49Appendix A Temperature compensationElectrical conductivity indicates solution concentration and ionization of thedissolved material. Because temperature greatly affects ionization, conductivitymeasurements are temperature dependent, and are normally corrected to readwhat they would be at 25 ºC.A.1 Compensation to 25 ºCThe MP series handheld meters includes temperature compensation to 25 ºC.Temperature compensation can be set to KCl, NaCl or 442 solutions or tailored forspecial measurements or applications.A.2 Changes in temperature compensationMost conductivity meters approximate the temperature characteristics of solutions,and assume a constant value, such as, 2%/ºC. In fact, KCl temperaturecompensation changes with concentration and temperature in a non-linear fashion.Other solutions change even more. The MP series handheld meters usecompensations that change with concentration and temperature instead of singleaverage values (Figure 8).Figure 8
