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Abstract

A method of controlling a pipetting process for a liquid by the use of a pipetting device is suggested, the pipetting process including a calibration process and a dosing process being performed in accordance with a set of process variables wherein, before starting the dosing process for the liquid, the calibration process is carried out to determine the set of the process variables specifically for the liquid, the calibration process comprising the steps of: performing a preliminary dosing process for the liquid using a predefined reference set of the process variables, detecting a preliminary time characteristic of at least one state variable of a medium present in the pipetting device during the preliminary dosing process, and comparing the detected preliminary time characteristic of the state variable with a reference time characteristic of the state variable obtained in advance by performing a dosing process for a predefined reference liquid using the reference set of process variables. In the calibration process according to the comparison between the preliminary time characteristic of the state variable with a reference time characteristic of the state variable a new set of process variables is created which is to be used for dosing the liquid specifically. Preferably, also the volume of liquid dosed in the preliminary dosing process and/or the dosing process is detected and compared with a target volume.

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