Tag: environmental simulation
The U.S. Department of Defense (DoD) recently issued Change Notice 1 to MIL-STD-810G, Environmental Engineering Considerations and Laboratory Tests. This change notice incorporates more changes – climatic and dynamic – than any previous revision of -810.
A PDF of Notice 1 is available here. It’s a bulging 1,058 pages, over 280 pages more than the Revision G alone and more than twice as many pages as Revision F. Changes are marked by lines in the margins.
Major changes include:
- In Part 1, a significantly expanded section on the Life Cycle Environmental Profile (LCEP)
- In Part 2, all test methods – 500 through 528 – have been updated with a new note
- Only Method 528 can be called out in blanket fashion now
- A rewrite of mechanical shock
- Additional guidance in combining procedures
MIL-STD-810 is used by both the U.S. military and industry to assure that the environmental design and test limits of equipment match the requirements that equipment will face in actual use.
Whether a military product must be tested to Change Notice 1 is dependent on the DoD contract. The DoD uses the product’s life cycle environmental profile and its anticipated deployment region to determine which standard version to specify.
MET Labs is an elite 3rd Party Test Lab for Military and Commercial Aircraft equipment testing, and has top-flight experience working with every top defense contractor and commercial aircraft manufacturer and many of their suppliers. Contact us for a rapid-response quote for EMC or Environmental Simulation testing.
Last month, a U.S. House of Representatives committee asked the Missile Defense Agency to consider the use of Highly Accelerated Life Testing and Highly Accelerated Stress Screening (HALT/HASS) for identifying possible reliability issues in critical ballistic missile defense (BMD) systems and components.
The committee also believes HALT testing can help ferret out unreliable counterfeit parts that enter into the missile defense supply chain.
From the report:
“Effective utilization of modern methods and equipment for highly accelerated life testing and highly accelerated stress screening (HALT/HASS) during early design stages has been demonstrated to yield significant improvements in reliability and more effective product designs, as well as cost savings. Through modern HALT/HASS testing, key components and subcomponents are subjected to overstresses, revealing latent design flaws (including those based on the use of faulty or counterfeit parts) that can go undetected with legacy testing approaches.”
The House committee asks the Director of the Missile Defense Agency to conduct an assessment of the value, feasibility, and cost of greater utilization of modern HALT /HASS testing equipment and processes to:
- Shorten design and development timelines
- Reduce system and component testing and lifecycle costs
- Enhance reliability of critical missile defense systems and components
- Help address the growing problem of detecting and preventing the introduction of counterfeit parts
The Missile Defense Agency Director is asked to provide his recommendations regarding use of HALT/HASS by January 15, 2014.
Learn why HALT tests are superior to traditional reliability tests in a free HALT webinar next week.
Ask to tour MET’s HALT testing setup in one of our environmental simulation labs.
Last month, Verizon revised its Technical Purchasing Requirement VZ.TPR.9203 to include testing requirements by location for wireless Network Equipment Building System (NEBS) equipment. Issue 5 replaces Issue 4, which dated from March, 2009.
Wireless equipment is a small, but growing, portion of the overall NEBS market.
VZ.TPR.9203 Issue 5 includes a new “Table 2,” which details wireless requirements by location for testing to GR-63-CORE Issue 3 (environmental simulation), GR-1089-CORE Issue 4 (electromagnetic compatibility and safety), and VZ.TPR.9205 TEEER (energy efficiency).
Issue 5 maintains Table 1, which details testing requirements by location for “wireline” or landline NEBS equipment.
For wireless, equipment located in Mobile Switching Centers (MSC) has the most testing requirements, followed by Hubs, and Cell Sites, which has the fewest testing requirements.
In other Verizon NEBS news, the telecom giant issued this month a new Technical Purchasing Requirement – VZ.TPR.9508 – to define the minimum required NEBS and battery reserve testing for VRLA batteries supporting FiOS services.
Verizon NEBS compliance is gained through the Verizon Independent Testing Laboratories (ITL) NEBS Testing Certification Program (NEBS-TCP). MET Labs is one of the independent labs recognized by Verizon under the NEBS-TCP program.
Read more about Verizon’s NEBS requirements.
On a recent trip to Disney World, we were impressed with Epcot’s Test Track, a General Motors-sponsored ride. Not only is it thrilling, it is highly educational, introducing the concepts of automotive electromagnetic compatibility, safety, and environmental simulation to the general public.
Like all the best Disney rides, the experience begins in the pre-ride waiting area, where the line snakes through a model of an EMC chamber.
During the ride, the 6-seat vehicle undergoes the safety and quality tests that General Motors performs on every prototype it manufactures.
Most impressive is the demonstration of automotive environmental simulation testing. The car passes through an area that blasts passengers first with heat lamps, then with cold guns, for a reported 100 degree variation. Then robotic arms perform a corrosion test using misted salt water.
The ride spans nearly a mile and lasts 5 minutes, but it seemed much shorter. We went straight from the ride’s exit to its entrance, to do it all over again.