A test point monitor is disclosed which includes, a processor, a cellular modem interfaced to the processor, and at least one analog sensor interfaced to the processor. The invention provides a process for purifying a bacterial capsular polysaccharide, comprising the steps of precipitation of said polysaccharide, followed by solubilization of the precipitated polysaccharide using ethanol. The filter adaptation is performed on the basis of an error signal delivered by a slicer 128 which operates on synchronous samples after timing recovery and sample reconstruction.