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.
30-506: The standard's guidance and test methods are intended to: The document revision as of 2019 is U.S. MIL-STD-810H. It supersedes MIL-STD-810G, Change Notice 1 which was issued in 2014. MIL-STD-810 is maintained by a Tri-Service partnership that includes the United States Air Force , Army , and Navy . The U.S. Army Test and Evaluation Command , or ATEC, serves as Lead Standardization Activity / Preparing Activity, and
60-550: A broad range of environmental conditions that include: low pressure for altitude testing; exposure to high and low temperatures plus temperature shock (both operating and in storage); rain (including wind blown and freezing rain); humidity, fungus, salt fog for corrosion testing; sand and dust exposure; explosive atmosphere; leakage; acceleration; shock and transport shock; gunfire vibration; and random vibration. The standard describes environmental management and engineering processes that can be of enormous value to generate confidence in
90-453: A development history of test methods, rationale for many procedural changes, tailoring guidance for many test procedures, and insight into the future direction of the standard. The MIL-STD-810 test series originally addressed generic laboratory environmental testing. The first edition of MIL-STD-810 in 1962 included only a single sentence allowing users to modify tests to reflect environmental conditions. Subsequent editions contained essentially
120-431: A draft version of AR 70-38 (1990) that was developed using Air Land Battlefield Environment (ALBE) report information, Environmental Factors and Standards for Atmospheric Obscurants, Climate, and Terrain (1987) , and MIL-HDBK-310, Global Climatic Data for Developing Military Products . It also provides planning guidance for realistic consideration (i.e., starting points) of climatic conditions in various regions throughout
150-408: A given sample, product, process, or service. The purpose of testing involves a prior determination of expected observation and a comparison of that expectation to what one actually observes. The results of testing can be qualitative (yes/no), quantitative (a measured value), or categorical and can be derived from personal observation or the output of a precision measuring instrument . Usually
180-408: A given sample, product, process, or service. The purpose of testing involves a prior determination of expected observation and a comparison of that expectation to what one actually observes. The results of testing can be qualitative (yes/no), quantitative (a measured value), or categorical and can be derived from personal observation or the output of a precision measuring instrument . Usually
210-485: A product's useful life rather than simply replicating the actual environments. More recently, MIL-STD-810G implements Test Method 527 calling for the use of multiple vibration exciters to perform multi-axis shaking that simultaneously excites all test article resonances and simulates real-world vibrations. This approach replaces the legacy approach of three distinct tests, that is, shaking a load first in its x axis, then its y axis, and finally in its z axis. A matrix of
240-470: A system or component that passes laboratory tests of this standard also would pass field/fleet verification trials. Specific examples of Test Methods called out in MIL-STD-810 are listed below: Part Three contains a compendium of climatic data and guidance assembled from several sources, including AR 70-38, Research, Development, Test and Evaluation of Materiel for Extreme Climatic Conditions (1979) ,
270-486: A test result is used to predict or imply suitability for a certain purpose. For example, if a manufactured item has several components, test methods may have several levels of connections: These connections or correlations may be based on published literature, engineering studies, or formal programs such as quality function deployment . Validation of the suitability of the test method is often required. Quality management systems usually require full documentation of
300-486: A test result is used to predict or imply suitability for a certain purpose. For example, if a manufactured item has several components, test methods may have several levels of connections: These connections or correlations may be based on published literature, engineering studies, or formal programs such as quality function deployment . Validation of the suitability of the test method is often required. Quality management systems usually require full documentation of
330-464: Is a method for a test in science or engineering , such as a physical test , chemical test , or statistical test . It is a definitive procedure that produces a test result. In order to ensure accurate and relevant test results, a test method should be "explicit, unambiguous, and experimentally feasible.", as well as effective and reproducible. A test can be considered an observation or experiment that determines one or more characteristics of
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#1732793923645360-806: Is chartered under the Defense Standardization Program (DSP) with maintaining the functional expertise and serving as the DoD-wide technical focal point for the standard. The Institute of Environmental Sciences and Technology is the Administrator for WG-DTE043: MIL-STD-810, the Working Group tasked with reviewing the current environmental testing guidance and recommending improvements to the DOD Tri-Service Working Group. MIL-STD-810 addresses
390-431: Is common for a physical property to be strongly affected by the precise method of testing or measuring that property. As such, fully documenting experiments and measurements while providing needed documentation and descriptions of specifications , contracts , and test methods is vital. Using a standardized test method, perhaps published by a respected standards organization , is a good place to start. Sometimes it
420-431: Is common for a physical property to be strongly affected by the precise method of testing or measuring that property. As such, fully documenting experiments and measurements while providing needed documentation and descriptions of specifications , contracts , and test methods is vital. Using a standardized test method, perhaps published by a respected standards organization , is a good place to start. Sometimes it
450-484: Is more useful to modify an existing test method or to develop a new one, though such home-grown test methods should be validated and, in certain cases, demonstrate technical equivalency to primary, standardized methods. Again, documentation and full disclosure are necessary. A well-written test method is important. However, even more important is choosing a method of measuring the correct property or characteristic. Not all tests and measurements are equally useful: usually
480-484: Is more useful to modify an existing test method or to develop a new one, though such home-grown test methods should be validated and, in certain cases, demonstrate technical equivalency to primary, standardized methods. Again, documentation and full disclosure are necessary. A well-written test method is important. However, even more important is choosing a method of measuring the correct property or characteristic. Not all tests and measurements are equally useful: usually
