Abstract: A recording card for the measurement of physical parameters includes at least one analogue-digital converter and at least one input connector for connection to a sensor. The recording card further includes a voltage source and a reference resistance arranged in series between the voltage source and a pin on the input connector. The analogue-digital converter has a reference input supplied with a voltage taken from the pins of the reference resistance and a conversion input supplied with a voltage taken from the pins of the input connector.

Abstract: A multichannel acquisition system for measuring physical quantities includes a plurality of acquisition modules each constituting at least one acquisition channel. At least one of the acquisition modules includes synchronizing elements for transmitting a synchronizing signal to at least another acquisition module, in response to a synchronization instruction. The synchronizing signal can be optically transmitted, by magnetic coupling or by radio waves.

Abstract: The invention relates to a recording card for the measurement of physical parameters. Said card comprises at least one analogue-digital converter and at least one input connector for connection to a sensor. According to the invention, said recording card further comprises a voltage source and a reference resistance arranged in series between said voltage source and a pin on the input connector. The analogue-digital converter comprises a reference input supplied with a voltage taken from the pins of said reference resistance and a conversion input supplied with a voltage taken from the pins of the input connector.

Abstract: The invention relates to a system for detecting the incomplete closure of the doors of a chamber with at least two doors (14, 16), one an inner door and the other an outer door, arranged one behind the other in front of an orifice of the said chamber and mounted pivotally between an open position and a closed position about two parallel pivot axes (18, 24) respectively.The detection system comprises an active element (34) capable of causing an action in a particular direction and a sensor element (36) sensitive to the said action, the said elements being fastened one to the inner door (14) and the other to the outer door (16) at a point located opposite the other element, in such a way that the sensor element is in the line of action of the active element only when the two doors are closed correctly.