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Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

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Original Message:

Posted by: Tami Szerencse (taszerencse@crownintl.com )
Organization:Crown International
Date posted: Wed Jun 9 11:22:13 US/Eastern 1999
Subject: environmental stress tests
Message:
Help! I am an engineering intern at an audio electronics manufacturer, Crown International. My job for this summer is to write up a new set of Product Validation Specifications for our amplifiers which are in widely used at concerts, sporting events, and the like. I would appreciate any information that anyone could give me, including web sites and reference articles, that would point me in the right direction as to what kind of tests we need to perform (thermal shock, vibration, mechanical shock/drop, etc.), what the standards for these tests might be, and how to go about performing these tests. I have little experience in this area but am anxious to learn. Thank you in advance for any help.


Reply:

Subject: Environmental Testing
Reply Posted by: Bruce Dudley (bdudley@alionscience.com )
Organization: Reliability Analysis Center
Date Posted: Thu Jun 10 9:01:55 US/Eastern 1999
Message:
The primary source for environmental testing methods is the military standard MIL-STD-810F "Test Method Standard for Environmental Engineering Considerations and Laboratory Tests". This document should be available from the Standardization Document Order Desk in Philadelphia PA. Their telephone number is 215-697-2667. Some typical default levels for ground applications would include: -40 to +60 degres C temperature range, 15 to 90 "g" shock range for 11 milliseconds, 5 to 95% relative humididty range and 1 "g" to 10 "g' random vibration range with a frequency range of 2 to 60 cycles.


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