Patent EP-1878500-A1 (EP)
Inventor: MOLITOR PETER
IPC: G01F11/02
Filed: 2007-05-22
Abstract: The electronic hand device for dosing of liquids, comprises a drive (7, 8), a displacement device with a displacement chamber (9) and a displacement element (10), which are connected with the drive, an electrical voltage supply, a holding device for a pipette point, which has a passage channel that is connected with the displacement chamber, a data storage with storage locations for different calibration data concerning different pipette points and/or different liquids and/or different application conditions, and an electrical selective equipment for selecting calibration data. The electronic hand device for dosing of liquids, comprises a drive (7, 8), a displacement device with a displacement chamber (9) and a displacement element (10), which are connected with the drive, an electrical voltage supply, a holding device for a pipette point, which has a passage channel that is connected with the displacement chamber, a data storage with storage locations for different calibration data concerning different pipette points and/or different liquids and/or different application conditions, and an electrical selective equipment for selecting calibration data. An electrical control device is connected with the electrical selective device, the data storage and with the electrical driving motor of the drive and/or an electrical indicator device. The movement of the displacement element is controlled using the electric motor and/or the indication of the dosing volume by the indicator device under fallback of the selected calibration data from the data memory with the help of the selective equipment. The dosing device comprises calibration data for pipette points of different geometry and/or from different materials and/or with different surfaces and/or calibration data for different liquids and/or for different liquid types and/or calibration data for an ambient condition and/or calibration data for application and/or calibration data for user. The data storage comprises a non volatile data storage and solid stored calibration data. The dosing device has an electrical input mechanism for entering a gravimetrically determined volume and/or a density of a liquid and gravimetrically determined measure of the liquid. The control device calculates calibration data from the gravimetrically determined volume and/or from the density and the gravimetrically determined measures of a gravimetric volume. The calibration data reads in the data storage. Multi gravimetric measured values are readable using the input mechanism. The control device determines the calibration data for a multipoint calibration. The electrical selective device comprises the electrical input mechanism for entering and/or selecting calibration data of different pipette points and/or different liquids and/or different application conditions. The electrical input mechanism comprises mode key and a parameter key, whose manipulation releases that the control device controls the indication of different menus by the indicator plant or the assumption of indicated inputs. The input mechanism has a pair of electrical control keys arranged side by side and the electrical control device controls the indication of menu options by the indicator plant as well as the change of parameters and their indication by the indicator plant according to the manipulation of the control keys. The electrical control device controls the displacement of the restrictor element by the electric motor according to the manipulation of the control keys. The electrical input mechanism enables the adjustment of different operating mode and/or the adjustment of dosing parameters and/or the movement of the restrictor element. The input mechanism comprises a swiveling adjusting knob for adjusting the mode of operation of the dosing device. The electrical control device comprises a microprocessor or a micro controller. The electrical voltage supply comprises power adaptor and/or a battery and/or accumulator and/or an electrical battery charger for loading the accumulator.