Methods and apparatuses for forming plastics material preforms into plastics material containers with determination of a switching time delay of valves

A forming device for forming plastics material preforms into plastics material containers, wherein the forming device comprises a movable carrier on which a plurality of forming stations are arranged, wherein each of these forming stations is configured to form plastics material preforms into plastics material containers by applying a flowable medium, wherein in an operation mode each forming station is configured to apply at least two different pressure levels to the plastics material preforms for the expansion thereof, and each forming station has at least two valves for this application,

• wherein
• at least one processor device is provided which is configured to determine, at least at times, at least one measured value which is characteristic of a switching time and/or a switching time delay of at least one valve, wherein this measured value results from a pressure measured value which can be determined by a pressure measuring device.