ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,474,193, issued on Nov. 18, was assigned to ROSEMOUNT TANK RADAR AB (Molnlycke, Sweden).
"Alarm handling in loop-powered field device" was invented by Leif Nilsson (Linkoping, Sweden), Tobias Lilja (Sturefors, Sweden) and Hans Arkesten (Borensberg, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "A field device comprising measurement circuitry; loop current circuitry; voltage measurement circuitry; and a controller configured to: acquire a first value of a process variable; determine if the voltage received by the field device is sufficient to support a first loop current; control, when the voltage is insufficient to support the first loop current,...