Patent ID: 11867579
Assignee: EUROIMMUN MEDIZINISCHE LABORDIAGNOSTIKA AG
Field: Measurement (Instruments)
Classification: CPC B  G | IPC G

Claim 0:
1. A method for detecting an error state when aspirating a liquid, including
immersing a tip of an aspiration needle in the liquid
generating a negative pressure in the aspiration needle for a predefined time period to aspirate a predetermined partial volume of the liquid into the aspiration needle
continuously acquiring a sensor signal curve (SK) via continuous measurement of a sensor signal, which indicates a pressure in the aspiration needle, during an overall time period (TG), which comprises the predetermined time period (TD) and furthermore a further time period following the predetermined time period (TD),
providing a reference signal curve (RK),, characterized by
determining a deviation measure (IN), which indicates a deviation of the sensor signal curve (SK) from the reference signal curve (RK) for the further time period (TW),
providing a predetermined second threshold value (SW2),
detecting the error state in the case that the sensor signal falls below a first threshold value (SW1) during the predetermined time period (TD) or detecting the error state after expiration of the further time period (TW) in the case that the deviation measure (IN) deviates sufficiently from the second threshold value (SW2).