Hello Poh:

> Is there any way to monitor the flux activity level, as to check whether
> the flux has been degraded over time, using the foam fluxer ?
>
        There is a formula I copied from a book once that determines the fluxing
power of the rosin a.k.a. its "acid value" through neutralization/titration
techniques.  I did not get to use it though because *simple monitoring of  flux
specific gravity* works good enough for us.
                          mg of KOH to neutralize a rosin sol'n in alcohol
 ACID VALUE  =
-------------------------------------------------------------------------
                         gram of dissolved rosin
        An acid value of 160-180 is considered adequate for a good rosin.

Lei Tumibay
Lead Finish Group - Assembly Engineering
Analog Devices - General Trias
Cavite, Philippines
E-mail: [log in to unmask]
http://www.analog.com

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