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Erik Malund
11/26/12 12:49
Read: 554 times
Mt Airy, Nc
USA


 
#188908 - testing
Responding to: Oliver Sedlacek's previous message
I thought everything was fine until

there is an old adage
"succesful testing does not prove the abscence of faults, it proves the abscence of known faults"

and THIS is the very reason not to go outside the datsheet, you can test till the cows come home, but you will never know that there is no problem.

I recall a series of units tht ran flawlessly for years untill the new ones started experiencing the feared "it fails once a week". It turned out thet the hardware 'designer' had 'designed' to typical values and when the next batch of chips were in another correct place between min and max, the above happened.

Erik

List of 27 messages in thread
TopicAuthorDate
-40 degree Celsius operation      Raj Nambiar      11/24/12 03:45      
   Heating pads      Hal Albach      11/24/12 04:15      
   Undefined behaviour!      Andy Neil      11/24/12 04:51      
      bending it in neon      Erik Malund      11/24/12 08:31      
         That means that you're on your own ... no support       Richard Erlacher      11/24/12 08:53      
   Why?      Kai Klaas      11/24/12 08:52      
      Not in Dubai      Raj Nambiar      11/26/12 07:12      
         nobody has been that stupid      Erik Malund      11/26/12 07:47      
         So many pitfalls...        Oliver Sedlacek      11/26/12 10:18      
            testing      Erik Malund      11/26/12 12:49      
               And what is the cost of testing?      Kalpak Dabir      11/27/12 22:10      
                  the cost of testing      Andy Neil      11/29/12 00:54      
                     it's not just pass/fail ...        Richard Erlacher      11/30/12 09:47      
                        Tell me about it!      Andy Neil      11/30/12 11:24      
                        Why?      Erik Malund      11/30/12 14:13      
                           Why??? It's to protect your own gluteus maximus      Richard Erlacher      11/30/12 15:28      
         what would happen       Andy Neil      11/26/12 23:42      
   Heaters/controllers      Joseph Hebert      11/24/12 20:31      
   Low temp components      Oliver Sedlacek      11/26/12 02:45      
      Potting wont help       Andy Neil      11/26/12 23:45      
         it's probably less costly to heat a small enclosure      Richard Erlacher      11/27/12 00:08      
            at very cold start...      Stefan KAnev      11/27/12 06:18      
               Yes it can ...      Richard Erlacher      11/27/12 10:16      
   it's not that simple ...       Richard Erlacher      11/27/12 00:13      
      heater      Erik Malund      11/27/12 07:25      
         With an NTC resistor driving the base?      Oliver Sedlacek      11/27/12 08:35      
            It's very simple...      Kai Klaas      11/28/12 05:37      

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