1、Designation: E2501 11 (Reapproved 2017)Standard Specification forLight Source Products for Inspection of FluorescentCoatings1This standard is issued under the fixed designation E2501; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、 the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification provides the requirements for lightsource products intended for excitation of fluoresc
3、ent materialsused as a system for detection of defects in industrial coatings.This includes the examination of both longer wavelengthfluorescing primer coatings as well as non-fluorescent topcoatings.1.2 This specification establishes the radiometric require-ments of the light source product in term
4、s of required wave-length range and minimum irradiance.1.3 This specification establishes safety requirements for thelight source product necessary to ensure the product will notpose a threat to visual health.1.4 The values stated in SI units are to be regarded asstandard. No other units of measurem
5、ent are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of re
6、gulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade
7、 Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2E284 Terminology of AppearanceE1341 Practice for Obtaining Spectroradiometric Data fromRadiant Sources for ColorimetryG138 Test Method for Calibration of a SpectroradiometerUsing a Standard Source of
8、Irradiance2.2 IEC Standards:3IEC 62471-2:2006 Edition 1Photobiological Safety ofLamps and Lamp Systems2.3 ANSI Standards:4ANSI/IESNA RP27.3-2005 Photobiological Safety forLamps and Lamp Systems General RequirementsANSI/ISEA Z87.1 Occupational and Educational PersonalEye and Face Protection Devices3.
9、 Terminology3.1 DefinitionsThe definitions of terms in TerminologyE284 are applicable to this standard.4. Significance and Use4.1 Light source products conforming to this specificationare intended to be used in conjunction with coatings speciallyformulated with fluorescent colorants as a system for
10、the visualdetection of defects in industrial protective coatings.4.2 Visible fluorescence from the coating enhances thecontrast of coating irregularities and defects and is produced byexcitation of visible-activated fluorescent colorants in thecoating.4.3 Light source products with defined wavelengt
11、h andintensity properties are required to produce adequate visiblefluorescence for easy visual location of defects.4.4 A light source product is considered to consist of a lightsource component incorporated into an optical, electrical,mechanical, and power supply system that makes it suitable foruse
12、 in an industrial environment. The entire light sourceproduct is subject to this standard. The light source componentand any subassemblies of the light source product are notsubject to this standard.1This specification is under the jurisdiction of ASTM Committee E12 on Colorand Appearance and is the
13、 direct responsibility of Subcommittee E12.05 onFluorescence.Current edition approved Nov. 1, 2017. Published November 2017. Originallyapproved in 2006. Last previous edition approved in 2011 as E2501 11. DOI:10.1520/E2501-11R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, o
14、rcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from International Electrotechnical Commission (IEC), 3, rue deVaremb, P.O. Box 131, CH-1211 Geneva 20, Switzerland, http
15、:/www.iec.ch.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in ac
16、cordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14.5 This specification is lim
17、ited to light source productsproviding excitation in the range from 400 to 420 nm.5. Performance Requirements5.1 Irradiance:5.1.1 The light source shall provide a minimum irradianceof 5 W/m2at 20 cm distance from the point at which the lightexits the product.5.1.2 Ninety-five percent (95 %) of the o
18、utput flux shall beof a wavelength in the range from 380 to 435 nm.5.2 Eye SafetyThe device shall conform to the require-ments of a an Exempt or Risk Group 1 product as set out in IEC62471 or ANSI/IESNA RP27.3.6. Test Method6.1 Irradiance for Section 5.1:6.1.1 Measure the light source in an environm
19、ent withambient temperature between 20 and 25C. Store the lightsource and its batteries for a minimum of 4 hours in thisenvironment before turning it on.6.1.2 Turn on the light source and allow it to operatecontinuously for 30 min before measuring irradiance. This willallow the light source to appro
20、ach a steady state operatingtemperature and for fresh batteries to discharge beyond highervoltage startup conditions.6.1.3 Measure irradiance using a spectroradiometercalibrated, verified, and operated in accordance with TestMethod G138 and Practice E1341.6.1.4 Report irradiance results in accordanc
21、e with PracticeE1341.6.1.5 Report the dimensions of the area that meet therequirements of Section 5.1.7. Certification7.1 When specified in the purchase order or contract, thepurchaser shall be furnished certification stating samples rep-resenting the light source have been tested and inspected asin
22、dicated in this specification and the requirements have beenmet. When specified in the purchase order or contract, a reportof the test results shall be furnished.8. Keywords8.1 coating inspection; fluorescent coatings; fluorescent in-spection lightANNEX(Mandatory Information)A1. VISUAL ERGONOMIC EYE
23、WEAR SPECIFICATIONA1.1 Some coatings inspectors who use inspection lightscomplying with this specification report eye discomfort andheadaches after using them for a few hours. These discomfortsare not due to ultraviolet damage of the cornea or lens, but aredue to not yet fully understood ergonomic i
24、ssues associatedwith viewing intense violet light. The symptoms are mitigatedwith tinted eyewear, but some tints that block violet light alsoblock the fluorescence emitted from the coating, therebyeliminating the defect contrast enhancement of the fluorescentcoating inspection system. Yellow or ambe
25、r-tinted glasses thatmeet the transmittance specification in Table A1.1 optimize thecoating inspectors contrast sensitivity and eliminate the an-noyance from viewing intense violet light sources. Complianceof a specific model of glasses with this specification can beevaluated, for example, by compar
26、ing a products Transmit-tance Datasheet (ANSI Z87.1 Method 14.12) to thisspecification.TABLE A1.1 Safety Eyewear Light Transmittance SpecificationLightWavelength (nm)PercentTransmittanceFrom 315 to 400 (UV-A) 1 % total UV-A transmittanceAt 400 1 %At 415 #2%At 500 $65 %From 520 to 750 Minimum 80 % at
27、 any wavelengthE2501 11 (2017)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof i
28、nfringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this sta
29、ndard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your
30、views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by conta
31、cting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 11 (2017)3
