ASTM D1494-17
(Test Method)Standard Test Method for Diffuse Light Transmission Factor of Reinforced Plastics Panels
Standard Test Method for Diffuse Light Transmission Factor of Reinforced Plastics Panels
SIGNIFICANCE AND USE
4.1 The purpose of this test method is to obtain the diffuse light transmittance factor of both flat and corrugated translucent building panels by the use of simple apparatus and by employing as a light source a combination of fluorescent tubes whose energy distribution closely approximates CIE Source C.
SCOPE
1.1 This test method covers the determination of the diffuse light transmission factor of translucent reinforced plastics building panels.
1.2 The values stated in SI units are to be regarded as the standard. The values given in the parentheses are for information only.
1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in Tables and Figures) shall not be considered as requirements of this 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: There is no known ISO equivalent to this standard.
1.5 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.
General Information
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Designation: D1494 − 17 An American National Standard
Standard Test Method for
Diffuse Light Transmission Factor of Reinforced Plastics
1
Panels
This standard is issued under the fixed designation D1494; 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* E2935 Practice for Conducting Equivalence Testing in
Laboratory Applications
1.1 This test method covers the determination of the diffuse
E691 Practice for Conducting an Interlaboratory Study to
light transmission factor of translucent reinforced plastics
Determine the Precision of a Test Method
building panels.
2.2 ASTM Adjuncts:
1.2 The values stated in SI units are to be regarded as the
Test Cabinet for Diffuse Light Transmission Factor of
standard. The values given in the parentheses are for informa-
3
Reinforced Panels
tion only.
1.3 The text of this standard references notes and footnotes
3. Terminology
which provide explanatory material. These notes and footnotes
3.1 General—Definitions are in accordance with Terminol-
(excluding those inTables and Figures) shall not be considered
ogy D883 and abbreviations with Terminology D1600, unless
as requirements of this standard.
otherwise indicated.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
4.1 The purpose of this test method is to obtain the diffuse
priate safety, health, and environmental practices and deter-
light transmittance factor of both flat and corrugated translu-
mine the applicability of regulatory limitations prior to use.
cent building panels by the use of simple apparatus and by
NOTE 1—There is no known ISO equivalent to this standard. employing as a light source a combination of fluorescent tubes
whose energy distribution closely approximates CIE Source C.
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
5. Apparatus
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5.1 The apparatus for this test method shall consist of a
mendations issued by the World Trade Organization Technical
transmissometer, Fig. 1, comprising essentially the following:
Barriers to Trade (TBT) Committee.
5.1.1 LightSource—The illumination shall consist of twelve
20-W fluorescent tubes which are assembled in three banks of
2. Referenced Documents
four tubes each, according to the following schedule: daylight,
2
2.1 ASTM Standards:
deluxe cool white, blue, and daylight.
D618 Practice for Conditioning Plastics for Testing 5.1.2 Photometer—The photometer shall consist of a pho-
D883 Terminology Relating to Plastics
tocell and of a galvanometer. The photocell shall be of the
D1600 Terminology forAbbreviatedTerms Relating to Plas- barrier-layer type and shall contain a visual correction filter.
tics
The assembly preferably should be hermetically sealed into
plastic as a protection against moisture. The indicating galva-
nometer should contain one scale graduated from 0 to 100, and
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
a circuit with sufficient variable resistance so that the sensitiv-
and is the direct responsibility of Subcommittee D20.24 on Plastic Building
ity of the photometer can be adjusted over the range of 50 to
Products.
Current edition approved Dec. 1, 2017. Published January 2018. Originally
100 footcandles.
approved in 1957. Last previous edition approved in 2012 as D1494 – 12. DOI:
10.1520/D1494-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Detailed working drawings and a bill of materials for this equipment can be
Standards volume information, refer to the standard’s Document Summary page on obtained at a nominal charge fromASTM Headquarters, 100 Barr Harbor Drive, PO
the ASTM website. Box C700, West Conshohocken, PA 19428–2959. Order Adjunct: ADJD1494.
*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 ----------------------
D1494 − 17
Metric Equivalents
in. mm in. mm in. mm in. mm
1 3 3 3
⁄32 0.8 ⁄4 19.1 8 ⁄4 222 24 ⁄4 634
3 1 3 1
⁄16 4.8 1 ⁄4 31.8 9 ⁄4 248 25 ⁄2 648
7 1
⁄37 5.6 1 ⁄2 38.1 12 305 28 711
1 1
⁄4 6
...
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: D1494 − 12 D1494 − 17 An American National Standard
Standard Test Method for
Diffuse Light Transmission Factor of Reinforced Plastics
1
Panels
This standard is issued under the fixed designation D1494; 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 covers the determination of the diffuse light transmission factor of translucent reinforced plastics building
panels.
1.2 The values stated in SI units are to be regarded as the standard. The values given in the parentheses are for information only.
1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in Tables and Figures) shall not be considered as requirements of this 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
NOTE 1—There is no know ISO equivalent to this standard.
NOTE 1—There is no known ISO equivalent to this standard.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
D1600 Terminology for Abbreviated Terms Relating to Plastics
E2935 Practice for Conducting Equivalence Testing in Laboratory Applications
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
2.2 ASTM Adjuncts:
3
Test Cabinet for Diffuse Light Transmission Factor of Reinforced Panels
3. Terminology
3.1 Definitions:General—Definitions are in accordance with Terminology D883 and abbreviations with Terminology D1600,
unless otherwise indicated.
3.1 General—Definitions are in accordance with Terminology D883 and abbreviations with Terminology D1600, unless
otherwise indicated.
4. Significance and Use
4.1 The purpose of this test method is to obtain the diffuse light transmittance factor of both flat and corrugated translucent
building panels by the use of simple apparatus and by employing as a light source a combination of fluorescent tubes whose energy
distribution closely approximates CIE Source C.
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.24 on Plastic Building Products.
Current edition approved Oct. 1, 2012Dec. 1, 2017. Published November 2012January 2018. Originally approved in 1957. Last previous edition approved in 20082012
ε1
as D1494 – 97 (2008)D1494 – 12. . DOI: 10.1520/D1494-12.10.1520/D1494-17.
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.
3
Detailed working drawings and a bill of materials for this equipment can be obtained at a nominal charge from ASTM Headquarters, 100 Barr Harbor Drive, PO Box
C700, West Conshohocken, PA 19428–2959. Order Adjunct: ADJD1494.
*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 ----------------------
D1494 − 17
Metric Equivalents
in. mm in. mm in. mm in. mm
1 3 3 3
⁄32 0.8 ⁄4 19.1 8 ⁄4 222 24 ⁄4 634
3 1 3 1
⁄16 4.8 1 ⁄4 31.8 9 ⁄4 248 25 ⁄2 648
7 1
⁄37 5.6 1 ⁄2 38.1 12 305 28 711
1 1
⁄4 6.4 2 50.8 14 356 29 ⁄2 749
9 3 1
⁄32 7.1 6 ⁄4 172 24 610 38 ⁄2 978
3
⁄8 9.5
FIG. 1 Assembly Drawing of Transmissometer
5. Apparatus
5.1 The apparatus for this test method shall consist of a transmissometer, Fig. 1, comprising essentially the following:
5.1.1 Light Source—The illumination shall consist of tw
...
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