Abstract: The present invention relates to a method for determining the position of a robotic arm in an automatic liquid handling system in which a measurement probe with a first electrode is arranged on the robotic arm and, together with a second electrode formed by at least part of a working area or at least part of a container or container carrier forms a measurement capacitor that is operatively connected to a measurement unit for measuring an impedance, in particular a capacitance of the measurement capacitor. The method involves moving the measurement probe along a first path, detecting a first change in the impedance, in particular in the capacitance of the measurement capacitor at a first point on the first path, and defining at least one first reference spatial coordinate for a control unit of the robotic arm on the basis of the first point on the first path.

Abstract: The present invention relates to a method for determining the position of a robotic arm in an automatic liquid handling system in which a measurement probe with a first electrode is arranged on the robotic arm and, together with a second electrode formed by at least part of a working area or at least part of a container or container carrier forms a measurement capacitor that is operatively connected to a measurement unit for measuring an impedance, in particular a capacitance of the measurement capacitor. The method involves moving the measurement probe along a first path, detecting a first change in the impedance, in particular in the capacitance of the measurement capacitor at a first point on the first path, and defining at least one first reference spatial coordinate for a control unit of the robotic arm on the basis of the first point on the first path.

Abstract: A device has at least one channel for detecting the phase boundary between media in a liquid container and has a probe which can be fed in the direction of the phase boundary and a circuit which processes a signal of the probe to detect a capacitance change. The device includes a testing module which executes an infeed movement of the probe. The testing module performs an analysis of the signal of the channel, and makes a connection statement about the electrical connection between the probe and the measuring circuit. The testing of the electrical connections is performed in a dry manner, i.e., a phase boundary does not have to be searched for or penetrated for the testing.

Abstract: A device has at least one channel for detecting the phase boundary between media in a liquid container and has a probe which can be fed in the direction of the phase boundary and a circuit which processes a signal of the probe to detect a capacitance change. The device includes a testing module which executes an infeed movement of the probe. The testing module performs an analysis of the signal of the channel, and makes a connection statement about the electrical connection between the probe and the measuring circuit. The testing of the electrical connections is performed in a dry manner, i.e., a phase boundary does not have to be searched for or penetrated for the testing.