WS6536E does say facilities to be in accordance to MIL-STD-1695.  Do not 
know what that said.  MIL-STD-2000 para 5.4.9.2 says temperature shall be 
maintained at 75 plus or minus 9 degrees F and the relative humidity shall 
not exceed 65 percent.  It also says when the humidity decreases to a level 
of 30 percent or lower, ESD devices shall be processed with extraordinary 
controls in accordance with MIL-STD-1686.
 ----------
From: [log in to unmask]
To: [log in to unmask]
Cc: [log in to unmask]
Subject: Re: Temp. and RH
Date: Monday, July 08, 1996 4:35PM

     Hi!
There is a fair possibility that your "requirements" are from the Weapons 
Specification 6536 which contained temp and humidity requirements for
assembly. I can't find a copy of 6536 but I believe that it bounced the 
reader to
another Mil spec (1695??)which contained stuff on temperature, dust, 
lighting,
humidity,
etc. Chase this lead down and see if it is helpful. Good Luck.


Dave Hillman
Rockwell Collins
[log in to unmask]

______________________________ Reply Separator
_________________________________
Subject: Temp. and RH
Author:  [log in to unmask] at ccmgw1
Date:    7/3/96 9:53 AM


Our PWB assembly facility is in a controlled environment kept at 72 degrees 
F, and 50% R.H.  The problem is, we don't remember how we decided these were 
the best conditions.  Does anyone know of an IPC document or other source 
stating the best environmental conditions for PWB assembly (including SM 
assembly)?
Any info. is appreciated.  Thank you.

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