In a message dated 12/7/00 4:53:33 PM US Eastern Standard Time,
[log in to unmask] writes:

Phil

Contamination Studies Laboratories (CSL) can conduct ion chromatography
testing of these assemblies to determine the level of contaminants remaining
and the risk impact.  As Brian stated, you need to act quickly to have the
best chance of saving the 30 boards.  The 30 boards can be cleaned as Brian
described, but you still need to test these to determine the effectiveness
and completeness of any cleaning method you use.  Contact me offline so we
can discuss your options and the services we can provide.

Regards,

Pat Kane
Technical Sales Manager
Contamination Studies Laboratories
765-457-8095  office
765-419-2080   cell

> OK.  We goofed.  Now I need to know how to fix all my problems.
>
>  We are getting ready to convert from Alpha NR205 no clean flux to Alpha
>  Lonco 373 aqueous clean flux in our wave solder machine.  Today my
>  maintenance person mixed the two chemistries together in the machine. Yea,
I
>  shouldn't have put the new stuff anywhere near the old stuff.  Hind sight
is
>  always 20-20.  So here is the real problem.  About 20 or 30 through hole
>  boards were run through the wave solder machine after the stuff was mixed
>  together.  My initial (unpleasant) conversation with the flux vendor
>  engineer suggested that there might be halides on these boards.  So we have
>  segregated the boards until we can test or clean them.  Cleaning the
machine
>  should be no problem I'm told by the machine manufacturer's tech.
>
>  How do I test for or remove halides from the circuit boards?
>
>  Oh yea, these boards are hot for production naturally.
>
>  Phil Nutting
>  Manufacturing Engineer
>  Kaiser Systems, Inc.
>  High Voltage Power Supplies That Work(tm)
>  126 Sohier Road
>  Beverly, MA 01915
>  ph: 978-922-9300
>  fx: 978-922-8374
>  [log in to unmask]
>

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