ASTM E546-14
(Test Method)Standard Test Method for Frost/Dew Point of Sealed Insulating Glass Units
Standard Test Method for Frost/Dew Point of Sealed Insulating Glass Units
SIGNIFICANCE AND USE
5.1 This test method and the apparatus described are intended primarily for sealed insulating glass units positioned horizontally. If the procedure is applied to such units in other than a horizontal position, the results may not be comparable to those obtained by this procedure.
Note 1: A similar method is Test Method E576.
SCOPE
1.1 This test method describes a laboratory procedure for determining the frost/dew point within the air space(s) of sealed insulating glass units, and establishes the criteria for determining whether that point is below or above a given or specified temperature.
1.2 This test method also describes the apparatus to be used for these determinations.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 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 hazard statements, see 9.1.3.
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Designation: E546 − 14
Standard Test Method for
1
Frost/Dew Point of Sealed Insulating Glass Units
This standard is issued under the fixed designation E546; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3. Terminology
1.1 This test method describes a laboratory procedure for 3.1 Definitions—Fordefinitionsofgeneraltermsusedinthis
determining the frost/dew point within the air space(s) of test method, refer to Terminology E631.
sealed insulating glass units, and establishes the criteria for
3.2 Definitions of Terms Specific to This Standard:
determining whether that point is below or above a given or
3.2.1 frost/dew point, n—the temperature at which water,
specified temperature.
organic vapor, or other chemicals begin to appear on the
1.2 This test method also describes the apparatus to be used interiorglasssurfaceofasealedinsulatingglassunitincontact
for these determinations. with the measuring surface of the frost/dew-point apparatus.
3.2.2 frost state—the case where the frost/dew point of a
1.3 The values stated in inch-pound units are to be regarded
sealed insulating glass unit is above the test temperature
as standard. The values given in parentheses are mathematical
specified by the purchaser or user.
conversions to SI units that are provided for information only
and are not considered standard.
3.2.3 no-frost state—the case where the frost/dew point of a
sealed insulating glass unit is below the temperature specified
1.4 This standard does not purport to address all of the
by the purchaser or user.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety and health practices and determine the applica-
4.1 This test method is conducted by the use of a special
bility of regulatory limitations prior to use. For specific hazard
apparatus, consisting basically of two chilled cylindrical metal
statements, see 9.1.3.
blocks positioned one over the other and separated by a gap of
2. Referenced Documents controllable distance. The upper block has an exposed flat
circular surface, 1 in. (25 mm) in diameter, and can be chilled
2
2.1 ASTM Standards:
to far below the ice point by regulating the air-gap distance
C1036Specification for Flat Glass
between it and the lower metal block which is maintained at
E77Test Method for Inspection and Verification of Ther-
approximately−109°F (−78°C) by dry ice. The test specimen
mometers
is placed in contact with this chilled flat circular surface of the
E576Test Method for Frost/Dew Point of Sealed Insulating
upper block for specified short periods of time, with the metal
Glass Units in the Vertical Position
surface at successively lower temperatures, to determine at
E631Terminology of Building Constructions
what temperature frost appears on the corresponding lower air
space glass surface.
1
This test method is under the jurisdiction of ASTM Committee E06 on
5. Significance and Use
Performance of Buildings and is the direct responsibility of Subcommittee E06.22
on Durability Performance of Building Constructions.
5.1 This test method and the apparatus described are in-
Current edition approved Dec. 1, 2014. Published December 2014. Originally
tended primarily for sealed insulating glass units positioned
approved in 1975. Last previous edition approved in 2008 as E546–08. DOI:
horizontally. If the procedure is applied to such units in other
10.1520/E0546-14.
2
thanahorizontalposition,theresultsmaynotbecomparableto
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
those obtained by this procedure.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. NOTE 1—A similar method is Test Method E576.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E546 − 14
6. Apparatus inserted in the upper block; a control ring; and an insulated
3 containment cylinder fitted with a retainer spring assembly.
6.1 Test Apparatus (see Fig. 1), consisting of upper and
The two metal blocks are separated by a small air gap, the
lower cylindrical metal blocks with a thermocouple, bimetallic
distance of which can be regulated by the control ring. The
thermometer, or other suitable temperature sensors being
exposedflatcircularsurfaceoftheupperblockis1in.(2
...
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: E546 − 08 E546 − 14
Standard Test Method for
1
Frost/Dew Point of Sealed Insulating Glass Units
This standard is issued under the fixed designation E546; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This test method describes a laboratory procedure for determining the frost/dew point within the air space(s) of sealed
insulating glass units, and establishes the criteria for determining whether that point is below or above a given or specified
temperature.
1.2 This test method also describes the apparatus to be used for these determinations.
1.3 The values stated in SIinch-pound units are to be regarded as the standard. The values given in parentheses are for
information only. mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 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 hazard statements, see 9.1.3.
2. Referenced Documents
2
2.1 ASTM Standards:
C1036 Specification for Flat Glass
E77 Test Method for Inspection and Verification of Thermometers
E576 Test Method for Frost/Dew Point of Sealed Insulating Glass Units in the Vertical Position
E631 Terminology of Building Constructions
3. Terminology
3.1 Definitions—For definitions of general terms used in this test method, refer to Terminology E631.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 frost state—the case where the frost/dew point of a sealed insulating glass unit is above the test temperature specified by
the purchaser or user.
3.2.1 frost/dew point, n—the temperature at which water, organic vapor, or other chemicals begin to appear on the interior glass
surface of a sealed insulating glass unit in contact with the measuring surface of the frost/dew-point apparatus.
3.2.2 frost state—the case where the frost/dew point of a sealed insulating glass unit is above the test temperature specified by
the purchaser or user.
3.2.3 no-frost state—the case where the frost/dew point of a sealed insulating glass unit is below the temperature specified by
the purchaser or user.
4. Summary of Test Method
4.1 This test method is conducted by the use of a special apparatus, consisting basically of two chilled cylindrical metal blocks
positioned one over the other and separated by a gap of controllable distance. The upper block has an exposed flat circular surface,
25 mm (1 in.)1 in. (25 mm) in diameter, and can be chilled to far below the ice point by regulating the air-gap distance between
it and the lower metal block which is maintained at approximately −78°C (−109°F)approximately −109°F (−78°C) by dry ice. The
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 on Durability
Performance of Building Constructions.
Current edition approved April 1, 2008Dec. 1, 2014. Published May 2008December 2014. Originally approved in 1975. Last previous edition approved in 19992008 as
ε1
E546 – 88 (1999)E546 – 08. . DOI: 10.1520/E0546-08.10.1520/E0546-14.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E546 − 14
test specimen is placed in contact with this chilled flat circular surface of the upper block for specified short periods of time, with
the metal surface at successively lower temperatures, to determine at what temperature frost appears on the corresponding lower
air space glass surface.
5. Significance and Use
5.1 This test method and the apparatus described are intended primarily for sealed insulating glass units positioned horizontally.
If the procedure is applied to such units in other than a horizontal posit
...
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