Two wire current transmitter with adjustable current control lin

Details Two wire current transmitter with adjustable current control lin Two wire current transmitter with adjustable current control lin

1978-03-13

1980-05-27

Caldwell, Sr., John W.

Communications: electrical

Systems

Call station

73362AR, 323 69, 323 75H, 323 75N, 324DIG1, 340186, 340210, G08C 1904, G01K 724

Patent

active

042053277

ABSTRACT:
A two wire current transmitter for controlling the total current in the two wires in accordance with a value of a parameter to be sensed, which provides for substantial linearization of the electrical characteristic representative of the value of the parameter to be sensed by adjusting the current from an adjustable current control to substantially compensate for the nonlinear relationship of the parameter to be sensed versus the electrical output of the sensor of said parameter. The circuit also provides for substantial compensation for sensor lead wire effects.

REFERENCES:
patent: 3562729 (1971-02-01), Hurd
patent: 3573599 (1971-04-01), Rose
patent: 3680384 (1972-08-01), Grindheim
patent: 3754442 (1973-08-01), Arnett
patent: 3764880 (1973-10-01), Rose
patent: 3887864 (1975-06-01), Knudsen
patent: 3898554 (1975-08-01), Knudsen
patent: 3975719 (1976-08-01), Frick
patent: 4016763 (1977-04-01), Grindheim

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