A framework may be provided for facilitating adoption of mathematical and logical solvers. The direction of incidence, the attenuation and the delay times of connection paths used for beam forming for signal sections for channel estimation purposes are determined from the transmissions of the other radio station in a known manner. Then at least one wavelength of light in the glucose-dependent optical signal from the fluorophore may be detected with a detector to produce a detected light signal, which may be processed to produce a glucose metric, such as a glucose concentration metric. Further, the instrument can include first and second arms adapted for movably connecting the first and second towers to the rack, and one or more intermediate arms adapted for movably connecting the intermediate tower to the rack. In order for the protective layer to develop sufficient effectivity, it must be applied with an original thickness of at least 20 nm, preferably at least 50 nm and particularly preferred at least 100 nm.