Downloaded from https://www.everyspec.com MIL-STD-810D 19 July 1983 4.2.2.4 Ooerational Environmenta 1 Ver~on P . . . la~. This document shall include plans for obtaining data on actual operating or field environments to which the test item will be ‘exposed,for comparison with design and test criteria. It will provide the basis for the analysis of the adequacy of the ‘erivironmentalprogram. The Operational Environmental Verification Plan shall be documented according to DID DI-R-7126. ,. 4.3 ~. Field data used in these methods should meet all of the following: a. -merit slmllari . . tv.
Whenever practical, measurements shall be made on (a copy of) the test item or on the same platform type as that which will carry the equipment to be tested. This ideal situation is often unattainable early in the development of new equipment. Therefore, it is sometimes necessary to derive data ,fromappropriately similar equiPment Or carrYinR platforms. Under such circumatancea, exact equivalence shall not be expected or required. It is important to note that equipment may be functionally , dissimilar and still be considered aa similar for evaluating ‘environmental stress conditions. ,,, b. Mta au-.
The following minimum standards should be satiafied before field lata ia considered suitable for substitution into the test procedures, Supporting information should include: (1) A description of the equipment or the carrying platform. (2) The location on the hardware or carrying platform at which the measurements were made. (3) The environmental and operating conditions under which the measurements were ade. (U) The type and calibration status of data recording and analysis equipment and inatrumentation. In addition, the measured data should.be analyzed and formatted to be compatible with the specific test procedure for which it is being considered. c. Rata man tity.
Sufficient data is needed to adequately describe the conditions being evaluated, but the requirement for sufficiency will vary with the environmental conditions, physical and performance characteristics of the hardware type, and program needs, Consideration shall be given to: (1) The number and nature of the data measurement pointa. (2) The number and scope of triala conducted to record data. Some when engineering judgement may be required to asseas the applicability of data constraints limit the number and location of measurement points. 4.4 Tes t c~. . . Unless otherwise specified herein or in the equipment specification, measurements and teata shall be made at the following conditions: 9