Click here to make tpub.com your Home Page

Page Title: Extreme operating temperatures.
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 




img
MIL-M-63333(AR)
4.6.2 Extreme operating temperatures.  Testing equipment utilized in this
test shall be in accordance with the "Test Facilities" requirements of
MIL-F-13926 and the conditions of 3.3.2.  The mount assembly shall be exposed
to each temperature extreme specified in 3.3.2 for. a minimum of 5 hours. At
the end of each 5 hour period, and while still at the temperature extreme, the
mount assembly shall be subjected to the tests specified in 4.6.9.1 through
4.6.9.3 inclusive.  The mount assembly shall conform to the operability
requirements of 3.3.2 for each temperature extreme.
4.6.3 Rigidity, pre-vibration.  Prior to the vibration test, position the
mount as specified in 3.4 utilizing testing equipment conforming to
4,5.2.3.2.1 and 4.5.2.3.2.2.  Install the body assembly device (4.5.2.3.2.3)
in the mount.  View through the telescope and establish coincidence of the
real and reflected images of the telescope reticle lines.  Record the readings
of" the telescope micrometer knobs for use in the post-vibration test.
Subsequent to recording the pre-vibration line of sight setting of the
telescope, remove the mounting plate assembly (with the body assembly device
installed) from the line of sight test stand, and position it on the vibration
test stand (4.5.2.3.2.4).  Subject the mount to the test in 4.6.4. Caution
must be exercised during this transfer of the mounting plate assembly. All
unnecessary shocks which would tend to render the testing equipment inaccurate
for subsequent tests shall be avoided.
4.6.4 Vibration.  Perform this test with the mounting plate assembly and
mount with body assembly device installed, positioned on testing equipment
that conforms to 4.5.2.3.2.5.  The mount shall be vibrated in accordance with
Procedure IX, Part 1 of MIL-STD-810, except that the frequency, frequency
cycling and amplitude of vibration shall be as specified in 3.5.  Immediately
following the vibration cycle, and prior the the examination for evidence of
physical failure, the mount shall be subjected to the test in 4.6.5.  Caution
shall again be exercised during transfer of the mounting plate assembly with
the mount to the line of sight test stand. Upon completion of the test in
4.6.5, the mount shall be subjected to the tests specified in 4.6.4.1.
4.6.4.1 Examination.  Subsequent to the test in 4.6.5, the mount shall be
thoroughly examined for any evidence of physical failure. A visual and
tactile examination shall be made for missing or damaged parts.  A tactile
examination shall also be conducted to determine looseness or improper
functioning of moving parts.  An audible examination shall be made of the
mount by shaking it and listening for loose parts or broken components.  Any
one of the possible defects defined above shall be cause to consider an
assembly defective.  The mount shall be subjected to the tests in 4.6.6
through 4.6.10 inclusive to determine overall compliance with 3.5.
10

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business