Thanks Ode.  I just want to know if I am making 10ppm or 50ppm EIS.  Will the 
conductivity meter you mentioned do that?  If not I guess I will just have to 
keep 'winging' it!

Just for general information.  I purchased the TDS meter on amazon.  When I 
contacted them about it being defective they refunded me my purchase price and 
told me to trash the meter.
PT

.






On Monday, November 2, 2020, 08:05:55 AM EST, Ode Coyote 
<[email protected]> wrote: 





It should have been calibrated at the factory...calibration can be pretty 
tricky and  requires a calibration fluid
Send it back...it's defective.
 For EIS, get a conductivity meter....TDS meters, in general,  'suck' [made for 
salt water..silver isn't salt]
HM Digital  EC-3 is a decent meter... their COM-100 is more interesting 
including conductivity and scales for 3 different types of salt solutions
THEY ALL don't do what you may think or want them to do in EIS.. a very dynamic 
and ever changing substance.
 Not COMPLETELY useless, but not far from it.

Ode

On Sun, Nov 1, 2020 at 1:50 PM PT Ferrance <[email protected]> wrote:
> My first TDS meter just arrived.  It talks about calibration but with no 
> directions as how to do this.  Since it is showing 862ppm and it has not been 
> dipped into anything I am anticipating that this needs to be done.
> Would someone point me in the right direction?  
> I've searched but have not found good directions.
> Thanks. 
> PT
> 
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