Method and apparatus for capacitance temperature...

Details Method and apparatus for capacitance temperature... Method and apparatus for capacitance temperature...

G - Physics

01

L

G01L 13/06 (2006.01) G01L 9/12 (2006.01)

Patent

CA 2119437

ABSTRACT OF THE DISCLOSURE A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having compensation capacitance MACDA or a digital removable module having compensation capacitance CDD. Capacitance compensation circuitry is included in the fixed module which includes a compensation capacitance CDM which is selected whereby MACDA equals CDD when the analog removable module and the digital removable module are calibrated. This provides a pressure transfer function which is more linearized and less susceptible to temperature variations.

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