Method for testing a laboratory device and correspondingly equipped laboratory device

摘要

#$%^&*AU2010238546B220141204.pdf#####Abstract The invention relates to devices for liquid level detection (LLD). It relates to a laboratory device (100) having an electronic circuit (2) for detecting a liquid level 5 in a liquid container (5), a feeler (3), which can be advanced, and which is connected to an input side (6) of the electronic circuit (2), and having a movement device, which allows the feeler (3) to be advanced in the direction of the liquid (1) in the liquid container (5). Upon the immersion of the feeler (3) in the liquid (1), a capacitance change is caused in the electronic circuit (2), which 10 triggers a signal in the circuit (2). The laboratory device (100) comprises a reference circuit (20), which is connected to the input side (6) of the circuit (20), and which specifies an effective capacitance on the input side (6) of the circuit (2). A sequence controller (30) is used, which causes the triggering of a test by the application of a control signal (Si) to the reference circuit (20), the control 15 signal (S1) causing an increase of the effective capacitance through a switching procedure. The processing of the corresponding capacitance change is monitored by the sequence controller (30), for example. 20 (Figure 3)2/7 30 100 6 8 s(t): 31 B LLD /LAC 2 C1 20 21 4 Fig. 3 t Fig. 4A A t Fig. 4B