If the chromatography software you already have can export chromatogram file of AIA format (with suffix of *.cdf), then no extra analog/digital acquisition hardware is needed.

According to the RI peak and the UV peak of a standard sample with the known Mn and the known time lap between the two peaks, a three order polynomial standard curve of molecular weight vs. time is obtained.

Mw, Mn, percentage of substance with Mw<8000, and the curve of cumulated molecular weight distribution are automatically generated in the user report. 

Peak slices details can also be generated in the user report.