I could be wrong, but I thought 'tid' refers to 3 x daily.
N.

> From: [email protected]
> To: [email protected]
> Subject: Re: CS>Alhambra distilled water measured 0.1 uS
> Date: Thu, 15 Mar 2012 15:57:29 +1100
> 
> Medically this stands for 3 x daily - dissolved solids sounds more 
> relevant - but if it's a standard medical term it's odd to use it for 
> something else too.
> 
> Jane
> 
> 
> TDS stands for 'total dissolved solids'.
> 
> 
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