Environmental Stress Screening (ESS) Services
Environmental Stress Screening is more of a process rather than a test. Rocky Mountain Testing Solutions offers ISO 9001:2015 by NSF-ISR at the following sites: 2758 North. 1600 West Pleasant View, Utah 84404 certified ESS, environmental stress screening services, to expose defects in parts or process problems prior to qualification tests. These defects are not as easily spotted in visual inspections or electrical testing. Stress screening of any kind is the best way to show premature failure or potential weaknesses in a newly developed product.
Our environmental test chambers at Rocky Mountain Testing Solutions are available in reach-in and walk-in sizes, ideal to match the size of your package or product perfectly. No matter what industry you belong to, our chambers will give you a clear picture of how your package will withstand the elements.
The Breakdown of ESS Temperature Testing
Random vibration testing (include sine, random, sine on random, resonance search, and fixture evaluation) and temperature cycling have proven to be very successful forms of ESS. Utilizing the entire process of ESS will test operating and destruct margins. Vibration, thermal cycling, pressure variations, flexibility, and power cycling are tested in our environmental test chambers to find where your product may need to be adjusted.
This process was first developed by military personnel to reduce problems in complex electronic assemblies. A series of tests can occur during ESS ranging from basic to more extreme elements like extreme temperatures and vibration cycles. Some of these subtests include HALT and HASS.
HALT (Highly Accelerated Stress Test) tests or HASS (Highly Accelerated Stress Screening) tests are subtests or actions that are performed later in the process of ESS. These can be performed on products at different levels of production. HALT focuses on the weaknesses that can be found in a product as well as narrowing down the stress limits. The HALT test will tell manufacturers the operation and destruct levels of the product. Once you know these stress limits, you can perform appropriate HASS tests to ensure your product performs at maximum efficiency.
Standard Required For ESS Testing
The primary standards for commercial and military test methods are:
- MIL-STD 810 Method 514
- DOD-HDBK-344, Environmental Stress Screening of Electronic Equipment
- RADC-TR-86-149, Environmental Stress Screening
- Mil-STD 202
- NAVMAT P-9492
- Customer specified
ESS Equipment Capabilities
RMTS can simulate temperature cycling, combined temperature cycling and vibration conditions
as required by aerospace, commercial, and military procedures.
- LN2 boost and boost Heat
- Temperature range of -100°C to +200°C (-148°F to +400°F)
- Temperature rate of change up to 50°C/minute
- Random vibration up to 50 Grms & 3,000 Hz frequency range
Why Implement ESS Temperature Testing
Effective ESS screening programs, which are applied during your product development and production phases, can yield significant test time savings, cost savings, and improvements in field reliability. Producing a quality product is about more than just looks and proper measurements. Knowing strengths and weaknesses can help products withstand the extremes and be used in multiple applications. Proper testing can also increase the strength and longevity of mechanisms. The maturity of your manufacturing process will determine how the screening test works, but an RMTS lab technician will assist you in choosing an environmental stress screening profile with several different methods available. Typical program steps are ESS planning, implementation, and monitoring.
Contact us if you’re ready with your project now or if you need assistance in developing an ESS strategy.
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