. Downloaded from https://www.everyspec.com MIL-STD-810D 19 July 1983 0. Disturbance of any fungal growth must be kept to a minimum during ths operational oheokout. d. Human faotors effeote must be evaluated. ., I-4.2 ~ . . . -. a. This method is designed to provide optimal olimatic conditions and all of the basic inorganic minerala needed for growth of the ~ngal. species used in the test. The grOUp of fungal apeciea was chosen’for ite ability to attack a wide variety of.materialg,oommonlyused in the construction of military equipment. Optional speoiee may be added to the inoculum if required (aee I-3.3). b.
This test muet be performed by trained personnel at laboratories apeoially equipped for microbiological work. ,- ,. c. The test.temperature and h&d.dity cycle selected for thie teat involves a 5oC drop in temperature to allow moist.air go eriterthe test item (breathing effeot) and the moisture to oondense onto or In the.internal components, thue simulating an outdoor diurnal cycle. ,. ..’ ,, d. The presenoe of moisture ie essential for spore germination and growth. Generally, germination and growth’will start when the relative humidity of the ambient air.exceeds 70%.
Development will become progressively more rapid as the humidity rlaes above this value, reaching a maximum in the 90 to 100s relative humidity range. e. The specified temperature rangei 24° to 31° C (75° to 88%), is most conduoive to the growth of ,thetest fungi. f. Control items specified in II-3 are designed to: . (1) Verify the viability of the fungal spores used in the inoculum. (2) Establish the editability of the chamber environment to support growth. fungal rv of test inf~. The following information ie required in the test plan for the adequate conduct I-4.3 of the ~eata of section II: . a. Teat item configuration. b. Teet duration. c.
Optional pre- and post-teat operational requirements. . d. Additional guidelines. I-5 ~ a. AT70-38,”I&swrs& Deve~ Test and ~, Chapter 2, Climatio Criteria. b. MIL-STD-21O, ~ for ~. 508.3-5 METHOD 508.3 19July 1983 .