PRIME is the BOGE machine controller for oil free screw compressors. A large-scale, back-lit LC display with clear text output shows the fault and maintenance messages, operating modes and all operating parameters clearly arranged in three main displays. Volume flow and pressure characteristics are graphically displayed and freely scalable. Due to the modular design optional displays - for example pressure dew point - can be easily added. The PRIME control has an integrated real-time clock and a switch clock function enabling it to evenly control external equipment. Communication is achieved via RS 485 interfaces or potential-free signalling contacts.