1 Downloaded from https://www.everyspec.com MIL-STD-810D 19 July ’1983 I components. .. e. Changes in performance of transformers and electromechanical f. Stiffening of shock mounts. .,. grains, such as ammonium ! & “Cracking of explosive solid pellets or nitrate. I h. Cracking and crazing, embrittlement, change in impact strength, and reduced strength. i: Static fatigue of restrained glass. ,.; j.. Condensation and freezing of water. k. Decrease in dexterity, hearing, and vision of personnel wearing protective clothing. , 1. Change of burning rates. I-3 S AND ~ NOTE: This teat method should be applied at the end of the tailoring process described in aeotion 4 of this standard. a.
This method ia used when the teat item is likely to be dep10yed in a low-temperature environment during ita life cycle and the effects of low temperature have not been determined during other teats (such as the temperature-altitudetest). b. ~. This method is not intended for testing equipment to be installed in and operated in aircraft, since such equipment would usually be tested aacording to method 520. C. ~. (See General Requirements, 4.4;4.) Becauae this test (except for the physical manipulation procedure) is less likely to permanently damage the test item, it is normally scheduled early in the test sequence.
This teat may significantly alter the performance of aeala during the low-” preaaure testing of 500.2. d. This method is composed of three low-temperature subtests: Procedures I &itorage), II (Operation), and III (Manipulation). Before the.tests are conducted, a choice of one or.more test procedures must be made. In addition, the variablea for each test must be determined. ‘(1) The choice of test procedure(a) depends on the likelihood of the test item being: (a) Opefated~ at low temperatures. ,, 1/ Operation is the excitation of the test item with a minimum of contact by personnel. It does not include handling (manipulation). METHOD 502.2 19 July 1983 502.2-2