Method for checking and/or monitoring the tightness of a plurality of pneumatically or hydraulically actuated actuators, and machine, especially medical treatment machine

摘要

A method is provided of monitoring the leak tightness of a plurality of pneumatically or hydraulically actuated actuators of a machine, in particular a plurality of valve actuators of a medical treatment machine, in which pressure is exerted on the actuators in different combinations during operation of the machine. A common pressure drop occurring during a stationary operating phase at the actuators on which pressure is exerted in the respective combination is measured for a plurality of different combinations of actuators on which pressure is exerted. A respective leak tightness value is determined for individual actuators and/or groups of actuators, with the pressure drop measured for those combinations and in which the respective actuator and/or the respective group of actuators on which pressure is exerted being accounted for in the leak tightness value. A machine, in particular a medical treatment machine, is configured to effect the valve actuator monitoring.

主权项

1. A method of monitoring a leak tightness of a plurality of pneumatically or hydraulically actuated valve actuators of a medical treatment machine that has a central pressure supply providing the plurality of valve actuators with pressure, said method comprising the following steps:
exerting a pressure on the valve actuators in different combinations during operation of the medical treatment machine; measuring a plurality of pressure drop values of the central pressure supply during a stationary operating phase for a plurality of different combinations of the valve actuators on which the pressure is exerted; and determining for at least one of individual valve actuators and individual groups of valve actuators, a leak tightness value based on the pressure drop values measured combinations in which the pressure was exerted on the at least one of the individual valve actuators and the individual groups of valve actuators for which the leak tightness value is determined, said steps of exerting, measuring, and determining being performed while a medical treatment is being effected with the medical treatment machine.