MIL-PRF-1/1718A
TABLE I. Testing and inspection - Continued.
Inspection
Method
Notes
Conditions
Symbol
Limits
Unit
Min
Max
Conformance inspection,
part 3 - Continued
Periodic-check tests
Pressurizing
4003
5/ 8/
40 psia; 10 cycles
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Shock, specified pulse
1042
11/
Test condition A
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Vibration, mechanical
1032
12/
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Temperature cycling life
1027
5/
40 psia; 10 cycles
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test
Humidity
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13/
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Performance degradation
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14/
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1/
First article testing requirements hereby replace any qualification requirements referable to the product covered herein. The term
"First article testing" shall be considered as synonymous with the term "Preproduction sample approval testing." All tests
applicable herein (including all First article tests and conformance inspection, parts 1, 2, and 3) shall be performed during first
article testing. A failure of any one tube in any of the tests shall be cause for decision of first article sample disapproval. The
contractor/manufacturer shall provide test reports and written assurance that:
a.
The first article sample is representative of the product to be submitted under the contract.
b.
First articles shall be manufactured from new materials and in the facility that produced the sample tubes.
A test plan shall be submitted to the contracting officer for approval prior to proceeding with first article testing. The tes t plan shall
list all production test and laboratory test facilities to be utilized in first article testing and production phases of the contract. Upon
receipt of approval of the test plan, first article testing may proceed. When testing has been completed, three copies of the test
report shall be prepared in accordance with MIL-STD-831, certified by a Government representative and submitted with the test
samples to the contracting officer for approval.
2/
Life tests shall not be required after the tubes under test (TUT) have satisfied all requirements of this document for first article
approval. However, a service-life guarantee of 2,000 hours minimum shall be required in accordance with the requirements of MIL-
PRF-1. Life for purpose of the service-life guarantee shall be defined as the total rf operating time. The sum of the operating and
shelf life shall be not less than 21 months.
3/
The tubes tested and acquired in accordance with this tube specification sheet shall be capable of shelf-life for a period of 18
months after date of shipment from the manufacturer's plant. Tubes placed in operation during this shelf-life period shall meet all
requirements of this tube specification sheet. Tubes found to be defective within the shelf-life period shall be replaced by the
manufacturer at no cost to the Government or its contractors.
4/
Unless otherwise specified, the acceptance level for all tests listed under conformance inspection, part 1, shall be 1.0, inspection
level II.
5/
After the completion of this test, the TUT shall satisfy all requirements of method 4452 (spike-leakage energy), as specified in
conformance inspection, part 1.
3