In order to improve the reliability and applicability of performance testing system for centrifugal pumps and enhance the automatic degree of testing process at the same time,the structure of a kind of general automatic testing system was constructed in this study. Programmable logic controller( PLC) or data acquisition card was selected as the sensor for signal sampling and the controller for the pumps and valves in the system. Moreover,a touch screen was used as the human-machine interaction. The system s...