A portable communication device detects a current speed of travel of the portable communication device independent of any vehicle temporarily transporting the portable communication device. At least one of the first-direction and second-direction shift registers includes a transfer start control unit for selectively allowing at least two predetermined stages capable of starting transfer among the plurality of stages to start generating a transfer signal. An additional solid body or liquid bath having a high heat capacity and heat conductance is coupled to the column and to an inlet capillary of the column such that the inlet capillary and the column are enclosed by said solid body or liquid bath.