Click here to make tpub.com your Home Page

Page Title: Pressure (counterbox area)
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-T-60895(MU)
3.4.2 Pressure (counterbox area). - Apply an internal pressure of
2.0 + .25 pounds per square inch (psi) of dry nitrogen for a period of
3 minutes to each telescope. There shall be no evidence of leakage.
3.5 Cleanliness. - The telescope shall meet the cleanliness requirements
of Specification MIL-O-13830 and there shall be no more than 2 particles
of dirt visible on the reticle. The area of each particle shall not be in
excess of the area equivalent to a size 10 dig. There shall be no dirt
on other surfaces which interferes with observation or adversely affects
image quality.
3.6 Orientaion. - The requirements of 3.7 to 3.8.3.3.2 inclusive
shall be met with the telescope orientated in the following position:
(a) The main telescope tube vertical as determined by the
keys on each side.
(b) The reset counter indicating 3200 mils and the azimuth counter
set at 0000 (Black).
(c) The gunner's aid counters set at zero.
(d) The line of sight horizontal.
(e) The elbow assembly centered between the swing stops with 2.
(f) Knob 8587442 indicating INDIRECT (out of detent).
3.7 Accuracy.
3.7.1 Collimation.
3.7.1.1 Pre-vibration. - Prior to meeting the requirements of 3.3.4,
the line of sight shall be perpendicular to the locating keyways within
5.0 mils.
3.7.1.2 Post-vibration. - Subsequent to meeting the requirements of
3.3.4, the line of sight shall remain within 0.25 mil of the azimuth
position established in 3.7.1.1.
3.7.2 Image tilt. - When checked at 1600 mil increments in azimuth
through two full revolutions in each direction, the image of a vertical
target line shall be vertical within one degree of arc. This requirement
shall also be met with the elbow assembly positioned against each of the
swing stops.
3.7.3 Parallelism of reticle and image. - When checked at 1600 mil
increments in azimuth through two full revolutions in each direction, the
vertical reticle line shall be parallel to the image of a vertical target
line within 30 minutes of arc. This requirement shall also be met with
the elbow assembly positioned against each of the swing stops at each
azimuth setting.
3.7.4 Eyepiece focus. - The eyepiece focus shall be fixed between
the limits of -0.75 and -1.0 diopters
3.

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

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