Downloaded from https://www.everyspec.com MIL-STD-322B 20 March 1984 I 4.1.1, Sensitivity to initiation. Sensitivity tests .shall be conducted at ambient condition to determine explosive sensitivity to initiation at con- stant current, constant voltage, and capacitor discharge. There is no criterion for passing the tests. Information obtained shall be used to determine the 50 percent firing point, the standard deviation about the point, and the “all-fire” and “no-fire” levels of the ‘various input stimuli. 4.1.2 ,Reliability of functioning.
The reliability of functioning for the samples shall be at least 0.99 with an 85 percent confidence level when tested at a predetermined “all-fire” input. Depending on the intended application of the samples, the “all-f,ire” input stimulus shall.either be the level at constant current, constant voltage, or capacitor discharge, as determined by the sensi- tivity tests of 4.1.1. The criterion for passing the test is that no more than one failure occurs or no more than one sample fails to meet the output require- ment when testing 385 samples, or that 230 consecutive samples function without a failure.
In accordance with statistical tables based on the Poisson distri- but ion, this will meet the given reliability and confidence level (see Table I). 4.1.3 Reliability of non-functioning. The reliability of non-functioning for the samples shall be at least 0.99 with an 85 percent confidence level when tested at a predetermined “no-fire” input. Depending on the intended application of the sample’s, the “no-fire” input stimulus shall either be the level at constant current, constant voltage, or capacitor discharge, as determined by the sensitivity tests of 4.1.1.
The criterion for passing the tests is that no more than one sam- ple functions when 385 samples are tested, or that 230 consecutive samples do not function. In accordance with statistical tables based on the Poisson distribution, this will meet the given reliability and confidence level. 4.1.4 High temperature storage. Samples shall be stored at an elevated temperature for various intervals and, after removal from storage, tested at ambient to determine if any shift has occurred in the selected 50 percent firing level as determined by the sensitivity tests conducted in accordance with 5.1.1 by using either the Bruceton or the OSTR method.
There is no passing criterion for this storage test; the test result only indicates the effect of high tempera- ture storage on explosive sensitivity. f 4.1.5 Functioning tests at extreme temperatures. Seventy–five samples are conditioned at -65°F (-54”C) and seventy-five at 160°F (72°C), then tested for functioning and output by application of a predetermined “all-fire” electrical input from the results of the Bruceton or the OSTR tests conducted in accordance with 4.1.1, Sensitivity to Initiation.
The criterion for passing the test is that all samples shall function and meet the output when tested as outlined in ,4.1.2 and 5.1.2, using the same “all-fire” input stimulus as for the reliability tests. 4.1~6 Sensitivity to static electricity. This test is designed to simulate the maximum ‘static discharge that can be transferred from a human body to the sample at ambient condition. 7 shall be used to provide a , Equipment equivalent to that shown in Figures 6 and 25,000 t 2 percent volt input from a 500 * 5 percent 3