The force-measuring device includes a measuring unit and a reference unit, the latter serving to deliver a reference quantity, a reference current or a reference voltage, through which the force of a measurement object which is to be determined can be measured by the measuring unit. One of the diluents is allowed to pass through a fraction loop so as to direct a fractioned component held in the fraction loop to a trap column together with a mobile phase. The difference between the obtained coordinates and the coordinates of the center of the reference sphere before updating of the probe is obtained to thereby calculate a predicted probe vector. Once installed, the tool bit cover can be unlocked via actuation of a trigger disposed on the body of the tool or on the cartridge. Questions asked may be directed to one or more recognized standards, and duplicative questions from different standards may be omitted. Preferably light scattered by the surface within a first range of collection angles from the axis is detected by a first detector and light scattered by the surface within a second range of collection angles from the axis is detected by a second detector.