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1. WO2021061202 - PROCESS VARIABLE SENSOR TESTING

Publication Number WO/2021/061202
Publication Date 01.04.2021
International Application No. PCT/US2020/031008
International Filing Date 01.05.2020
IPC
G01R 31/28 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
28Testing of electronic circuits, e.g. by signal tracer
CPC
G01B 7/18
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
7Measuring arrangements characterised by the use of electric or magnetic means
16for measuring the deformation in a solid, e.g. by resistance strain gauge
18using change in resistance
G01D 18/00
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
18Testing or calibrating of apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
G01D 21/00
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
21Measuring or testing not otherwise provided for
G01D 21/02
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
21Measuring or testing not otherwise provided for
02Measuring two or more variables by means not covered by a single other subclass
G01K 3/005
GPHYSICS
01MEASURING; TESTING
KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
3Thermometers giving results other than momentary value of temperature
005Circuits arrangements for indicating a predetermined temperature
G01K 7/16
GPHYSICS
01MEASURING; TESTING
KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
7Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat
16using resistive elements
Applicants
  • ROSEMOUNT INC. [US]/[US]
Inventors
  • LOUWAGIE, Bennett Leon
  • WIENHOLD, Nicholas Aaron
Agents
  • CHAMPLIN, Judson K.
Priority Data
16/580,26624.09.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS VARIABLE SENSOR TESTING
(FR) TEST DE CAPTEUR DE VARIABLE DE PROCESSUS
Abstract
(EN)
A process transmitter (102) includes a process variable sensor (104), a test circuit (130), a switch and a controller (120). The process variable sensor (104) includes a sensor output (126) that is indicative of a sensed process variable. The test circuit (130) is configured to detect a condition of the process variable sensor (104). The switch (132) is configured to selectively connect the test circuit (130) to the process variable sensor (104) and disconnect the test circuit (130) from the process variable sensor (104). The controller (120) is configured to obtain a measurement of the process variable, control the switch (132), detect a condition of the process variable sensor (104) by comparing the sensor output (126) when the test circuit (130) is connected to the process variable sensor (104) to the sensor output (126) when the test circuit (130) is disconnected from the process variable sensor (104), and communicate the condition in the measurement to an external control unit (110).
(FR)
L'invention concerne un émetteur de traitement (102) comprenant un capteur de variable de processus (104), un circuit de test (130), un commutateur et un dispositif de commande (120). Le capteur de variable de processus (104) comprend une sortie de capteur (126) qui indique une variable de processus détectée. Le circuit de test (130) est configuré pour détecter un état du capteur de variable de processus (104). Le commutateur (132) est configuré pour, sélectivement, connecter le circuit de test (130) au capteur de variable de processus (104) et déconnecter le circuit de test (130) du capteur de variable de processus (104). Le dispositif de commande (120) est configuré pour obtenir une mesure de la variable de processus, commander le commutateur (132), détecter un état du capteur de variable de processus (104) par la comparaison de la sortie du capteur (126) lorsque le circuit de test (130) est connecté au capteur de variable de processus (104) à la sortie de capteur (126) lorsque le circuit de test (130) est déconnecté du capteur de variable de processus (104), et communiquer l'état dans la mesure à une unité de commande externe (110).
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