Owner manual
40
A.
Once the effect of temperature is removed, the compensated conductivity
the conductivity of a solution is performed automatically by the internal
processor with data derived from chemical tables. Any dissolved salt at
a known temperature has a known ratio of conductivity to concentration.
chemists for decades.
B. Solution Characteristics
mixtures of electrolyte solutions. To address this problem, industrial
users commonly use the characteristics of a standard material as a
model for their solution, such as KCl, which is favored by chemists for
its stability.
Users dealing with sea water, etc., use NaCl as the model for their
concentration calculations. Users dealing with freshwater work with
mixtures including sulfates, carbonates and chlorides, the three
Company calls “natural water”. These are modeled in a mixture called
standard, as it does standard KCl and NaCl solutions.
The Ultrameter II contains algorithms for these 3 most commonly
referenced compounds. The solution type in use is displayed on the
of the User solution type is that one may enter the temperature
compensation and TDS ratio by hand, greatly increasing accuracy of
measurements and should be reset for different dilutions or temperatures.
C. When does it make a lot of difference?
accuracy of any TDS conversion. Assume we have industrial process
uncompensated.
The difference in values is 40%.
the NaCl mode because their previous data gathering and process
monitoring was done with an older NaCl referenced device.
Selecting the correct Solution Type on the Ultrameter II will allow the
user to attain true TDS readings that correspond to evaporated weight.