Load cell with modular calibration components

Details Load cell with modular calibration components Load cell with modular calibration components

G - Physics

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G01L 25/00 (2006.01) G01G 3/12 (2006.01) G01G 3/14 (2006.01) G01G 3/18 (2006.01) G01G 23/01 (2006.01) G01L 1/22 (2006.01)

Patent

CA 2141635

A digital load cell includes an EEPROM that is permanently attached to the counterforce along with a temperature sensor and a plurality of strain gages. The strain gages are mounted on the counterforce in the electrical configuration of a full wheatstone bridge. The EEPROM and bridge are connected to a flexible circuit that is detachably connectable in electrical communication with circuits including a processor and an analog-to-digital converter, which can be mounted permanently on a local circuit board physically separated from the EEPROM. The local circuit board operates in a manner so that the EEPROM can be programmed to store the calibration/correction factors that are to be applied by the processor to the digital weight signals from the analog-to-digital converter. The local circuit board is associated with, and alternatively can be removably attachable to, the counterforce.

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