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|  MIL-S-1399E(AR)
4.5.1.5 Cotton. Ten g. of cotton shall be accurately weighed
and placed in a tared weighing dish. The dish and contents shall be
weighed and placed in an oven and dried at 100 + 2C for 2 hours.
The dish and contents shall be cooled in a desiccator and weighed.
The loss in weight shall be calculated as percent moisture in the
sample.
4.5.2 Transportation vibration. The signal assemblies selected
as specified in 4.4.3.2.1 or 4.4.3.2.2 shall be packaged and packed
in accordance with dwg. 8836949 and 8836950. Each packed box shall
be subjected to the transportation-vibration test as specified in
MIL-STD-331, except that each box shall be vibrated at the specified
amplitudes for four (4) hours in each of three different positions
(i.e. box positioned so that signal assemblies are vertical with
base end down, box positioned so that signal assemblies are
horizontal, and box positioned so that the signal assemblies are
vertical with base end up). After the test, the box packing and the
signal assemblies shall be examined to determine compliance with the
requirements.
4.5.3 Functioning. The signal shall be immersed to a depth
between 6 and 9 inches for 2 hours, in water maintained at 70
10%?. At the end of the immersion time, the signals shall be
removed from the water and the exterior surfaces wiped dry. The
signals shall be fired in a pistol, for which the signal is
standard, that is mounted on a tower platform, at a min. height of
100 feet above the ground. The signal functioning shall be observed
for compliance with the requirements. Any signal which fails to
conform to the applicable requirements shall be classed defective.
4.5.3.1 Test Validity. If for any reason the test conditions
have detrimentally affected the test results, the test shall be
declared invalid and a new test shall be performed with additional
samples.
4.5.4 Air leakage test. The signal assembly shall be placed in
a cylindrical air tight chamber with the free space minimized. The
air pressure within the chamber shall be raised-to a min. of 3
p.s.i.g. by means of a fixed volume of air. With the air supply
shut off the pressure shall be maintained for 15 seconds min. An
accurate pressure measuring instrument shall be observed for
evidence of signal leakage.
4.5.5 Static test of star assembly and tracer assembly. The
assembly shall be supported in a horizontal position with the axis
of the assembly perpendicular to the photometric axis. The assembly
shall be ignited with a quickmatch, and the candlepower and color
30
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