510-638: The Army Air Force (AAF) released the first specification providing a formal methodology for testing equipment under simulated environmental conditions. That document, entitled AAF Specification 41065, Equipment: General Specification for Environmental Test of , is the direct ancestor of MIL-STD-810. In 1965, the USAF released a technical report with data and information on the origination and development of natural and induced environmental tests intended for aerospace and ground equipment. By using that document,
540-414: The design engineer obtained a clearer understanding of the interpretation, application, and relationship of environmental testing to military equipment and materiel. The Institute of Environmental Sciences and Technology (IEST), a non-profit technical society, released the publication History and Rationale of MIL-STD-810 to capture the thought process behind the evolution of MIL-STD-810. It also provides
570-986: The environmental worthiness and overall durability of a system design. The standard contains military acquisition program planning and engineering direction to consider the influences that environmental stresses have on equipment throughout all phases of its service life. The document does not impose design or test specifications. Rather, it describes the environmental tailoring process that results in realistic materiel designs and test methods based on materiel system performance requirements. Finally, there are limitations inherent in laboratory testing that make it imperative to use proper engineering judgment to extrapolate laboratory results to results that may be obtained under actual service conditions. In many cases, real-world environmental stresses (singularly or in combination) cannot be duplicated in test laboratories. Therefore, users should not assume that an item that passes laboratory testing also will pass field/fleet verification tests. In 1945,
600-687: The equipment's life cycle to meet user and interoperability needs. Part Two of MIL-STD-810 contains the environmental laboratory test methods to be applied using the test tailoring guidelines described in Part One of the document. With the exception of Test Method 528, these methods are not mandatory, but rather the appropriate method is selected and tailored to generate the most relevant test data possible. Each test method in Part Two contains some environmental data and references, and it identifies particular tailoring opportunities. Each test method supports
630-454: The procedures used in a test. The document for a test method might include: Test methods are often scrutinized for their validity, applicability, and accuracy. It is very important that the scope of the test method be clearly defined, and any aspect included in the scope is shown to be accurate and repeatable through validation. Test method validations often encompass the following considerations: Test method A test method
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#1732793923645660-444: The process of tailoring design and test criteria to the specific environmental conditions an equipment item is likely to encounter during its service life. New appendices support the succinctly presented text of Part One. It describes the tailoring process (i.e., systematically considering detrimental effects that various environmental factors may have on a specific equipment throughout its service life) and applies this process throughout
690-405: The same phrase, but did not elaborate on the subject until MIL-STD-810D was issued marking one of the more significant revisions of the standard with its focus more on shock and vibration tests that closely mirrored real-world operating environments. MIL-STD-810F further defined test methods while continuing the concept of creating test chambers that simulate conditions likely to be encountered during
720-711: The test engineer by describing preferred laboratory test facilities and methodologies. These environmental management and engineering processes can be of enormous value to generate confidence in the environmental worthiness and overall durability of equipment and materiel. Still, the user must recognize that there are limitations inherent in laboratory testing that make it imperative to use engineering judgment when extrapolating from laboratory results to results that may be obtained under actual service conditions. In many cases, real-world environmental stresses (singularly or in combination) cannot be duplicated practically or reliably in test laboratories. Therefore, users should not assume that
750-583: The test result is the dependent variable , the measured response based on the particular conditions of the test or the level of the independent variable . Some tests, however, may involve changing the independent variable to determine the level at which a certain response occurs: in this case, the test result is the independent variable. In software development , engineering , science , manufacturing , and business , its developers, researchers, manufacturers, and related personnel must understand and agree upon methods of obtaining data and making measurements . It
780-583: The test result is the dependent variable , the measured response based on the particular conditions of the test or the level of the independent variable . Some tests, however, may involve changing the independent variable to determine the level at which a certain response occurs: in this case, the test result is the independent variable. In software development , engineering , science , manufacturing , and business , its developers, researchers, manufacturers, and related personnel must understand and agree upon methods of obtaining data and making measurements . It
810-400: The test results. Consumers who require rugged products should verify which test methods that compliance is claimed against and which parameter limits were selected for testing. Also, if some testing was actually done they would have to specify: (i) against which test methods of the standard the compliance is claimed; (ii) to which parameter limits the items were actually tested; and (iii) whether
840-586: The testing was done internally or externally by an independent testing facility. Test method A test method is a method for a test in science or engineering , such as a physical test , chemical test , or statistical test . It is a definitive procedure that produces a test result. In order to ensure accurate and relevant test results, a test method should be "explicit, unambiguous, and experimentally feasible.", as well as effective and reproducible. A test can be considered an observation or experiment that determines one or more characteristics of
870-430: The tests and methods of MIL-STD-810 through Revision G is available on the web and quite useful in comparing the changes among the various revisions . The following table traces the specification's evolution in terms of environmental tailoring to meet a specific user's needs. Part One of MIL-STD-810 describes management, engineering, and technical roles in the environmental design and test tailoring process. It focuses on
900-470: The world. U.S. MIL-STD-810 is a flexible standard that allows users to tailor test methods to fit the application. As a result, a vendor's claims of "...compliance to U.S. MIL-STD-810..." can be misleading, because no commercial organization or agency certifies compliance, commercial vendors can create the test methods or approaches to fit their product. Suppliers can – and some do – take significant latitude with how they test their products, and how they report
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