Characterization of UV-A Lamps for MT and PT

With the eventual phase-out of traditional mercury vapor lamps, there is a need for consistent specifications covering alternative UV-A sources, such as LEDs. Traditional radiometers and luxmeters are insufficient to properly characterize UV-A lamps, and an ASTM Task Group has been formed to determine the correct procedures. This paper will show the kinds of tests used in characterization of UV-A lamps (including LEDs), typical data from several manufacturers, and explain why the use of a properly designed UV-A LED lamp is important for successful penetrant and magnetic particle examinations.

References
1. “Persistent Lines of Neutral Mercury (Hg I),” National Institute of Standards and Technology, physics.nist.gov/ PhysRefData/Handbook/Tables/mercurytable3.htm, retrieved on August 13, 2013. 2. Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment, Directive 2002/95/EC, European Parliament and Council. 2003. 3. Energy Policy Act of 2005, HR6 109th Congress of the United States of America. 2005. 4. Energy Independence and Security Act of 2007, HR6 110th Congress of the United States of America. 2007. 5. Standard Guide for Use of UV-A and Visible Light Sources and Meters used in the Liquid Penetrant and Magnetic Particle Methods, E2297-04(10), ASTM International, West Conshohocken, PA. 2010. 6. Brausch, J.C., N.S. Heider and R. Mattis. New UVA Black Light Technologies: The Challenges and a Path Forward, Wright-Patterson Air Force Base. 2012. 7. Lopez, R. Evaluation of Excitation Sources for Fluorescent MT/PT, Deere & Company Moline Technology Innovation Center. 2011. 8. Brausch, J.C., et al., Draft Standard Practice for Measurement of Emission Characteristics for UV-A Lamps Used in Fluorescent Penetrant and Magnetic Particle Testing, ASTM E07.03 UV-A Lamp Task Group, ASTM International, West Conshohocken, PA. 2013. 9. Chase, J.D., “UV and Visible Light Issues Facing the NDT Industry,” ASNT 1989 Fall Conference Technical Program, American Society for Nondestructive Testing. 1989.
Metrics
Usage Shares
Total Views
65 Page Views
Total Shares
0 Tweets
65
0 PDF Downloads
0
0 Facebook Shares
Total Usage
65