Steve, What does Bruce have to say on the matter? Does the baking soda (CaCO3?) react at all with the silver? If not, then it will always be present as Ca++ and CO3-- ions and will affect the reading by the original ppm or uS reading.
Why don't you try adding some cs to reach the same start up reading? Ivan. ----- Original Message ----- From: Steve King <ssk...@nildram.co.uk> To: <silver-list@eskimo.com> Sent: Tuesday, 26 October 1999 23:25 Subject: Re: CS>ppm standard - 1.74PPM/uS > Ivan- > > > > >Do you mean 3ppm TDS or 3uS. > > 3ppm > > >I must say that even my dw that has been around for months still reads > >1uS. > > I should clarify. The 3ppm is due to the calibration technique > required by the 3-electrode CS Systems Phaser unit I'm using. > Baking soda is added to pure water to bring the conductivity up to > 3ppm (measured by the TDS meter). The Phaser won't work > without an initial conductivity that is roughly equivalent > to 3ppm. > > This initial 3ppmTDS measurement corresponds to 6uS on the PWT > meter - which correlates to the conversion that Hanna gave me of > 1ppm = 2 uS when measuring dissolved solids in water. > > Does this make any sense at all?!!? > > cheers, Steve King > > > > > >Regards - Ivan -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: silver-list-requ...@eskimo.com -or- silver-digest-requ...@eskimo.com with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: silver-list@eskimo.com List maintainer: Mike Devour <mdev...@id.net>
