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|  MIL-L-27160 (USAF)
3.3.8 Knobs and lettering. Unless otherwise specified in the applicable instrument
specification, all indicia associated with instrument knob positions and all lettering on the
instrument face shall be illuminated. The brightness range shall be as specified herein.
3.4 Indicia. The presentation may be combination of white, black, and gray as specified in
the applicable instrument specification. Unless otherwise specified in the applicable
instrument specification, the colors shall conform to Table I.
Table I. Colors
Color
Color No. as listed in
FED-STD-595
White
37875
Black
37038
Gray
36440
3.5 Contrast. Contrast between the white and black portions of the indicator scale shall
be 12 or greater. Contrast between the gray and black portions of the indicator scale shall
be five or greater. Contrast, C, is defined as:
C = B2 - B1
B1
Where: B2 is the brightness of the gray or white, and B1 is the brightness of the black
portions of the instrument scales.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase
order, the supplier is responsible for the performance of all inspection requirements as
specified herein. Except as otherwise specified in the contract or order, the supplier may
use his own or any other facilities suitable for the performance of the inspection
requirements specified herein, unless disapproved by the Government. The Government
reserves the right to perform any of the inspections set forth in the specification where
such inspections are deemed necessary to assure supplies and services conform to
prescribed requirements.
4.2 Classification of tests. The inspection and testing of systems shall be classified as
follows:
a. Qualification or preproduction tests as specified in the applicable instrument
specification.
b. Quality conformance tests.
4
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