Abstract
Differential scanning calorimeters (DSC) are used to determine transition temperatures on cooling. Often temperature scale corrections are linear extrapolated from temperature calibration on heating. For power compensated DSC this extrapolation is not possible in an easy manner due to the influence of the power compensation control circuits. Therefore it is necessary to calibrate the calorimeter on cooling. A smectic-nematic phase transition can be used for this calibration. For four different power compensated DSC a deviation between temperature scales up to 0.7 K in heating and cooling mode is observed.
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