Manual




Tempco always varies among solutions because it is dependent on their
individual ionization activity, temperature and concentration. This is why
the Ultrameter II features mathematically generated models for known
salt characteristics that also vary with concentration and temperature.
B. Finding the Tempco of an Unknown Solution
One may need to measure compensated conductivity of some solution

          

 
conductivity. Heat or cool the solution to a typical temperature
where it is normally measured. After selecting “User” function,


conductivity and the new temperature. Divide the % decrease

temperature difference.
 
conductivity. Change the temperature to a typical measuring
temperature. Set the tempco to an expected value as in User



read.
C. 
Once the effect of temperature is removed, the compensated
           
of TDS to compensated conductivity for any solution, which varies
with concentration. The ratio is set during calibration in “User” mode
          
unknown solution has to have its TDS determined by evaporation and
weighing. Then the solution whose TDS is now known can be measured
for conductivity and the ratio calculated. Next time the same solution is
to be measured, the ratio is known.