are not considered standard.
spark emission spectroscopy. The resulting spectrum is com-
1.10 This standard does not purport to address all of the
paredtocalibrationdatainternaltotheinstrumenttodetermine
safety concerns, if any, associated with its use. It is the the concentration of argon inside the unit.
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific
5.1 This test method is intended to provide a means for
warning statements, refer to 7.1.
determining the concentration of argon in sealed insulating
glass units under controlled conditions in compliance with the
apparatus manufacturer’s instructions.
1
This test method is under the jurisdiction of ASTM Committee E06 on
Performance of Buildings and is the direct responsibility of Subcommittee E06.22
2
on Durability Performance of Building Constructions. For referenced ASTM standards, visit the ASTM website, www.astm.org,or
Current edition approved April 1, 2012. Published May 2012. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2009. Last previous edition approved in 2009 as E2649 – 09. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E2649-09. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E2649 − 12
5.2 This is a non-destructive test method in that the edge
seal of the test specimen is not breached in order to determine
the argon gas concentration. However, damage to some glass
coatings on the inner surfaces of the glass can occur.
5.3 T
...
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:E2649–09 Designation:E2649–12
Standard Test Method for
Determining Argon Concentration in Sealed Insulating Glass
1
Units Using Spark Emission Spectroscopy
This standard is issued under the fixed designation E2649; 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 (ϵ) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers procedures for using a spark emission spectroscope to determine the concentration of argon gas in
the space between the lites of a sealed insulating glass unit.
1.2 This is a non-destructive test method.
1.3 This test method shall be used only in a controlled laboratory environment.
1.4This test method is applicable for insulating glass units with argon concentrations of 70% or more, where the balance of the
gas is atmospheric air.
1.4 This test method is applicable for insulating glass units where argon has been added to the sealed insulating glass cavity
and the balance of the gas is atmospheric air.
1.5 This test method is applicable for clear, double-glazed insulating glass units.
1.6 This test method is applicable for double-glazed insulating glass units with one lite having a metallic coating or tinted glass,
or both, and with clear glass as the other lite.
1.7 This test method is applicable for triple-glazed insulating glass units only when the center lite of glass has a metallic coating
(either low emissivity (low E) or reflective) and both of the other lites are clear glass.
1.8 This test method also includes a procedure for verifying the accuracy of the readings of the test apparatus.
1.9 The values stated in SI units are to be regarded as the standard. The values given in parentheses are mathematical
conversions to inch-pound units that are provided for information only and are not considered standard.
1.10 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. For specific warning statements, refer to 7.1.
2. Referenced Documents
2
2.1 ASTM Standards:
C162 Terminology of Glass and Glass Products
C717 Terminology of Building Seals and Sealants
E631 Terminology of Building Constructions Terminology of Building Constructions
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E2190 Specification for Insulating Glass Unit Performance and Evaluation
3. Terminology
3.1 For definitions of terms found in this test method, refer to Terminologies C162, C717, and E631.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 sealed insulating glass unit—an assembled unit, comprising sealed lites of glass separated by dehydrated space(s),
normally intended for clear vision areas of buildings.
4. Summary of Test Method
4.1 The spark emission spectroscope is placed against the glass surface of a sealed insulating glass unit in a prescribed manner.
1
This test method is under the jurisdiction ofASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.22 on Durability
Performance of Building Constructions.
Current edition approved April 1, 2009. Published May 2009. DOI: 10.1520/E2649-09.
CurrenteditionapprovedApril1,2012.PublishedMay2012.Originallyapprovedin2009.Lastpreviouseditionapprovedin2009asE2649–09.DOI:10.1520/E2649-09.
2
For referencedASTM standards, visit theASTM website, www.astm.org,or contactASTM 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
E2649–12
A high voltage, at low current, is applied to the glass surface. This voltage creates a spark which induces a plasma from the gas
molecules inside the test specimen. This causes light emissions (photons) of characteristic wavelengths. The instrument then
collects the photons and analyzes them by spark emission spectroscopy. The resulting spectrum is compared to calibration data
internal to the instrume
...
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