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Requirements
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Scales, Graphical Firing, General Specifications For
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First Article Provisions



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MIL-S-64045 (AR)
3.5 Environmental.
3.5.1 Storage  Temperatures. The scales shall meet the
requirements of 3.6 when thermally stabilized at the standard
ambient temperature of between 60 and 90F after having been
exposed to and thermally stabilized at ambient temperature of
0
-80 and  +160F.
Temperatures. The scales shall meet the
3.5.2 Operating
requirements of 3.11 when exposed to and thermally stabilized at
0
0
ambient temperatures of -40 and +150 F.
3.5.3 Humidity.
The scales shall meet the humidity
requirements of MIL-STD-810, Procedure IV. The scalels shall then
be thermally stabilized after return to the standard ambient
0
0
temperature of between 60 and 90 F, and Shall meet the
requirements  of  3.6.
3.6 Post-Environmental. Subsequent to the temperature and
humidity tests specified in 3.5.1 and 3.5.3 the scales shall be
operable and shall show no color changes, distortion, warpage,
breaks, stickiness, cracks, mottling, or separation of bonded
materials; and the scales shall meet all of the requirements of
3.7 to 3.11 inclusive.
3.7 Printing  and  surface  quality. Letters and numbers shall
be in accordance with the applicable drawings. They shall be
sharp, evenly colored, without skips or breaks, and shall not
touch each other or any line of the scale. The printing surface
shall be free from stains or imperfections.
3.8 Scales. All scales shall be printed in the colors noted
on pertinent drawings. The graduations shall be accurately
placed so that error will not affect result of camputations listed
in 3.10 in excess of the tolerances indicated.
3.9 "C" and "D" SCALES GRADUATION ERRORS - Type 2 scales.
3.9.1 With the first graduation of the "C" scale in
coincidence with the first graduation of the "D" scale, each
succeeding graduation on the "C" scale shall be in alignment with
the respective graduation on the "D" scale within 0.005 inch.
3.9.2 A 2/3 ratio between graduations on the "C" and "D"
scales shall be read throughout the scale within the tolerance
indicated in 3.9.1 when the first graduation on the "C" scale is
set in coincidence with the 1.5 graduation on the "D" scale.
3.10 Accuracy
3

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