Had the same problem with an edge connector oozing contaminants when I 
checked it by omegameter in as received condition. Thinking about degolding 
of the pins on the soldering area and bad cleaning afterwards. Could it be?
Gaby

----- Original Message ----- 
From: "Graham Collins" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, February 19, 2008 7:35 PM
Subject: [TN] cleanliness testing


Hello TechNet
I'm in a debate with a supplier about the incoming cleanliness of one of 
their parts, they claim it's squeaky clean and I claim it's as salty as a 
bag of salt & vinegar potato chips.  Obviously we are both exaggerating, but 
one of us has a good claim.

They are fending me off with resistivity measurements made per the manual 
test method IPC-TM-650 2.3.25  - which works in that I don't know how to 
convert it to the "ug NaCl/in2" equivalent units I'm used to.  Is there a 
valid conversion?

Sir Doug of Dew, if you reply please do NOT say it depends...

regards,

Graham Collins
Halifax Production Engineering
L-3 communications Electronic Systems
(902) 873-2000 ext. 6215



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