4.5 there shall be no temperature or humidity conditioning other than that re-
quired by the individual environmental test and the insulation resistance shall
then be 20 megohms minimum. The test potential shall be 500 plus or minus 50
volts DC. The insulation resistance shall be measured between the following mut-
ually insulated points:
b. Each of the three independent normally closed circuits.
3. 3.2 Electrical continuity and circuit resistance. The three independent,
normally closed circuits shaI1 be continuous and each individual circuit resis-
tance shall be less than O. 10 ohm.
3. 3.3 Function. The switch shall maintain electrical continuity of the three
independent circuits at temperatures less than plus 165 degrees F and shall break
continuity of these circuits within 12 minutes at a temperature of plus 240 de-
grees F. After interrupting the circuits, the switch shall maintain all circuits
permanently open without electrical continuity under the conditions specified
in 4.6. 2.3.3.
3.4 Environmental requirements, Unless otherwise specified, the switch
shall be capable of conforming to the performance and product characteristics
of this specification after being exposed to the environments and all conditions
3.4.1. 1 storage condition. The switch shall withstand temperatures from
minus [i.; (o plus 160 degrees F.
3. 4.2. I Standby condition. The switch shall withstand vibration as speci-
fied for Type 1 equipment in MIL-STD- 167 up to 25 cycles per second (cps).
:j*q*~*~ Operating condition. The switch shall withstand vibration through
a frequency range of 20 to 2000 cps at O. 10-inch double amplitude or I0g (g
unit of gravitational acceleration), whichever is less, The switch circuits shall
remain closed during vibration and thereafter the switch shall meet the perfor-
mance and product characteristics of this specification.
3.4.3 1 Standby condition. The switch shall withstand shocks of 40g peak
magnitude. The shock shall have a pulse shape approximate ing a one-half sine
wave having a duration of 5 milliseconds.
22.214.171.124 Operating condition.
3.4.3. 2.1 Major. The switch shall withstand a shock of 2400g peak magni-
tude in the direction shown in Figure 1. The shock shall have a pulse shape ap-
proximating a one-half sine wave having a duration of 1 millisecond. Thereafter
the switch shall meet the performance and product characteristics of this specifi-
cation, except for the functional requirement of 3.3.3.