Atlas Weather-Ometers Fully Meet New ASTM Method D7869-13

July 16, 2013, Chicago, IL – Atlas Material Testing Technology, the global leader in weathering durability testing equipment and services, is pleased to announce that its Ci Series Weather-Ometers meet the recently published test method ASTM D7869-13 Standard Practice for Xenon Arc Exposure Test with Enhanced Light and Water Exposure for Transportation Coatings

For over 20 years, SAE J1960 (and the performance-based equivalent, SAE J2527) has been the most popular test method used for testing automotive exterior materials. First developed by General Motors in the mid-1980's, the test method was soon adopted by several other automotive OEMs, especially in the United States and Japan. Despite the popularity of this method, it was deficient in terms of: (1) the quality of the spectral power distribution (SPD) for the light source, (2) moisture delivery, and (3) irradiance level to provide meaningful acceleration and correlation. 

Automotive OEM's, major paint suppliers, and weathering instrument manufacturers have conducted work for nearly 10 years to develop an artificial test that better replicates natural exposures (where South Florida is the "benchmark"), demonstrating that good scientific methodology and an understanding of both material sensitivities and details of the natural environment can be utilized to develop better artificial test cycles. The new standard has received the designation ASTM D7869-13, and is titled Standard Practice for Xenon Arc Exposure Test with Enhanced Light and Water Exposure for Transportation Coatings

Highlights of the new standard include:

         Tighter SPD requirements to match the short wavelength UV found in terrestrial daylight. The Atlas Right Light filter meets these requirements and was the basis for the ultimate requirements listed in the new test method

         Multiple irradiance levels to better match real-world conditions

         A sub-cycle with rapid changes in conditions to simulate thermal shock effects and test a material's mechanical and expansion/contraction properties as they relate to weathering

         Longer dark phases with spray to match the moisture uptake seen in South Florida exposures

The method also describes in detail a means to verify minimum spray requirements, as well as a detailed justification of each phase within the test cycle. All current Atlas Weather-Ometers can fully meet the requirements of the standard. New user interface software will soon be released that includes this cycle as a preprogrammed test, or it can easily be programmed as a custom test method. 

 

For more information please contact Atlas at: atlas.info(at)ametek.com 

 

About Atlas Material Testing Technology - www.atlas-mts.com

Atlas is a recognized leader in material testing, offering a complete line of instruments and services for accelerated and natural weathering. In addition, the Atlas Consulting Group helps clients from various industries including photovoltaics, coatings, plastics, textiles, automotive and cosmetics develop the best weathering processes for their products. 

In November 2010, Atlas joined AMETEK, Inc., a global leader in electronic instruments and electromechanical devices, as a unit of AMETEK Measurement & Calibration Technologies (M&CT). AMETEK M&CT is a division within AMETEK's Electronic Instruments Group (EIG), a recognized leader in advanced monitoring, testing, calibrating and display instruments. 

Atlas Material Testing Technology is ISO 17025 and ISO 9001:2008 registered. Atlas products are designed and manufactured to conform to international, national and industry standard test methods including ISO, ASTM, DIN, JIS and numerous others.