Temperature compensation
50
A.3 Graph of comparative error
In the range of 1000 µS, the error of using a KCl temperature compensation on a
solution that should be calculated as NaCl or 442 is shown in the chart below
(Figure 9).
To measure natural water-based solutions to 1%, users must alter the internal
temperature compensation to the more suitable, pre-loaded 442 values or stay
close to 25 ºC.
A.4 Other solutions
A salt solution like sea water or liquid fertilizer acts like NaCl. The NaCl solution
compensation provides the greatest accuracy for these solutions.
Many solutions differ greatly from KCl, NaCl or 442. A sugar solution, a silicate, or a
calcium salt at a high or low temperature may require a User value to provide
readings close to the true compensated conductivity. This is determined
experimentally.
The chosen solution characteristic should closely match the sample being tested to
achieve accuracy of ±1%.
Figure 9
To Next Page
Loading...
Need help?
General
