A method and a device for detecting signal amplitudes by removing any DC component from the signal and then shifting the signal by a shift amount so as to produce a shifted signal having a first signal level equal to a reference level. The grooves improve cooling efficiency by forcing the cooling fluid sprayed from a test temperature deviation compensating system onto the carrier module to spread throughout substantially an entire surface of the semiconductor device, and to remain in the carrier module for a period of time before being discharged. In order to seal the extensible member against an internal surface of the cylindrical housing, the extensible member includes a sealing member defining a plurality of grooves.