MIL-PRF-28876E
3.13.2 External bending moment (connectors with backshells only). When
tested in accordance with 4.6.5.2, connectors and backshells shall exhibit no
visible evidence of damage that may degrade their ability to perform as
specified (see 3.1).
3.13.3 Cable seal flexing. When tested in accordance with 4.6.5.3,
connector strain relief mechanisms shall prevent loss of environmental sealing
or other damage which may impair the connector operation.
3.13.4 Twist. When tested in accordance with 4.6.5.4, connector seals
shall not be rendered inoperable nor shall any other connector damage occur.
The change in optical transmittance attributable to the connector shall be
less than 0.5 dB during and after the test.
3.13.5 Mating durability. When tested in accordance with 4.6.5.5, mating
connectors shall show no evidence of mechanical defects detrimental to
connector operation. The connector shall meet the requirements of 3.11.4
during and after the test.
3.13.6 Impact. When tested in accordance with 4.6.5.6, connectors shall
not be visibly damaged or otherwise rendered unfit for operational use. The
requirements of 3.11.4 shall be met after the test.
3.13.7 Crush. When tested in accordance with 4.6.5.7, connectors shall
show no evidence of inability to mate or unmate, broken parts, loss of optical
continuity, or damage to shells, backshells, or dust covers. The requirements
of 3.11.4 shall be met during and after the test.
3.14
Environmental requirements.
3.14.1 Temperature ranges. The connectors shall meet all requirements
specified (see 3.1), during the specified operating environments and after the
specified storage environments.
The operating temperature range and storage
temperature range shall be as shown in table IV, as specified (see 3.1).
TABLE IV.
Temperature ranges.
Operating
Storage extremes
Non-operating
extremes (°C)
extremes (°C)
(°C)
-28 to +65
-40 to +70
-40 to +70
3.14.2 Thermal shock. When tested in accordance with 4.6.6.1, connectors
shall show no evidence of mechanical damage, loosening of component parts,
separation of bonded surfaces, or other damage detrimental to the operation of
the connector. The connector shall meet the requirements of 3.11.4 after the
test.
3.14.3 Temperature/humidity cycling. When tested in accordance with
4.6.6.2, connector parts shall not swell or otherwise degrade such that
connector performance is impaired. The requirements of 3.11.4 shall be met
during and after the test.
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