MIL-DTL-83526C
TABLE VII. Measurement frequency.
Test duration (hrs.)
Time(s) after start of test (hrs.)
4 and less
Half way through
More than 4 to 6
1/3 and 2/3 of the way through the test
More than 6
¼, ½, and ¾ of the way through the test
4.8.6 Return loss (see 3.10.6). The return loss shall be measured in accordance with
TIA/EIA-455-107.
4.8.7 Ambient light susceptibility (see 3.10.7). The optical connector shall be tested in accordance
with TIA-455-22. The optical termini of the connector shall be either opaquely capped or connected to a
minimum of 4 meters of optical test cables as appropriate. The far ends of these cables shall be either
capped or connected to suitable optical power monitoring instruments. The light shall be broad spectrum
with infrared, visible, and ultraviolet components and shall illuminate the connector with an irradiance
(power density) of 112 ±5 milliwatts per square centimeter. Light emitting from each optical part of the
device under test shall be measured by optical power monitoring equipment, having a broad spectral
response compatible with the source.
4.9 Inspection methods.
4.9.1 Size. Each of the dimensions specified (see 3.1) for the connector, backshell, and accessory
parts shall be measured using calibrated measuring devices with the precision and accuracy appropriate
4.9.2 Weight. The connector, backshell and accessories shall be weighed using calibrated scales
having the range, precision and accuracy appropriate for the tolerances specified (see 3.1 and 3.11.2).
4.9.3 Color. The colors of connectors, backshells, and accessories shall be nonreflective (see
3.11.3).
4.9.4 Identification marking. Identification markings on connectors, backshells and accessory parts
shall be visually examined and measured for conformance with the requirements of 3.11.4.
4.9.5 Terminus cleaning (see 3.11.5). The optical face of each terminus shall be cleaned according to
the instructions supplied by the connector manufacturer. The terminus shall not be removed from its
operational position within the connector to facilitate cleaning.
4.9.6 Insert retention axial strength (see 3.11.6). Unmated connector samples shall be tested as
follows. The pressure shall be applied as specified (see 3.11.6) and the axial displacement measured
(see 3.11.6). The same pressure shall then be applied on the opposite face. Termini positions within the
insert may be either empty or filled during the test.
4.9.7 Insert retention radial strength (see 3.11.7). Unmated connector samples shall be tested where
specified (see 3.1), for radial strength as described herein. Counterpart test devices for connector shall
be supplied by the connector manufacturer, which are capable of applying radial torque forces between
the insert and its shell body. Outermost termini positions or other means may be used for application of
these torques, however, no damage shall occur to the insert as a result of the test exposure. A radial
torque shall be applied as specified (see 3.1).
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