Downloaded from https://www.everyspec.com MIL-STD-81OD 19 July 1983 Step 5. Measure and document any free water inside the test item. Step 6. Conduct an operational check of the test item as specified test plan, and document the results. II-3.3 &ocedure III - Ha ertiahtness t Step 1. Install the test item.in the test facility with all doors, louvers, etc., cloeed. Step 2. Position the nozzles as required by the test plan or as indicated in 11-1.le. . Step 3. Spray all exposed surfaces of the test item with water for not less”than 40 minutes per face. .- After each 40-minute spray period, inspect the interior of the test item for evidence of free water.
Estimate its volume and the probable point of entry and document. Step 4. SteD 6. Conduct an operational check of the test item as aDeCified in the test Step 5. Visually inspect the test item for evidence of water penetration,, plan, and document the results. 11-4 a. Previous test methods to which the test item has been subjected, b. Results of each performance check and visual photographs, if applicable). examination (and. (1) Pretest. (2) During test. (3) Post-test. ,, c. Length of time required for each performance check. d. Status of the test item for each visual examination. e. Exposure durations. . f. Rainfall rate. g. Wind velocity. h. Water and test item temperatures. i.
Water preseure (if applicable). j. Surfaces of the test item eubjected to rainfall. EETHOD 506.2 19 July 1983 506.2-12