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Environmental Testing
{{noref, date=January 2021 Environmental testing is the measurement of the performance of equipment under specified environmental conditions, such as: * extremely high and low temperatures * large, swift variations in temperature * blown and settling sand and dust * salt spray and salt fog * very high or low humidity * wet environments, waterproofness, icing * presence of corrosive material * fungus, fluids susceptibility * vibrations (airborne and structural), gun fire * accelerations * solar radiation * high and low pressures (especially for aeronautical and space equipment) * operating at angles (especially for marine, aeronautical and space equipment) * electromagnetic interference (EMI), ESD, Lightning * acoustic measurements * power input variations Such tests are most commonly performed on equipment used in military, maritime, aeronautical and space applications. See Environmental test chambers for more information about environmental testing equipment. Environmental test st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Test Chambers
An environmental chamber, also called a climatic chamber or climate chamber, is an enclosure used to test the effects of specified environmental conditions on biological items, industrial products, materials, and electronic devices and components. Such a chamber can be used: # as a stand-alone test for environmental effects on test specimens # as preparation of test specimens for further physical tests or chemical tests # as environmental conditions for conducting testing of specimens Overview An environmental test chamber artificially replicates conditions which machinery, materials, devices or components might be exposed to. It is also used to accelerate the effects of exposure to the environment, sometimes at conditions not actually expected. Chamber testing involves testing and exposing products to various environmental conditions in a controlled setting. Climatic Chamber testing and Thermal Shock testing are part of chamber testing. Climatic Chamber testing is a broad c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MIL-STD-810
MIL-STD-810, U S Department of Defense Test Method Standard, Environmental Engineering Considerations and Laboratory Tests, is a United States Military Standard that emphasizes tailoring an equipment's environmental design and test limits to the conditions that it will experience throughout its service life, and establishing chamber test methods that replicate the effects of environments on the equipment rather than imitating the environments themselves. Although prepared specifically for U.S. military applications, the standard is often applied for commercial products as well. The standard's guidance and test methods are intended to: * define environmental stress sequences, durations, and levels of equipment life cycles; * be used to develop analysis and test criteria tailored to the equipment and its environmental life cycle; * evaluate equipment's performance when exposed to a life cycle of environmental stresses * identify deficiencies, shortcomings, and defects in equipment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IEC 60068
IEC 60068 is an international standard for the environmental testing of electrotechnical products that is published by the International Electrotechnical Commission (IEC). IEC 60068 is a collection of methods for environmental testing of electronic equipment and products to assess their ability to perform under environmental conditions including extreme cold and dry heat. IEC 60068 offers appropriate severities and prescribes various environmental conditions for measurements and tests. IEC 60068 has three parts: * IEC 60068-1: General and guidance * IEC 60068-2: Tests * IEC 60068-3: Supporting documentation and guidance Tests Some of the tests have been withdrawn, replaced, or merged with other documents or standards. IEC 60068-2-1 - Test A: Cold IEC 60068-2-2 - Test B: Dry heat IEC 60068-2-5 - Test S: Simulated solar radiation at ground level and guidance for solar radiation testing and weathering IEC 60068-2-6 - Test Fc: Vibration (sinusoidal) IEC 60068-2-7 - Test Ga and gui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IEC 60945
The International Electrotechnical Commission (IEC; in French: ''Commission électrotechnique internationale'') is an international standards organization that prepares and publishes international standards for all electrical, electronic and related technologies – collectively known as "electrotechnology". IEC standards cover a vast range of technologies from power generation, transmission and distribution to home appliances and office equipment, semiconductors, fibre optics, batteries, solar energy, nanotechnology and marine energy as well as many others. The IEC also manages four global conformity assessment systems that certify whether equipment, system or components conform to its international standards. All electrotechnologies are covered by IEC Standards, including energy production and distribution, electronics, magnetics and electromagnetics, electroacoustics, multimedia, telecommunication and medical technology, as well as associated general disciplines such as term ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DO-160
DO-160, Environmental Conditions and Test Procedures for Airborne Equipment is a standard for the environmental testing of avionics hardware. It is published by the Radio Technical Commission for Aeronautics (RTCA) and supersedes DO-138. Outline of contents Introduction The DO-160 document was first published on February 28, 1975 to specify test conditions for the design of avionics electronic hardware in airborne systems. Since then the standard has undergone subsequent revisions up through Revision G. Purpose This document outlines a set of minimal standard environmental test conditions (categories) and corresponding test procedures for airborne equipment for the entire spectrum of aircraft from light general aviation aircraft and helicopters through the jumbo jets and supersonic transport categories of aircraft. The purpose of these tests is to provide a controlled (laboratory) means of assuring the performance characteristics of airborne equipment in environmental conditions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MIL-STD-461
