Downloaded from https://www.everyspec.com ‘M1.l, -axu-o!Uu 19”July “198> i. Loosening of particles or parts that may become lodged ,.incircuits or mechanisms. j. Excessive electrical noise. I-3 PROCEW8ES AND ~. This test method should be applied at the end ‘ofthe tailoring process described in section 4 of this standard. a. tion. This method is intended for all types of military equipment’except as noted in the foreword to this standard. :. ,, b. Iiestr ictio~. None. ,,., .,. .!, .: c. SQiwlQeJ Vibration testing may be p~rformed:“anytimein the ‘testprogram.
The accumulated effects of vibration-induced stress may affect equipment performance under other environmental conditions, s,uch as temperature, altitude, humidity~ leakage or EMI/EMC. When it is desired to evaluate the cumulative environmental effects of vibration and other erivironments,a single test item should be exposed to all environmental conditions, with vibration testing generally perfo~med’.fir~t. . . . . d. Test varlat-. . . ,1 ., (1) Test “apparatus. !+,:,. ,. ... -. :. (2) Test item configuration. ., (3) On/off state of test item: .I (4) Vibration spectrum and intensity. (5) Duration Of exposure. f (6) Axes of exposure. (7) Location of accelerometers.
, - I-3.1 Mice of teSt orocedurea. The choice of testi“procedureis ‘governedby the vibration environments to be tested for. These environments should all be identified during the part of the tailoring.process ‘deacribed~iii4:2.2.2 of General Requirements. \ ,.. Table 514.3-I divides vibration environments into twelve categor,ies--three transportation-inducedand nine application-induced.’”’ Procedure‘I i“sused for testing an item to nine of these categories. Procedures II, III, and IV are each used for one of the three remaining categories. METHOD 514.3 19, July 1983 514.3-2 .