Abstract: A support grid for filling material packings includes plate-shaped support strips which extend perpendicularly to an installation plane and are connected in a cruciform manner to spacer strips also extending perpendicularly to the installation plane. Contour strips which are provided with openings and are disposed at an angle and at a distance from one another, are placed in the direction of the spacer strips. The size of the openings as well as the distances are selected in such a way that supported filling material cannot penetrate. The maximum cross-section of the openings amounts to 90 percent. A method for mounting a support grid for filling material packings, is also provided.

Abstract: A test device for at least one LED strip contains: a voltage source, by way of which a cold test voltage or a warm test voltage can be applied to a parallel circuit formed of a test resistor and the LED strip, and an evaluation unit which records the cold test current flowing when a cold test voltage is present and diagnoses an error if the cold test current deviates from a required value by an above-the-threshold amount. A test device contains a switching element connected in series with the test resistor and an error circuit connected to the at least one LED strip, which during the warm testing records an over-the-threshold deviation of a current flowing through the at least one LED strip from a pre-specified value and for an over-the-threshold deviation opens the switching element.

Abstract: In order to determine a position of a transmitter in three dimensions, a signal transmitted by the transmitter is received by four receivers that are separated from one another in three dimensions and are not all disposed on the same plane. In which case the time intervals between a reception of the signal by the four receivers are used to determine the position of the transmitter, taking into account the configuration of the receivers and a propagation speed of the signal in space.