Method and filling system for pressure-filling containers

A method for pressure-filling a container with a liquid filling material using a filling system comprising a filling element group, said filling element group comprising a plurality of filling elements, wherein, during a first treatment phase, said container is arranged in a sealed position at a filling element from said plurality of filling elements and pre-pressurized with an inert gas to a counter-pressure, said counter-pressure being selected from the group consisting of a clamping pressure and a filling pressure, wherein, during a second treatment phase, said container is filled against said counter-pressure, wherein during a third treatment phase following said second treatment phase, said container is relieved to ambient pressure, wherein treatment duration of said treatment phases is determined by a timing control, and wherein, during all treatment phases, a pressure profile of an internal pressure of said container is detected, said method comprising with a pressure-measuring device, detecting an internal-pressure profile of a selected container only at a first filling element of said filling element group, and based at least in part on said internal-pressure profile, for all treatment phases of all filling elements of said filling element group, carrying out a step selected from a first group of steps, wherein said first group of steps consists of monitoring treatment duration, and correcting treatment duration.