Ivan-

>As Ag+
>5ppm     1.76     2.8uS
>10ppm   1.76     5.7uS
>15ppm   1.77     8.5uS
>20ppm   1.77   11.3uS
>25ppm   1.78   14.0uS
>50ppm   1.79   27.9uS

I've got a Hanna PWT (0-100uS) meter
and I'm very interested in
these figures.  How do I take
into account the initial TDS of the
batch water. say for instance I
start with water that has a TDS of
3ppm and then after my run I measure
11.3uS?   Do I subract the 3 from
20ppm?

Many thanx,

Steve King


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