Owner manual

41


the User mode.
XXII. TEMPERATURE COMPENSATION (Tempco)
and TDS DERIVATION
The Ultrameter II contains internal algorithms for characteristics of the
3 most commonly referenced compounds. The solution type in use is
            

TDS conversion values of a unique solution via the keypad.
A. Conductivity Characteristics
When taking conductivity measurements, the Solution Selection determines
the characteristic assumed as the instrument reports what a measured




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

          

 
      
where it is normally measured. After selecting User function, set



value. Divide that difference by the temperature difference.
          
conductivity. Change the temperature to a typical measuring
temperature. Set the tempco to an expected value as in User
Programmable Temperature Compensation, pg. 13. See if the


C. 
Once the effect of temperature is removed, the compensated conductivity
