The applicator for an anti-microbial prep solution of this invention includes a generally hollow handle having a closed proximal end and an open distal end, a foam pad attached to the hollow handle over the open distal end, an ampoule that holds the anti-microbial solution therein and a means for opening the ampoule. A data processor or mode controller accesses a stored representation of first current level versus rotor speed output at which a total harmonic distortion level is less than threshold total harmonic distortion level. As well, the optical module provides common delivery and collection optics to enable measurements in both spectral regions to be collected using similar spot properties. The modeling system defines a set of components used to describe the functionality of an application. Color-coding of temporal events may also be included in the graphical representation.