Advanced pc retrofit from prime technologies are specially designed for gear roll tester, gear mas iii. This is a measurement and analysis system. Gear mas iii can be with double flank gear roll tester of any make like carl mahr, goulder mikron, osaka or any indian makes. These system consists of lvdt probe/pick up; signal conditioning electronics; filter electronics; adc electronics; gear mas iii software for roll tester, linear glass scale; and counter card. The center distance varies according to the errors of gear by the rolling measurer gear. An axial lvdt probe can measure this variation. The analogue output is digitized by adc electronics. Standard features include Evaluation of following parameters as per din 3963. Fi" - double flank tooth error, fi" - double flank rotational deviation [total composite error], fr - runout error/eccentricity error, qualitative analysis of involute curve and pressure angle error graph; entire din table pre installed; facility for user configurable tolerance; automatic detection of din grade measured job data; provision of archive/recall of standard and history data; built-in hardware diagnostics and software calibration facility; generation of multicolour scaled reports in graphical format; user friendly and menu driven operation.