Humidity of >30% and <70% is the usual range.  It is used in ANSI/ESD S20.20
and other standards.
Below 30% it is too dry and large static charges can be generated.  Higher
than 70% and you may have proglems with moisture sensitive components,
oxidization, solderability, cure of air dry coatings, computer problems,
condensation, and other processing problems.

Al Cash


-----Original Message-----
From: West, Jim [mailto:[log in to unmask]]
Sent: Tuesday, December 21, 1999 3:17 PM
To: [log in to unmask]
Subject: [TN] Relative Humidity



Hi Everyone,

What is everyone keeping the RH in your facility?  What does everyone
recommend, or what is the standard if any?  What are the down sides to low
RH as well as high RH.  Your opinion is greatly appreciated.

Thanks,
Jim

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