Showing results: 136 - 150 of 158 items found.
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National Technical Systems
Tin whiskers pose a serious problem for electronics of all types. When used as a finish material for electronic components, pure tin can spontaneously grow conductive whiskers. These structures can form electrical paths, affecting the operation of the subject device. The scientific community has yet to agree on the reason for tin whisker growth. Some theories suggest that tin whiskers might occur due to a mechanism of stress relief, especially “compressive” stress, within the tin plating.
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National Technical Systems
NTS’s thermal vacuum testing services have been used in preparation for both manned and unmanned spaceflight. We have worked directly with government agencies and associated contractors to develop and maintain accurate, controlled conditions suitable for performing thermal tests.
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National Technical Systems
Prolonged exposure to solar radiation can be very damaging to equipment that is stored or used outdoors. NTS operates state-of-the-art solar radiation testing facilities, capable of testing to solar standards for various different product types. We utilize proprietary sources of radiation to provide the spectral content and irradiance to the exacting requirements specified by these standards. We also provide the exact temperatures and wind speeds required by these standards.
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National Technical Systems
Transportation simulation testing involves the application or simulation of environments found in the transport of goods and equipment. These environments may include vibration, drop or shock, temperature, loose cargo or bounce, as well as other dynamic or climatic environments. Products and equipment are usually tested in the “shipping” configuration which means they would be packed in the default shipping container or transit case during the test. However, some items may also be tested in an unpacked state if there is an expectation that they might frequently be transported in that manner. Tests are performed not only to test the effects of transport on the product itself, but also to test the adequacy of shipping container design and the interaction between product and container during shipping. There are a number of possible modes of transport for any given item subject to shipping.
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National Technical Systems
NTS is one of only a few facilities in the world capable of performing simulation testing that mimics the extreme conditions found in the upper atmosphere and outer space. By precisely controlling temperature, altitude and humidity, we give you a clearer picture of how your product will respond, allowing you to make engineering changes that reduce your liability and simplify your path to regulatory compliance.
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National Technical Systems
UL’s testing services are organized into sections that evaluate specific types of products. To establish recognition, manufacturers are requested to submit samples for assessment in accordance with specific UL standards. NTS performs the applicable evaluation and testing of these samples and then assembles the data packet for UL review. Upon compliant results, UL then evaluates the test data and makes the final determination as to whether a product is eligible for recognition. Upon test data review and acceptance by UL, Notification of Authorization (NofA) is issued to the manufacturer to apply the UL certification mark to their products.
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National Technical Systems
The ability to withstand sudden changes in temperature is a key attribute for products and components that are subject to harsh environmental conditions or used in other rugged applications. NTS offers several protocols for testing components against the effects of thermal shock, helping you deliver a more reliable end product and maintain compliance with MIL-STD-810 and other standards.
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National Technical Systems
One of the most common mechanical testing methods, tensile testing, is used to determine the behavior of a sample while an axial stretching load is applied. These types of tests may be performed under ambient or controlled (heating or cooling) conditions to determine the tensile properties of a material.
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National Technical Systems
The Solderability test method provides optional conditions for preconditioning and soldering for the purpose of assessing the solderability of device package terminations. It provides procedures for dip & look solderability testing of through hole, axial and surface mount devices and a surface mount process simulation test for surface mount packages.
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ASTM D1781 -
National Technical Systems
This test method is used to compare adhesion between flexible and rigid adherents, or between flexible facing of a sandwich structure and its core. Comparisons of adhesives and processes are only applicable when test specimens and conditions are the same. The peel resistance may indicate degree of cure for relatively brittle adhesives.
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National Technical Systems
Severe wind and rain conditions can be encountered anywhere in the world, often with little notice. Excessive wind can interfere with communications equipment, lead to premature wear and corrosion, and limit radar effectiveness. Properly testing your product or system components against wind and rain is necessary both for regulatory compliance and overall quality control.
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National Technical Systems
Many products that operate in warm, humid environments must be tested to withstand fungal attacks, since this problem can cause a myriad of operational challenges. From interfering with delicate system components to causing premature wear and corrosion, a fungal infestation can lead to a number of problems than affect the lifespan of your product and potentially cause serious liability issues.
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National Technical Systems
Salt-fog and salt spray testing is conducted to determine the effectiveness of protective coatings and finishes on materials, as well as the effects of salt deposits on the physical and electrical aspects of a product. NTS can conduct your corrosion testing to meet the requirements of various regulatory standards as well as customized testing programs. We have the chambers, support equipment and the technical expertise to ensure the proper application of testing requirements to your product in a professional laboratory environment.
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National Technical Systems
Scanning Acoustic Microscopy, also known as C-SAM or Acoustic Micro Imaging or AMI, outstanding benefit is its ability to find hidden defects within assemblies and materials that can occur during manufacturing or environmental testing. Defects such as delaminations, voids and cracks can be identified and analyzed more effectively using Acoustic Microscopy than with any other inspection method.Unlike other non-destructive techniques such as X-Ray and Infrared Imaging, Acoustic Microscopy is highly sensitive to the elastic properties of the materials it travels through. Because of this, the ability of Acoustic Microscopy to find and characterize these physical defects is clearly superior. Typical applications include production control, failure analysis, and product development.Through the use of ultra-high frequency ultrasound, C-SAM non-destructively finds and characterizes physical defects—such as cracks, voids, delaminations and porosity— that occur during manufacturing, environmental testing or even under normal component operation. Because of the unique aspects of the technology, AMI can locate these defects better than any other inspection method.
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National Technical Systems
NTS has a number of facilities capable of conducting dual shaker testing, vibration testing utilizing multiple electrodynamic exciters, for the evaluation of large payloads.Once such example was conducted as part of the test program for NASA’s Lunar Atmosphere and Dust Environment Explorer or LADEE. NTS worked with NASA’s Ames Research Center for simulated environmental testing of the LADEE observatory which included dual shaker vibration.Vibration testing on the observatory was conducted utilizing the NTS Santa Clarita facilities tandem Ling B-340 electrodynamic exciters. These exciters allow either dual shaker vibration testing, or in the case of the LADEE observatory tests, they minimize the test set-up time. The electrodynamic exciters were staged with one in the thrust axis and the other set-up for lateral axes vibration. This dual shaker set up allowed for a quick transition from one test to the other. During the tests, the vibration test lab was maintained at a class 10,000 cleanliness level.
