Downloaded from https://www.everyspec.com MIL-STD-810D 19.July 1983 f. The desired humidity shall be generated by using steam or water having nit less than 500,000 ohms resistance. @ (1) Live steam ehall not be injected directly into the test chamber working epace where it may have an adverse effect on the test”item and micro- bial activity. (2) Rust or corrosive contaminants shall not be imposed on the test item by the test facility. g. Unless otherwise specified: ,. . (1) All reagents shall conform “tothe specifications of the Committee on Analytical Reagents of the American Chemical’Society, where such epecifications are available. .
(2) References tc water shall be understood to mean diitilled water or water of equal purity. ,, 11-1.3 ~. Every case of an interrupted test’shall be examined individually in accordance with General Requirements, 4.5.4. Any deviation from this pclicy ehall be explained in the test report. The fungus test, unlike other environmental tests, invclves living organisme. If the test is interrupted, the fact that live organisms are involved must be considered. a. If the interruption occurs during the first seven days of the test, the test should be restarted from the beginning with a new test item or a cleaned test item. o b.
If the interruption occurs late in the test cycle, examine the test item for evidence of fungal growth. If the teet item ie biosusceptible, there is no need for a retest. If there is no evidence of fungal groyth, follow the guidance given below. ,,, (1) Lpwered teMD~. A lowering of the test chamber temperature generally will retard fungal growth. If there is no evidence of mycological deterioration and the relative humidity has been maintained, reestablish the test conditions and continue the teet from the point where the temperature fell below the prescribed tolerances. .(~).EL&fated temDeratur~ Elevated temperatures may have a drastic effect On’’fUngal gPDWth.
A comple~e reinitiation of the test is required if:,“, ,. ., ,. ,.. . . (a) The temperature exceeds 400C (104DF), or (b) The temperature exceeds 31° C (880F) for 4 hours or more,’or (c) There is evidence of deterioration of the fungal cclcniea cn th”econtrol strips, or .,. , ... METHOD 508.“j’ 19 July 1983 508.3-8