Patent ID: 7694591

Claim:
Method of evaluating a dosing operation, carried out by means of a dosing pump, for dosing a liquid medium in a vessel, filled at least partially with a gas, said method comprising: detecting a development, with respect to time, of a pressure or of a temperature of the gas present in the vessel at least periodically during the dosing operation, comparing a detected development, with respect to time, of the pressure or of the temperature, with a desired value development, prescribed for a control unit of the dosing pump, of a pump rate or pump output determining the dosing operation, and issuing an evaluation result in dependence on the determined comparison, wherein the dosing operation is evaluated to be faulty or in need of correction when it is determined that at least a portion of the detected development, with respect to time, of the pressure or of the temperature with the prescribed pump rate or prescribed pump output lies outside a desired value range, and wherein a plurality of error conditions for the evaluation of the dosing operation are used, which consider the development of the pressure or of the temperature in a time window after a prescribed change in the defining prescribed pump rate or pump output.