[200q20v] a Chemist in the house???

[David Schaible]

>Date: Thu, 08 Mar 2001 10:13:36 -0500
>To: "McCoy, Charlie" <CMcCoy at visa.com>
>From: David Schaible <dschaible at penw.com>
>Subject: RE: [200q20v] a Chemist in the house???
>In-Reply-To: <21D3D3B7CF1CD211AD3A0001FAF8DCC5019C2F0D at SW750X036.visa.com>
>
>
just for info, a trick we use on water for conductivity tests is to boil
the purified water for at least five minutes and this gets rid of the
carbon dioxide and will bring your conductivity back to near zero. you must
seal the container as it cools of course.
>
>At 07:00 AM 3/8/01 -0800, you wrote:
>>I'm no chemist (but Dad has a PhD in physical chemistry) and he always has
>>me use "fresh" sealed distilled water (apparently letting d-water sit around
>>for a while allows Co2 to absorb, increasing conductivity marginally...but I
>>digress) for cleaning circuit boards as it is fairly non-conductive (tap
>>water, with it's impurities IS fairly conductive) and when dry will leave no
>>residue.  PURE denatured Ethanol (most stuff is 80% alcohol and has
>>impurities) has also worked well as a finishing rinse.
>>
>>
>>Charlie
>>
>>
>>-----Original Message-----
>>From: Sylvester, Mike [mailto:Mike.Sylvester at sycamorenet.com]
>>Sent: Thursday, March 08, 2001 8:53 AM
>>To: 'Brett Dikeman'; Glen Powell
>>Cc: 200q20v at audifans.com
>>Subject: RE: [200q20v] a Chemist in the house???
>>
>>
>>Brett Dikeman once said:
>>I'm no chemist, but I certainly don't recommend the previous
>>solution(water?!?)  Somebody was dippin' into the secret stash when they
>>suggested that one :-)....If you don't want to go the route of c41/deoxit
>>etc, then windshield
>>washer fluid should be a much better choice than straight water....
>>
>>Brett
>>
>>
>>
>>What is wrong with water?  As long as you dry everything after, water will
>>less harmful than anything else.  Are you aware that when PC boards are
>>manufactured, like those used in the ECU, they are washed with water after
>>all of the components are soldered.  In the past when I've reworked a
>>computer board, e.g. change a resistor, I've taken the board to the bathroom
>>sink and washed off the flux.  You must of course dry it completely before
>>powering it.  This could be the tough part with the fuse box, since it has
>>many nooks and crannies.  Also, isn't windshield washer fluid about 95%
>>water?
>>
>>Mike Sylvester
>>_______________________________________________
>>200q20v mailing list
>>200q20v at audifans.com
>>http://www.audifans.com/mailman/listinfo/200q20v
>>_______________________________________________
>>200q20v mailing list
>>200q20v at audifans.com
>>http://www.audifans.com/mailman/listinfo/200q20v
>>