MIL-STD-461 is a United States Military Standard that describes how to test equipment for electromagnetic compatibility Electromagnetic compatibility (EMC) is the ability of electrical equipment and systems to function acceptably in their electromagnetic environment, by limiting the unintentional generation, propagation and reception of electromagnetic energy whic .... The United States Department of Defense issued MIL-STD-461 in 1967 to integrate electromagnetic compatibility into the research and development stage for defense communications technology. Various revisions of MIL-STD-461 have been released. Many military contracts require compliance to MIL-STD-461E. The latest revision (as of 2015) is known as "MIL-STD-461G". While MIL-STD-461 compliance is technically not required outside the US military, many civilian organizations also use this document. In 1999, MIL-STD-462 was combined with MIL-STD-461D into MIL-STD-461E. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Stress Screening
Environmental stress screening (ESS) refers to the process of exposing a newly manufactured or repaired product or component (typically electronic) to stresses such as thermal cycling and vibration in order to force latent defects to manifest themselves by permanent or catastrophic failure during the screening process. The surviving population, upon completion of screening, can be assumed to have a higher reliability than a similar unscreened population. Overview Developed to help electronics manufacturers detect product defects and production flaws, ESS is widely used in military and aerospace applications, less so for commercial products. The tests need not be elaborate, for example, switching an electronic or electrical system on and off a few times may be enough to catch some simple defects that would otherwise be encountered by the end user very soon after the product was first used. Tests typically include the following: * Temperature variations * Vibration tests * Pressure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct Field Acoustic Testing
Direct-field acoustic testing, or DFAT, is a technique used for acoustic testing of aerospace structures by subjecting them to sound waves created by an array of acoustic drivers. The method uses electro-dynamic acoustic speakers, arranged around the test article to provide a uniform, well-controlled, direct sound field at the surface of the unit under test. The system employs high capability acoustic drivers, powerful audio amplifiers, a narrow-band multiple-input-multiple-output (MIMO) controller and precision laboratory microphones to produce an acoustic environment that can simulate a helicopter, aircraft, jet engine or launch vehicle sound pressure field. A high level system is capable of overall sound pressure levels in the 125–147 dB for more than one minute over a frequency range from 25 Hz to 10 kHz. Overview A direct field is generated by audio drivers arranged to encircle the test article. Two different control schemes can be used to perform a direc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Technischer Überwachungsverein
TÜVs (; short for german: Technischer Überwachungsverein, en, Technical Inspection Association) are internationally active, independent service companies from Germany and Austria that test, inspect and certify technical systems, facilities and objects of all kinds in order to minimize hazards and prevent damages. The TÜV companies are organized into three large holding companies, TÜV Nord, TÜV Rheinland and TÜV SÜD (with TÜV Hessen), along with the smaller independent companies TÜV Thüringen, TÜV Saarland and TÜV Austria. History With the increasing number and efficiency of steam engines during the Industrial Revolution, there had been more and more accidents caused by exploding (or more precisely, bursting) boilers. After the explosion of the boiler at the Mannheim Aktienbrauerei in January 1865, the idea was pursued there to subject boilers to regular inspections on a voluntary basis, as was already the case in Great Britain. Twenty boiler owners in Baden joined in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Testing
{{noref, date=January 2021 Environmental testing is the measurement of the performance of equipment under specified environmental conditions, such as: * extremely high and low temperatures * large, swift variations in temperature * blown and settling sand and dust * salt spray and salt fog * very high or low humidity * wet environments, waterproofness, icing * presence of corrosive material * fungus, fluids susceptibility * vibrations (airborne and structural), gun fire * accelerations * solar radiation * high and low pressures (especially for aeronautical and space equipment) * operating at angles (especially for marine, aeronautical and space equipment) * electromagnetic interference (EMI), ESD, Lightning * acoustic measurements * power input variations Such tests are most commonly performed on equipment used in military, maritime, aeronautical and space applications. See Environmental test chambers for more information about environmental testing equipment. Environmental test st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Technology
Environmental technology (envirotech) or green technology (greentech), also known as ''clean technology'' (''cleantech''), is the application of one or more of environmental science, green chemistry, environmental monitoring and electronic devices to monitor, model and conserve the natural environment and resources, and to curb the negative impacts of human involvement. The term is also used to describe sustainable energy generation technologies such as photovoltaics, wind turbines, etc. Sustainable development is the core of ''environmental technologies''. The term ''environmental technologies'' is also used to describe a class of electronic devices that can promote sustainable management of resources. Purification and waste management Examples *Biofiltration *Bioreactor *Bioremediation *Desalination *Thermal depolymerization *Composting toilet *Pyrolysis Water purification Water purification: The whole idea/concept of having dirt/germ/pollution free water flowing throughou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
