Process and apparatus for monitoring the functioning of valves

摘要

The method involves optical detection of a change in the indicated operating state with an optical sensor (17), defining the change as a starting time, measuring a pressure change at the valve (12) output from the starting time and generating an associated pressure-dependent signal and verifying the switching state of the valve by checking whether a defined pressure signal (28) exists after a defined time from the starting time. An independent claim is also included for a device for functional monitoring of valves for fluid controls.