Re: CS>PPM

[Robert Berger]

Hi JAG,
   
  There is no real relationshiop between uS/cm and PPM.
   
  The uS/cm will change with time. Check it as made, and again 24 hours later. 
The last reading MAY be within (higher) 10 to 15% of PPM.
   
  You need to standardize everything. But most importantly measure the initial  
cell current as it will determine how long to reach a given concentration or 
PWT reading.
   
  Basically a 2 to 1 difference in initial current will affect the end point by 
that inverse ratio.
   
  "Ole Bob"