Hi Matthew,

Be very careful using edge card connectors or similar (they need to be 
gold-plated contacts), especially if you are testing to Class III conditions 
(85C/85% RH).  Leakage across the connector can be a problem.  You should 
definitely make the appropriate electrical measurements before changing 
connection schemes.

By the way, you should remove the flux after soldering the wires onto the coupon 
so that it does not contaminate your samples.  We use WW rosin and clean using a 
plastic scrubber (it looks similar to steel wool) and IPA.  This should be done 
immediately after soldering.  Be careful not to let the IPA run onto the coupon 
(orient the coupon vertically with the connedtion side down).  Also, it's a good 
idea to use Teflon coated wired.

If you have any questions, drop me a line.

Regards, Sande Petty-Weeks, Motorola, [log in to unmask]
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From: [log in to unmask]@INTERNET on Wed, Mar 6, 1996 2:41 PM
Subject: Connecting wires to PCB's

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IPC,

I am an intern for INTeL Corporation and I am currently working on a 
project that involves the measurements of the Surface Insulation 
Resistance(SIR) of PCB's.  The project has been broadened recently and I 
have come to the conclusion that the current methods are taking too long 
and are too sloppy.  

So here is the deal.  
The SIROMETER has 22 gauge wires which are connected to the pcb's.  The 
coupons we are currently using are B24(I don't know where INTeL got 
them, but my supervisor suggested to contact IPC.ORG on the web to look 
for help).  Well, soldering the wires to the edge connectors of the 
PCB's just isn't cutting it.  It is a painstakingly long process and 
resoldering is very messy and will impede with the integrity of our 
results.  

The question - Do you know of any type of connectors or adapters or 
small jumper cable type things that would make this connection simpler?

I am probably going to drop by Homebase tomorrow to see if they got 
anything that would work.  Just wanted your opinion.  

Thanks for your time!
Matthew Holden
Intern at INTeL Corporation
(602) 554-3247