Hi Dan,
I make the spect. readings at the end of the brew. But I have checked EIS
that is as year old and the PPM readings don't change more than about 1%. In
fact I have had some that have increased as much as 20% for reasons unknown.
For a point of history I have used 17 Hack kits for silver testing. Each kit
makes 50 tests and cost $85.00. That's about $1450.00 of chemicals and over
half have been for my experimentation.
Every brew I make has a data record of time, voltage, current and many with
conductivity.Many have been potted with Wplot32.exe. A very valuable tool and
it is available to anyone, free.
"Ole Bob"
