Downloaded from https://www.everyspec.com MIL-STD-322B 20 March 1984 are contained in ARO-D-63-2 Report, pgs. 146-165 (see 2.2b) and in ARO-74-1 Report, pgs. 369-386, as revised in May 1978 (see .2.2c). Other ’levels (O%, “no-fire”; and 100%, “all-fire”) may be extrapolated from the test data after subjected to statistical computer analysis. The 5,0%firing level (the mean) and the standard deviation about the mean along with the .“all-fire” and “no-fire” levels so extrapolated shall be recorded in FigurE~8 (see also Appendices A & B). 5.1.2 Reliability of functioning.
Standard firing fixtures which will permit efficient transfer of input energy and allow for means of measuring out- put shall be used. Output measurements shall be made by using Test 301 (steel dent), 302 (lead disc), or 303 (aluminum.dent) in MIL-STD-331. An electrical input’ source as specified in Electric Initiator Handbook (see 2.2d) shall be used to furnish the appropriate’ pulse at the ambient condition. Test results shall be recorded as indicated in Figure 8. J 5.1.3 Reliability of non–functioning.
Standard firing fixtures which will permit efficient transfer of input energy and an electrical input source as speci- fied in Electric Initiator Handbook (see 2.2d) shall be used to furnish the appro- priate “no-fire” pulse at the ambient condition. Test results shall be recorded as indicated in Figure 8. 5.1.4 High temperature storage. Conditioning equipment shall include a cabinet capable of maintaining a constant temperature of 160”F ~ 3°F (71°C * 2“C) for intervals up to 12 weeks. Testing” equipment (including firing fixture, input ( - source, output measuring devices, etc.) shall be as those used for the sensitiv- ity test of 4.1.1.
Selection of the input stimulus to be used shall be dependent upon the specific application of the item (sample) under development, i.e. , either constant current, constant voltage, or capacitor discharge. The method of deter– mination shall either be a Bruceton or an OSTR with its corresponding sampling 1 size. 5.1.4.1 Bruceton method, storage. Three hundred samples shall be stored in the conditioning cabinet maintained at the specified temperature. After intervals of 4 weeks (28 days), 8 weeks, and 12 weeks, 100 samples each shall be withdrawn and tested, using this method (see 5.1.1.1).
Based on results obtained, calculations of the mean (50%) firing level of the selected stimulus and the standard deviation about the mean shall be made and recorded as Figure 8. ~ I 5.1.4.2 OSTR method, storage. Sixty samples shall be stored in the condi- tioning cabinet maintained at the specified temperature. After intervals of 4 weeks (28 days), 8 weeks, and 12 weeks, 20 samples each shall be withdrawn and tested, using this method (see 5.1.1.2). Based on results obtained, calcu- I lations of the mean (50%) firing level of the selected stimulus and the standard deviation about the mean shall be made and recorded as in Figure 8. I 5.1.5 Functioning tests at extreme temperatures.
Cabinets used to condi- tion the samples shall maintain the prescribed temperature within * 3°F @ 2°C). , I L 6,