Process variable transmitter
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United States of America Patent
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Dec 26, 2017
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app pub date -
Mar 14, 2014
filing date -
Mar 15, 2013
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Abstract
A process variable transmitter provides an output representing a process variable. The process variable transmitter includes a process variable sensor that provides an analog sensor signal representing a process variable, an analog to digital converter that receives the analog sensor signal from the process variable sensor and converts it to digital sensor signal values, and a compensation processor. The compensation processor calculates, in a first mode, a compensated process variable value at a first slow rate. The compensation processor calculates a compensation factor relating the compensated process variable value to an initial digital sensor signal value. The compensation processor calculates, in a second mode, a process variable estimate as a function of an updated digital sensor signal value and the compensation factor. The process variable estimate is calculated at a second rate faster than the slow rate.
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