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Page Title:
Table III. Temperature Cycle (cont.) |
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|  MIL-T-48554A(AR)
TABLE III. Temperature Cycle (cont.)
STORAGE
OPERATING
ROOM
TEMP
TEMPERATURE SOAK
TEMPERATURE SOAK
SEQUENCE
SOAK
5
+60F to +90F 3 hrs
(+16C to 32C)
* Same 4 hours as Storage Soak
4.9.2 Shock.This test is applicable to the First Article
Sample and the Reliability Sample only. The telescope shall be
positioned on Adapter 10549198 and secured to the shock tester.
The telescope shall be subjected to a shock test in accordance
with 3.6.3. Upon completion of the shock test, the mount shall be
inspected to the requirements specified in 3.6.3.
4.9.3 Vibration "A". This test is applicable to the
Reliability Assurance Sample only. The telescope shall be
positioned on Adapter 10549198 and secured to the vibration
tester. The telescope shall be subjected to a vibration test in
accordance with 3.6.4 of this specification. Upon completing of
the vibrationtest, the telescope shall be examined and inspected
to the requirements of 3.6.4.
4.9.4 Vibration "B". The telescope shall be positioned on
adapter 10549198 and vibrated in accordance with 3.6.5. At the
conclusion of this test, the telescope shall be subjected to a
visual and tactile examination and shall meet the requirements of
3.6.5.
4.10 Interchangeability. The interchangeability gage,
11747975, shall be applied to the mounting sirgface (keyway) the
panoramic telescope to assure maximum fit conditions. The gage
shall be firmly seated in the keyway and the bolts seated against
their respective stops. Any telescope which does not accept the
interchangeability gage, without using force, shall be rejected.
4.11 Sealing
and
purging.
4.11.1 Optical assembly. The telescope shall be capable of
withstanding an internal pressure of 7 + 0.10 psig for a period of
1 hour with no evidence of leakage. Prior to the start of the
test, secure the poppet valve in a closed position. Then
pressurize the telescope with dry nitrogen as specified in
paragraph 3.8.1. Accuracy of the test shall be equal to or exceed
the accuracies depicted on Pressure Test Drawing 8565556.
assembly. The telescope's counterbox
4.11.2 Counterbox
assembly shall be capable of withstanding an internal pressure of
5 + 0.10 PSIG for a period of one hour with no evidence of
leakage. Prior to the start of the test, secure the poppet valve
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