Hey, folks, 
I should know where to find this, but my brain is getting old.
We recently changed the lower limit for our H2O processing (for washing OA fluxes) from 200KOhms to not less than 1 megOhm. Obviously, when the beds are new, we run in the 10 meg range. 
So one of our customers wanted to know how we set 1 meg as the lower limit...our answer, of course, was that it was based on experience and what other folks are doing...

Can anyone give me a better (i.e., more supportable) answer that I can give to my (45% of my business) customer?

Thanks, 

Bill

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