 |
|||
|
Page Title:
Inspection equipment design requirements. |
|
||
| ||||||||||
|
|  MIL-C-70490(AR)
the test equipment will reliably indicate acceptability of a
product which does not exceed 90% of the prescribed tolerance
limit, and permit positive rejection when non-conforming.
Construction shall be such as to facilitate routine calibration of
test equipment.
4.5.2.3 Inspection equipment design requirements.
4.5.2.3.1 Temperature testinq. The volume of the test
chamber shall conform to the test facilities requirements of
MIL-F-13926. The air temperature at the control sensor shall be
in accordance with the specified requirements within plus or minus
2.5F (1.4C. The temperature gradient across the
cross-sectional area occupied by the test item shall not exceed
0.5F per foot in any direction. The heat source of the test
chamber shall be so located that radient heat, if used, will not
fall directly on the test item. Thermocouples or equivalent
temperature sensors utilized to determine or control the specified
chamber temperature shall be centrally located within the test
chamber within the supply airstream, or in the return airstream,
whichever provides the specified test condition at the item under
test and shall be baffled or otherwise protected against radiation
effects.
4.5.2.3.2 Fabrication, setup and calibration. Design and
fabrication of test equipment shall be such that it incorporates
the features of rigidity, stability, and ease of maintenance.
Setup and calibration equipment necessary for certification of the
testing equipment accuracy shall be furnished and will become a
part of the testing equipment. Operating and calibration
instruction shall be prepared and submitted to the procuring
activity.
4.6 Test methods and procedures. Unless otherwise specified
in the contract, the following procedures shall be utilized to
conduct specified tests. If the contractor chooses to use
alternate test procedures, a detailed description of the set-up
and procedure shall be submitted to the government procuring
agency for approval prior to use.
4.6.1 ESS temperature. Testing equipment utilized in this
test shall conform to the requirements of 4.5.2.3.1. The memory
shall be placed in the test chamber and the temperature of the
chamber reduced, 10C (18F) per minute plus or minus 1C
(1.8F) from room ambient temperature (as specified in 3.3.1) to
-57C (-71F). The memory shall be maintained at this
temperature for a minimum of 20 minutes. Upon completion of the
2O minute exposure, the temperature of the chamber shall be raised
0
10C (18F) per minute plus or minus 1C {1.8 F) to
for a minimum of 20 minutes. Upon completion of the 20 minute
14
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals