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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: Ela
Date posted: Tue Jul 22 11:54:50 US/Eastern 2003
Subject: Storing Environment defenition for ElecroOptical Equipment
Message:
Our problem is to define proper storing conditions (humidity and temperature)to Elctro-optic Equipment. According to field data the influence of temperature is minor in comparison to humidity , despite the theory of Ahrenius Model and MIL-HDBF-217. So we are considering to start storing this type of equipment without temperature control (just humidity conrol). We are concerned that this action will cause serious shortage of system life time? What can you advise in this case?


Reply:

Subject: Storage Reliability
Reply Posted by: BWD (bdudley@alionscience.com )
Organization: RAC
Date Posted: Wed Jul 23 15:08:21 US/Eastern 2003
Message:
Humidity control is highly recommended for storage of electronic components. Corrosion is the single biggest cause of storage degradation and failure. Corrosion is humidity and temperature dependent, so control of both would be in your best interest, but humidity is the prime problem. I do not believe that your approach will shorten the life, it should increase the life time to failure. MIL-HDBK-217 does not have models that predict the storage life times, it only has models for active operation of the components, so really is not applicable for your problem.


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