Process variable sensor testing

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United States of America Patent

PATENT NO 11181403
APP PUB NO 20210088365A1
SERIAL NO

16580266

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Abstract

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A process transmitter includes a process variable sensor, a test circuit, a switch and a controller. The process variable sensor includes a sensor output that is indicative of a sensed process variable. The test circuit is configured to detect a condition of the process variable sensor. The switch is configured to selectively connect the test circuit to the process variable sensor and disconnect the test circuit from the process variable sensor. The controller is configured to obtain a measurement of the process variable, control the switch, detect a condition of the process variable sensor by comparing the sensor output when the test circuit is connected to the process variable sensor to the sensor output when the test circuit is disconnected from the process variable sensor, and communicate the condition in the measurement to an external control unit.

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Patent Owner(s)

Patent OwnerAddress
ROSEMOUNT INC12001 TECHNOLOGY DRIVE EDEN PRAIRIE MN 55344

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Louwagie, Bennett Leon Plymouth, US 1 1
Wienhold, Nicholas Aaron Waconia, US 9 10

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