A method and apparatus for testing a capacitively operating measuring device, which is designed for the detection of phase boundaries, and accordingly equipped laboratory device.

摘要

The invention relates to a device (110) with at least one channel for detecting the phase boundary between the media in a liquid container. The channel includes a sensor (3.1-3.8), which is deliverable in the direction of the phase boundary. The device (110) comprises a circuit (2, 7, 8), which processes a signal of the sensor (3.1-3.8) in order to detect a change in capacitance. Moreover, the apparatus (110) comprises a test module (20) which is adapted to a feed movement (B1-B8) of the probe (3.1-3.8) run. The test module (20) carries out an evaluation of the signal of the channel, and makes a connection message via the electrical connection (14) between the sensor (3.1-3.8) and the measurement circuit (13). The examination of the electrical connections (14) is carried out in accordance with the invention in the dry, ie, it must be searched or penetrated for checking any phase boundary.