S&C recently completed surge prevention system design and start-up services for two multi-stage compressors: a syn gas compressor and a process air compressor. For this project, S&C provided all of the site support, schedule control, programming, and system integration testing for the customer. Both compressors lacked manufacturer compressor maps. Therefore, S&C engineers recorded the operating conditions of the train prior to a surge test in order to build the compressor maps. OptiRamp recorded main process variables and the ActiveX visualization was used to monitor the position of the operating line with relation to the surge line.