I concur with Jan.

In my previous life, I used a batch cleaner  try to clean
water-soluble solderpaste flux from smt boards.  Tried 3 or 4
solderpaste mfg's, and all had flux residue remaining under
components and in solder joints after many cycles of
dishwashing.  For some cleaning cycles, 5 to 10% saponifier
was used but still same result.  Ending up throwing away 5
dozen good boards because of solder joint discoloration.

conclusion:
A batch cleaner is for dishwashing dishes.  It's not for
dishwashing smt boards.

Matthew Park
NII-Norsat International Inc.

>>> Jan Satterfield <[log in to unmask]> August 12,
1998  1:07 pm >>>
I've never seen a batch cleaner yet that would remove RMA from
SMT
assemblies. I've worked with both Batch cleaners and in-line
cleaners
and have learned that batch works great with thru-hole
components, but
you really need an in-line cleaner to clean under SMT parts.
Good Luck!

>-----Original Message-----
>From:  Devitt, Kenneth [SMTP:[log in to unmask]]
>Sent:  Wednesday, August 12, 1998 8:33 AM
>To:    [log in to unmask]
>Subject:       [TN] Batch cleaning of SMT RMA fluxes
>
>To TechNet,
>
>We are currently running a dishwasher type batch cleaner
>(AqueousTechnologies Model  RU400) and Kyzen XJN (30%
concentration) are
>having difficulties removing flux residues from our SMT
assemblies with RMA
>solder paste (ESP 63/37 RMA flux).
>
>Our current parameters are 155 F for wash chemistry for 9
Minutes,   100 F
>water rinse for total of 15 minutes, and 12 min. dry @ 120 F.
>
>We would like to hear from Techneters who are successfully
using batch
>cleaners to remove RMA fluxes in terms of machine mfr.,
chemistry type, wash
>and rinse parameters.
>
>thanks in advance,
>
>Ken Devitt                              Tom Long
>[log in to unmask]        [log in to unmask]
>973-284-3880                    973-284-2786
>
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