MIL-DTL-83526C
4.9.28 Freezing water immersion (see 3.11.28). Mated connector assemblies shall be tested in
accordance with method A, procedure 1 of EIA/TIA-455-98 with the following exception, use mated
connector assemblies instead of continuous cable. The size of the water vessel shall be such that, when
the mated connectors are placed in the vessel, the connectors are within 150 mm of the sides and bottom
of the vessel, and within 150 mm of the surface of the water. The change in optical transmittance shall be
monitored during and after the test in accordance with 4.8.5. At the completion of the test, the connectors
shall be visually examined in accordance with 4.9.32. For exposure at -10 °C, the water is considered
completely frozen when the water temperature reading is less than -1°C. The connector assemblies shall
be externally cleaned, unmated, examined for water penetration into the connector, mated and optically
tested for insertion loss in accordance with limits in 3.10.1.
4.9.29 Sand and dust (see 3.11.29). Mated cable connector assemblies shall be tested in accordance
with EIA/TIA-455-35 except as noted herein. Each connector shall be oriented in the chamber such that
the coupling mechanism is in line with the oncoming air flow. The connectors shall be affixed in such a
manner that the orientation of the connector does not change throughout the duration of the test. The 16
hour holding period of step 5.5 is not required. Step 5.6 may proceed immediately after reaching
temperature stabilization. The change in optical transmittance shall be measured before the dust test,
during the 6 hour exposure period of step 5.4, before step 5.6, during the 6 hour exposure period of step
5.6, and after the test. The connector coupling force and coupling torque (see 4.9.11 and 4.9.12) shall be
measured after the test. The connector shall be visually examined in accordance with 4.9.32, after
cleaning, at the conclusion of the test.
4.9.30 Ozone exposure (see 3.11.30). Mated cable-connector assemblies shall be tested in
accordance with TIA-455-189. After test exposure, the assemblies shall be examined for damage.
4.9.31 Flammability (see 3.11.31). Mated and unmated cable-connector assemblies shall be tested in
accordance with EIA-364-81 and as specified herein. Mated assemblies shall be exposed to a 0.75 inch
(19 mm) flame height applied for ten seconds to the region of the mated pair interface. The change in
optical transmittance shall be measured during the test, and after the test once the test sample has
returned to room temperature (see 4.8.5). The sample shall then be demated, and the unmated
connector assembly with backshell and dust cover exposed to a 1.50 inch (38.1 mm) flame height applied
for 60 seconds to the backshell-cable interface region. For connectors with dielectric inserts, the
connector samples shall be exposed to a third flame, with a one and one-half inch flame height. The
connector samples shall be remated and the flame shall be applied for 60 seconds to the region of the
mated pair interface.
4.9.32 Visual examination. Each connector shall be visually examined in accordance with TIA/EIA-
455-13. Attention shall be given to those assemblies that require a gasket to determine the condition of
the gasket. Gaskets missing, twisted, buckled, kinked, or damaged in any way shall be cause for
rejection. Each connector shall be visually inspected for the presence of compound between fiber
termination end of insert and shell. Examinations shall include the following:
a) Workmanship meets the requirements of 3.13.
specification sheet (see 3.1).
d) Backshell accessories meet the requirements of 3.6 and the appropriate specification sheet (see
3.1).
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