MIL-STD-1901A
4.11.2 Visual indication. If visual indication of the non-armed or armed condition is employed in the ISD, visible indicators shall be designed to provide a positive, unambiguous indication of condition. Indicator failure shall not result in a false non-armed indication. If color-coding is used to represent condition, the colors and coding shall be as follows:
a. Non-armed condition. Fluorescent green background with the letter S or word
SAFE superimposed thereon in white. Colors shall be non-specular.
b. Armed condition. Fluorescent red or fluorescent orange background with the letter A or the word ARMED superimposed thereon in black. Colors shall be non- specular.
c. Suggested color specification.
(1) Fluorescent green, Color No. 38901 per FED-STD-595 (2) Fluorescent red, Color No. 38905 per FED-STD-595.
(3) Fluorescent orange, Color No. 38903 per FED-STD-595.
4.11.3 Electrical firing energy dissipation. Ignition Systems and Ignition Safety Devices accumulating and/or storing functioning energy (e.g., firing capacitors) shall dissipate the firing energy within 60 seconds whenever the arming signal is removed.
The dissipation means shall be designed to prevent single point and common mode failures.
4.12 Design for Quality Control, Inspection and Maintenance
a. The IS and ISD shall be designed and documented to facilitate application of effective quality control and inspection procedures. Design characteristics critical to safety shall be identified to assure that the designed safety is maintained.
b. The design of the IS and ISD shall facilitate the use of inspection and test equipment for monitoring all characteristics which assure the safety and intended functioning of the IS at all appropriate stages. The IS and ISD designs should facilitate the use of automatic inspection equipment.
c. Embedded computing systems and their associate software (firmware) shall be designed and documented for ease of future maintenance. Software development shall be in accordance with accepted high quality software development procedures, such as
DOD-STD-498.
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