Method for operating a dosing device
US10900983B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2017 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Jun 12, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/1025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for operating a dosing device comprising a control unit, a dosing unit with a cannula of a first volume, and a sampling container connected to the cannula. The method comprises moving the dosing unit in a first direction along an axis to move the cannula into a vessel containing a liquid; constantly aspirating fluid through the cannula with a predetermined volumetric flow; measuring at least one optical parameter of the aspirated fluid; when a change of the optical parameter is detected, storing a first position of the dosing unit on the axis and interrupting the movement of the dosing unit; and calculating a second position of the dosing unit on the axis at which the tip of the cannula has penetrated a first phase boundary upon immersion into the liquid. The calculation is performed on the basis of the first position, the predetermined speed, the first volume and the predetermined volumetric flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.