Open sensor diagnostic system for temperature transmitter in a process control system
First Claim
Patent Images
1. A temperature transmitter in a process control system, comprising:
- a temperature sensor sensing a temperature and providing a sensor output related to a sensed temperature;
an A/D converter coupled to the sensor output providing a digitized output related to the sensor output;
a microprocessor coupled to the digitized output which compensates and processes the digitized output and provides a temperature output; and
comparison circuitry which compares the sensor output to a first threshold and provides an inhibit signal to the microprocessor if the sensor output is outside of the first threshold.
0 Assignments
0 Petitions
Accused Products
Abstract
A temperature transmitter in a process control system includes a temperature sensor which senses temperature and provides a sensor output related to sensed temperature. An analog-to-digital converter coupled to the sensor output provides a digitized output related to the sensor output. A microprocessor receives the digitized output, compensates the digitized output and provides a temperature output. Comparison circuitry compares the sensor output to a first threshold and provides an inhibit signal to the microprocessor if the sensor is outside of the first threshold.
89 Citations
21 Claims
-
1. A temperature transmitter in a process control system, comprising:
-
a temperature sensor sensing a temperature and providing a sensor output related to a sensed temperature; an A/D converter coupled to the sensor output providing a digitized output related to the sensor output; a microprocessor coupled to the digitized output which compensates and processes the digitized output and provides a temperature output; and comparison circuitry which compares the sensor output to a first threshold and provides an inhibit signal to the microprocessor if the sensor output is outside of the first threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of measuring temperature of a process in a process control system, comprising the steps of:
-
obtaining a sensor input related to temperature of the process; providing a digitized output related to the sensor output; compensating the digitized output and providing a compensated output indicative of temperature of the process; comparing the first sensor input with a threshold; and providing an error signal based upon the comparison. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
-
Specification