The temperature calibration of a TA Instruments 3200-2920 DSC has been performed on cooling using the isotropic → nematic,
isotropic → cholesteric and other liquid crystal → liquid crystal transitions of thermally stable, high purity liquid crystals.
The thermal stability of these liquid crystals has been verified by measuring the temperature of the mentioned transitions
during cyclic heating and cooling experiments. Correspondence has been established between the real and indicated temperature
during cooling for all combinations of heating and cooling rates of practical interest: correction values were determined
to the indicated temperature in order to obtain the real temperature on cooling. These correction values were calculated as
the average from the temperatures of four or five different liquid crystal transitions for each heating-cooling rate combination.
The accuracy of the temperature calibration on cooling is ca. 0.2‡C for heating and cooling rates up to 20‡C min−1.