Is the bottle well capped? If not it could be CO2 absorption. Is the temperature different between the two measurements. Conductivity increases rapidly with temperature, and most meters try to compensate for that, but all don't do a good job.
Marshall "Medwith, Robert" wrote: > > > Can any one explain this to me > I am brewing CS a gallon at a time very slow some times a week > last batch tested out at 28 PPM (with meter) > I let it set for a week or so and retest it and it read 48 PPM > What is happening, can any one explain this > The CS is very clear > > Bob
