Method and device for monitoring a system

A method for monitoring a system in which a datum-line display is generated on a viewing screen for at least one parameter of the system as follows:

• logging of a variation with time of the values of the parameter concerned,
• determination of a base value for the parameter concerned,
• determination of an instantaneous deviation between the base value and the current parameter value or a current mean value of a specified group, containing the current parameter value, of consecutive parameter values,
• creation of a baseline representing the base value,
• display of the baseline on the viewing screen in such a way that the baseline extends horizontally on the viewing screen and with a specified length,
• creation of a continuous curve that represents the variation with time of the parameter values for a specified time period and is normalized with respect to the baseline,
• display of the continuous curve on the viewing screen in such a way that its time axis extends horizontally on the viewing screen and that the continuous curve on the viewing screen essentially extends over the entire length of the baseline,
• creation of a deviation bar that represents the instantaneous deviation and is normalized with respect to the baseline,
• display of the deviation bar on the viewing screen in such a way that it extends vertically on the viewing screen from the level of the baseline.