Linear Temperature Compensation And Determination Of The Temperature Coeffi; Cient - Lovibond Tintometer SD 335 Multi Bedienungsanleitung

7.4.2 Linear temperature compensation and determination of the temperature
coefficient
If the temperature compensation function is not known, linear temperature compensation is
used in practice. In this case, it is assumed that the temperature dependence over the solution's
observed concentration range is about the same.
The conversion of electrical conductivity (EC) to the reference temperature can be carried out
using the following equation:
• TC = Temperature coefficient
Lin
• EC = Conductivity at the set reference temperature
Tref
• EC = Conductivity at measuring temperature X
TX
• T = Reference temperature (25°C / 20°C)
ref
• T = Temperature of the measuring solution
X
The temperature coefficient can be determined by measuring the conductivity of a solution
without temperature compensation at two temperatures, T1 and T2.
7.5 Maintenance and storage of conductivity electrodes
Conductivity measuring cells can be stored dry. It is recommended to rinse the electrodes
properly with distilled or deionized water after each measurement and then dry them with
a fine paper towel to avoid deposits. In the event of coarse contamination, the electrodes
can be cleaned with a soft brush.
SD_335_1 06/2020
EC
EC =
TX
Tref
1+ TK
lin
(100 %)
= (EC - EC ) * 100 %
TC
T1 T2
Lin
(T1- T2) * EC
* (T -T )
x ref
T1
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