MIL-PRF-22885/87C
Luminance: Shall be in accordance with MIL-PRF-22885/12. Brightness is reduced by approximately
50 percent when EMI screen is installed.
Color filters: Shall be in accordance with MIL-PRF-22885/12.
Mounting flange: Front face of the mounting flange shall be corrosion resistant steel with a natural
lusterless finish.
Lamp module locking device: Shall be provided to prevent lamp module from moving from its normal
(ready to operate) position during high shock.
Plunger stop: Design optional. Shall be readily adjustable or resolvable in the field without the need of
special tools. Plunger stop shall be removed when switching action is required when indicator module is
coupled to a switch assembly.
Plunger stop test: With the plunger stop functionally installed on the indicator module and the module
mounted by its normal mounting means, a static force of 25 pounds shall be applied to the legend plate
for 1 minute. The plunger stop shall restrict normal actuator travel.
Thermoplastic material: Shall be selected to meet the performance requirements of this document.
Marking: Color filter symbols shall not appear in the PIN marked on the items, but may be marked on
shipping containers.
Shock:
Method I: There shall be no opening of closed contacts or closing of open contacts in excess of 10
microseconds for momentary action switches and 10 milliseconds for alternate action switches.
Method II: There shall be no opening of closed contacts or closing of open contacts in excess of 40
milliseconds. The standard mounting fixture shown in method 207 of MIL-STD-202 shall be used.
EMI shielding: When specified (see table III), indicators shall be equipped with a fine mesh EMI screen
installed between the lamps and diffuser, making electrical contact to the indicator light's housing. The
screen to housing resistance shall not exceed 1 ohm through one complete cycle of operation with full
overtravel. Test in accordance with the following:
a. Test current: 100 10 milliamperes.
b. Open circuit test voltage 6 1 V dc.
c. Before and after electrical endurance in qualification and group C testing.
PIN: M22885/87- (and two-digit alpha-numeric dash number from tables II and III. Add color filter
symbols when required). For direct Government stocking, do not use color filter symbols, color filter
should be acquired separately.
6