Remotely calibratable instrument system

Details Remotely calibratable instrument system Remotely calibratable instrument system

G - Physics

01

F

324/3, 340/71

G01F 25/00 (2006.01) G01D 18/00 (2006.01) G08C 19/02 (2006.01)

Patent

CA 1258691

Abstract of the Disclosure A two-wire, admittance-responsive instrument system in which a transmitter, receiver and calibrator are connected by a two-wire transmission line is disclosed. The calibrator repetitively transmits a calibration enabling signal causing the transmitter to increment a reference admittance for comparison to a sensed admittance corresponding to a known physical condition. The calibrator monitors the bistable output signals transmitted by the transmitter in the calibration mode, which changes state when the incremented reference admittance bears a predetermined relationship to the sensed admittance. The calibrator may then transmit additional calibration enabling signals causing preload to be established for transmitter operation.

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