>I'd really like to know if I could use that solution to calibrate my 
>TDS-1? That would be good enough as far as I'm concerned.
>For that matter, could you crank the calibration screw on the PWT 
>far enough to let it read ppm directly, and would that be reliable?

   Here's something to try. Poor some distilled water into a glass then
test it with the TDS meter. Now stick your finger in the water and
stur it up a little and test it again.







Take Care 

Reid



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