ASTM D1494-12

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 and health practices and determine the applicability of regulatory limitations prior to use. Note 1—There is no know ISO equivalent to this standard..

General Information

• Status: Historical
• Publication Date: 30-Sep-2012
• ICS: 83.120 - Reinforced plastics
• ICS: 83.140.10 - Films and sheets
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.24 - Plastic Building Products

Relations

• Replaces: ASTM D1494-97(2008)e1 - Standard Test Method for Diffuse Light Transmission Factor of Reinforced Plastics Panels
• Effective Date: 01-Oct-2012
• Referred By: ASTM E179-17(2022) - Standard Guide for Selection of Geometric Conditions for Measurement of Reflection and Transmission Properties of Materials
• Effective Date: 01-Oct-2012
• Referred By: ASTM D3841-21 - Standard Specification for Glass-Fiber-Reinforced Polyester Plastic Panels
• Effective Date: 01-Oct-2012

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D1494 − 12 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 Department of Defense.
1. Scope* 2.2 ASTM Adjuncts:
Test Cabinet for Diffuse Light Transmission Factor of
1.1 This test method covers the determination of the diffuse
3
Reinforced Panels
light transmission factor of translucent reinforced plastics
building panels.
3. Terminology
1.2 The values stated in SI units are to be regarded as the
3.1 Definitions:General—Definitionsareinaccordancewith
standard. The values given in the parentheses are for informa-
Terminology D883 and abbreviations with Terminology
tion only.
D1600, unless otherwise indicated.
1.3 The text of this standard references notes and footnotes
4. Significance and Use
which provide explanatory material. These notes and footnotes
4.1 The purpose of this test method is to obtain the diffuse
(excluding those inTables and Figures) shall not be considered
light transmittance factor of both flat and corrugated translu-
as requirements of this standard.
cent building panels by the use of simple apparatus and by
1.4 This standard does not purport to address all of the
employing as a light source a combination of fluorescent tubes
safety concerns, if any, associated with its use. It is the
whose energy distribution closely approximates CIE Source C.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Apparatus
bility of regulatory limitations prior to use.
5.1 The apparatus for this test method shall consist of a
NOTE 1—There is no know ISO equivalent to this standard.
transmissometer, Fig. 1, comprising essentially the following:
5.1.1 Light Source—Theilluminationshallconsistoftwelve
2. Referenced Documents
20-W fluorescent tubes which are assembled in three banks of
2
2.1 ASTM Standards: four tubes each, according to the following schedule: daylight,
D618 Practice for Conditioning Plastics for Testing
deluxe cool white, blue, and daylight.
D883 Terminology Relating to Plastics 5.1.2 Photometer—The photometer shall consist of a pho-
D1600 Terminology forAbbreviatedTerms Relating to Plas-
tocell and of a galvanometer. The photocell shall be of the
tics barrier-layer type and shall contain a visual correction filter.
E691 Practice for Conducting an Interlaboratory Study to
The assembly preferably should be hermetically sealed into
Determine the Precision of a Test Method plastic as a protection against moisture. The indicating galva-
nometer should contain one scale graduated from 0 to 100, and
a circuit with sufficient variable resistance so that the sensitiv-
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
ity of the photometer can be adjusted over the range of 50 to
and is the direct responsibility of Subcommittee D20.24 on Plastic Building
100 footcandles.
Products.
5.1.3 Test Cabinet, constructed in accordance with the
Current edition approved Oct. 1, 2012. Published November 2012. Originally
ε1
3
approved in 1957. Last previous edition approved in 2008 as D1494 – 97 (2008) .
following dimensions.
DOI: 10.1520/D1494-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. 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 − 12
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
5.1.3.1 The transmitted area of the test specimen shall be bottom of the test specimen to the bottom of the masking plate
1
3 1
610.0 6 1.6 mm by 610.0 6 1.6 mm (24 6 ⁄16 in. by 24 6 shall be 233.0 6 0.8 mm (9 ⁄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.
´1
Designation: D1494 − 97 (Reapproved 2008) D1494 − 12 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 Department of Defense.
1
εNOTE—Editorial changes were made throughout in April 2008.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
NOTE 1—There is no know ISO equivalent to this standard.
2. Referenced Documents
2
2.1 ASTM Standards:
C618D618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in ConcretePractice for Conditioning
Plastics for Testing
D883 Terminology Relating to Plastics
D1600 Terminology for Abbreviated Terms Relating to Plastics
D4968 Guide for Annual Review of Test Methods and Specifications for Plastics
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 General—Definitions are in accordance with Terminology D883 and abbreviations with Terminology D1600, unless
otherwise indicated.
3.1 Definitions: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 March 1, 2008Oct. 1, 2012. Published April 2008November 2012. Originally approved in 1957. Last previous edition approved in 20012008
ε1
as D1494 – 00D1494 – 97 (2008) . DOI: 10.1520/D1494-97R08E01.10.1520/D1494-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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 − 12
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 twelve 20-W fluorescent tubes which are assembled in three banks of four
tubes each, according to the following schedule: daylight, deluxe cool white, blue, and daylight.
5.1.2 Photometer—The photometer shall consist of a photocell and of a
...