Endress+Hauser Mycom CLM 152 - 7.3 Temperature Compensation

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7.3 Temperature Compensation
® Commissioning (Start-up)
® Temperature
® Temperature compensation + Chapter 7.3.1
® Temperature measurement + Chapter 7.3.2
The temperature coefficient indicates the change in conductivity per degree of
temperature change. It depends on the chemical composition of the solution and on its
temperature.
Figure 7.6
Concentration
dependence of
temperature coefficient
for various electrolyte
solutions (reference
temperature Tref = 77°F/
25°C)
Concentration (percent by weight)
Temperature coefficient (%/K)
For example, salt solutions (NaCI) have a non-linear temperature coefficient. The NaCI
characteristic (acc. to DIN IEC 746 for low concentrations) is stored in the instrument.
Temperature °F (°C)
Temperature coefficient (%/K)
Figure 7.7
Dependence of
temperature coefficient
on temperature for NaCI
solutions.
There are also several other compounds selectable as well as up to four free
programmable tables.