Abstract: A load cell system (10) having a frame (12) to which upper compliance assembly (14) is connected. A load cell (16) is connected to upper compliance assembly (14) and lower compliance assembly (18) is connected to load cell (16). In preferred embodiments, load cell system (10) includes fixed overload limit (26), moving overload limit(28), and anti-rotation device (24). In a still further embodiment, load cell system (10) includes a data transmission and receiver device (65) for transmitting and receiving data to and from load cell (16).

Abstract: A balanced bridge chopper circuit including four metal oxide semiconductor field effect transistors (MOSFETs) is driven by a remote oscillator connected through an isolator to modulate low-voltage low-frequency input signals at their remote source into a square wave A.C. output signal that can be conducted to a common point where it is amplified and demodulated for better linear measurement of said low-voltage signals. The oscillator is connected through the isolator to the bridge circuit in such a manner that opposing pairs of the bridge transistors are simultaneously conducting. The isolator may comprise a novel photovoltaic isolation device or it may consist of an isolation transformer or of other types of electrical isolation devices.

Abstract: A balanced bridge chopper circuit including four metal oxide semiconductor field effect transistors (MOSFETs) is driven by a remote oscillator connected through an isolator to modulate low-voltage low-frequency input signals at their remote source into a square wave A.C. output signal that can be conducted to a common point where it is amplified and demodulated for better linear measurement of said low-voltage signals. The oscillator is connected through the isolator to the bridge circuit in such a manner that opposing pairs of the bridge transistors are simultaneously conducting. The isolator may comprise a novel photovoltaic isolation device or it may consist of an isolation transformer or of other types of electrical isolation devices.

Abstract: A load cell system (10) having a frame (12) to which upper compliance assembly (14) is connected. A load cell (16) is connected to upper compliance assembly (14) and lower compliance assembly (18) is connected to load cell (16). In preferred embodiments, load cell system (10) includes fixed overload limit (26), moving overload limit(28), and anti-rotation device (24). In a still further embodiment, load cell system (10) includes a data transmission and receiver device (65) for transmitting and receiving data to and from load cell (16).