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MIL-A-48449A(AR)
3.8
Environmental
service
conditions.
3.8.1  Storage  temperature.
The  alignment  device  shall  be
capable  of  withstanding  temperature  stabilization  at  +160F
(71C) and -50F (-46C) for a period of 4 hours at each
Subsequent  to  return  to  standard  ambient
temperature
extreme.
temperature,  the  alignment  device  shall  not  have  been  damaged  or
adversely  affected  and  shall  meet  the  requirements  of  3.9  (see
4.6.2).
Operating  temperature.
3.8.2
Unless  otherwise  specified,
the  alignment  device  shall  meet  the  requirements  of  3.9.6.2  while
thermally  stabilized  at  temperatures  of  +150F  (66C)  and
-40F  (-40C).
Subsequent  to  return  to  room  temperature,
the  alignment  device  shall  not  have  been  damaged  or  adversely
affected  and  shall  meet  the  requirements  of  3.9  (see  4.6.3).
The  alignment  device  in  its  Carrying  Case  (or
3.8.3  Shock.
a  simulated  case)  shall  withstand  a  total  of  18  shock  impulses,
Each  shock
3  in  each  direction  of  3  mutually  perpendicular  axis.
impulse shall be a half-sine wave with a time duration of 11 + 1
milliseconds.
The  peak  amplitude  of  each  shock  impulse  shallbe
Subsequent  to  shock,  the  alignment  device  shall  not  have
75g's.
been  damaged  or  adversely  affected  and  shall  meet  the  require-
ments of 3.8.5 and 3.9 (see 4.6.4).
3.8.4
Vibration.
The  alignment  device  in  its  Carrying
3.8.4.1  Vibration  "A".
Case  (or  a  simulated  case)  shall  withstand  vibration  for  15
minutes  each  in  3  mutually  perpendicular  directions.
Vibrations
in  each  direction  shall  be  at  frequencies  varied  logarithmically
The  double  amplitude  of  applied  vibrations
from 5 to 500 Hz.
shall  be  .036  inches  at  lower  frequencies  and  shall  be  maintained
at, but not exceed, a 5g level at higher frequencies.
Subsequent
to  vibration,  the  alignment  device  shall  not  have  been  damaged  or
adversely  affected  and  shall  meet  the  requirements  of  3.8.5  and
3.9  (see  4.6.5.1).
With  the  alignment  device  held  by
3.8.4.2  Vibration  "B".
the  upright  tube  in  a  horizontal  position,  the  alignment  device
shall-be-vibrated  in  a  vertical  plane  at  a  constant  frequency  of
thirty Hz with an amplitude of 1/16 inch (1/8 inch total
excursion) for a period of five minutes plus or minus 15 seconds.
Subsequent  to  vibration,  the  Alignment  Device  shall  not  have  been
damaged  or  adversely  affected  and  shall  meet  the  requirements  of
3.8.5  and  3.9  (see  4.6.5.2).
4

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