MIL-PRF-22885/101E
Operation: A (momentary action), E (alternate action, position indicating), or H (indicator light only).
Operating characteristics:
Actuation force: 5 pounds (22.2 N) maximum.
Actuation travel: .130 ±.030 inch (3.3 ±0.76 mm).
Pushbutton extraction force: 2 to 5 pounds (8.9 to 22.2 N).
Shock: 75 G (MIL-STD-202, method 213, test condition B).
Electrical endurance: See tables I and II for electrical load conditions. Following electrical endurance, contact
resistance is not applicable for switches which are tested at the rated inductive load.
Low level life: Applicable for gold contact switches. 50,000 cycles.
EMI/RFI shielding: When applicable, switches shall meet either the shielding efficiency or positive grounding test
requirements of MIL-PRF-22885, except the screen to mounting surface resistance shall not exceed 3 ohms.
Sunlight readability: Applicable to display type S switches, see table VIII. Units shall be tested for φ1 = 45° and
φ2 = 0° only. This procedure does not test readability under specularly reflective (glare) condition. The average
contrast ratio of each lighted legend character to the background shall be 0.6 minimum for standard colors and 0.4
minimum for NVIS compatible colors. In the unlighted legend condition, the average contrast ratio of each legend
character to the background shall have an absolute value less than or equal to 0.1. The legend used for testing
shall have a character height of approximately 0.09 to 0.1 inch. The stroke width shall be characteristic of each
manufacturer's standard military product.
Night vision imaging system (NVIS) compatibility: Applicable to NVIS color displays. The night vision goggle
compatible feature, when specified for type S displays, is in addition to the sunlight readable feature and all
minimum sunlight readable requirements shall be maintained on all type S displays along with the unique
requirements for night vision goggle compatibility.
Color and luminance: See tables III and IV.
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