RE: NANFA-- TDS and Conductivity
Thu, 19 Oct 2000 16:32:14 -0500

On 19 Oct 2000, at 10:08, Hoover, Jan J ERDC-EL-MS wrote:

> Values for total dissolved solids (ppm) are usually a fraction of the value
> of specific conductance (in micromhos). This fraction is frequently around
> 0.65 but may range from 0.5 to almost 1.00.

OK, so what I get out of all this (and pretty much the way I had
figured it beforehand) is that my meter is actually measuring
conductivity (albeit in units which correlate to TDS), which, if I
assume the instrument is calibrated to the 0.65 number, could be
wrong by as much as 35%, Hanna's claims of +- 10ppm accuracy
notwithstanding. But since I shouldn't really CARE what TDS is,
because conductivity is the preferred measurement, then I should
be happy.


It makes me mad when I go to all the trouble of having Marta cook up about
a hundred drumsticks, and the guy at the Marineland says, "You can't throw
chicken to the dolphins. They eat fish." Sure they eat fish, if that's all
you give them. Man, wise up.

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