 |
|||
|
|
|||
| ||||||||||
|
|  MIL-T-63531(AR)
4.5.4 Environmental characteristics (first article inspection
only .
4.5.4.1 Temperature-humidity. The Universal Boresight Kit
(UBK) shall be subjected to temperature-humidity testing as
follows:
a. With the temperature nonoperating, adjust chamber
temperature at +160F with uncontrolled humidity and stabilize
UBK. Maintain this condition for not less than 4 hours.
b. Return chamber to room ambient (temperature and
humidity). Upon stabilization of UBK, operate UBK as specified in
4.5.1.
4.5.4.2 Salt fog. The UBK shall be subjected to the test of
Method 509.1 of MIL-STD-810. Operation of the UBK shall not be
requires and failure criteria shall be limited to corrosion of
finishes and metals only. Such corrosion shall be defined as
visible degradation of the UBK surfaces that can be attributed to
flakey, pitted, blistered, or otherwise loosened finish or metal
surface.
4.5.4.3 Sand and dust. The UBK shall be subjected to the
test of Method 510.1 of MIL-STD-810, Procedure 1, except
temperature to be +73F and relative humidity of less than 22
percent. Air velocity to be 1750 + 250 feet per minute and dust
concentration at 0.3 + 0.2 mx/ft3 and maintain these conditions
for 6 hours. After 6 hours, turn off air velocity and dust feed
and stabilize. Perform operation test (4.5.1] before any cleaning
is performed.
4.5.4.4 Explosive atmosphere. The UBK shall be subjected to
the test of Method 511.1 of MIL-STD-810, Procedure I, except test
to be limited to altitude of ground level.
4.5.4.5 Rain. Method 506.1, Procedure I, of MIL-STD-810
shall apply. During each 30 minute rain period, the wind shall be
maintained for net less than 15 minutes commencing 5 minutes after
the start of the period as specified in the procedures. The UBK
shall be operated as specified in 4.5.1 during the last 10 minutes
of the 30-minute period.
4.5.5 Proof test (first article inspection only). When
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals