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ASTMB488 数据表(PDF) 23 Page - ITT Industries |
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ASTMB488 数据表(HTML) 23 Page - ITT Industries |
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23 / 41 page ![]() MIL-DTL-24308G w/AMENDMENT 2 23 4.5.17.1 Printed wiring board connector mounting. Mounting method as specified in 4.5.16.2. 4.5.18 Durability (see 3.5.16). Connectors shall be tested in accordance with test procedure EAI-364-09. The following details apply: a. Mated and unmated 500 times at a rate of 200 ±100 cycles per hour. b. After 500 cycles mated connectors shall be subjected to salt spray. 4.5.19 Salt spray (corrosion) (see 3.5.17). Mated connectors shall be subjected to a salt spray test in accordance with test procedure EIA/ECA-364-26, test condition B. After exposure, connectors shall be thoroughly washed with tap water to remove all salt deposits and then shall be dried in a circulating air oven at temperature of 38°C ±3°C for a period of 12 hours. They shall then be visually examined for evidence of corrosion and subjected to the contact resistance test specified in 4.5.11 and the mating and unmating force test as specified in 4.5.6. 4.5.20 Oversize pin exclusion (see 3.5.18). A hardened steel oversize pin, as specified in 3.5.18, shall be placed in a position centered and parallel to the axis of the socket contact. A 12-ounce axial force shall then be applied tending to force the test pin into the socket contact. After completion of the test, the contacts shall be subjected to the contact resistance test as specified in 4.5.11. This test shall be performed on 20 percent or a minimum of four, of the socket contacts in each connector. 4.5.21 Resistance to test probe damage (see 3.5.19). Socket contacts shall be tested in accordance with test procedure EIA-364-25. The following details shall apply: a. The test shall be performed on 20 percent of the contacts, or a minimum of four contacts. b. After testing, the contacts shall meet the requirements specified in 3.5.19 (contact engagement and separation). c. Type 1 or type 2 contact holding device. d. Probe damage tool shall be inserted into the contact to the following depths: Contact size Holding fixture Type 1 Type 2 20 .202 ±.005, .077 ±.005 .250 ±.005, .125 ±.007 IDC 20 .202 ±.005, .077 ±.005 .250 ±.005, .125 ±.007 e. The diameter of the handle (.190) is not applicable. 4.5.22 Fluid immersion (see 3.5.20). Connectors shall be tested in accordance with test procedure EIA-364-10. The following details apply: a. Test fluid (a). b. Test fluid (d). 4.5.23 Insert retention (see 3.5.21). Unmated connectors shall be tested in accordance with test procedure EIA-364-35: a. Force to be applied: 10 lb/in 2 per second until pressure specified in 3.5.21 is reached. b. For classes D, G, M, and N connectors, the wired contacts may be removed for convenience of testing. |
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