Field transmitter built-in test equipment

G - Physics – 01 – R

Patent

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G01R 27/14 (2006.01) G01R 31/28 (2006.01)

Patent

CA 2169722

An improved error detection for microprocessor-based transmitters in two-wire process control loops operating in the process control industry. In particular, techniques are shown which are useful in solving malfunctions or failures of microprocessor-based transmitters. When the transmitter is energized, the impedance of the process loop cabling is resolved and stored, displayed or transmitted as desired. The loop impedance is used to calculate potential of a power supply used to power the control loop. This information is used in testing the two-wire loop.

Système amélioré de détection d'erreur pour des émetteurs à microprocesseur dans des boucles de commande de processus à deux fils utilisés dans l'industrie de contrôle de processus. En particulier, ces techniques sont utiles pour résoudre les problèmes de dysfonctionnement ou les défaillances d'émetteurs à microprocesseur. Lorsque l'émetteur (6) est excité, l'impédance du câblage de la boucle du processus est résolue et mémorisée, affichée ou transmise. L'impédance de la boucle est utilisée pour calculer le potentiel d'une alimentation électrique utilisée pour alimenter la boucle de commande. Ces informations sont utilisées pour tester la boucle à deux fils.

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