Producing good solder joints on today's complex PC
boards requires the precise control of solder flux
density, the most critical parameter in wave soldering.
Unfortunately, it is
difficult to maintain the flux at a specified density
with the majority of measuring devices available.
Flux density is measured and/or controlled with any
of these instruments:
hand-held hydrometers
density meters
density controllers
flow measurement devices
automatic viscosity controllers
Of these, the automatic viscosity controller, a
newcomer to wave soldering, is the only one capable of
consistently accurate measurements. The viscosity
control system will maintain specific gravity to within
± 0.005 gm/ml.
To download Reprint #140 Acrobat PDF file
click
HERE.
