A label printer system includes a disk storage medium including a thermally-sensitive layer formed on at least a portion of an upper surface. The first AD conversion unit performs AD conversion of an analog signal in a first period to generate an upper-bit digital signal. The loading member includes a base film having a melting point higher than a thermal equilibrium temperature thereof, wherein the thermal equilibrium temperature is achieved due to heat transfer from the semiconductor die under test to the base film via the adhesive layer. The first supporting element rotation module is configured to rotate the first supporting element until text that is imprinted on a first side of a semiconductor wafer is located within a field of view of the first optical head. The method can be performed in plurality simultaneously with fluorescence of absorbance readouts.