The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 2006
Filed:
Feb. 23, 2005
John K. Quackenbush, Middleboro, MA (US);
Stephen B. Talutis, Milton, MA (US);
John K. Quackenbush, Middleboro, MA (US);
Stephen B. Talutis, Milton, MA (US);
Invensys Systems, Inc., Foxboro, MA (US);
Abstract
A calibration plug provides resistance simulation for calibrating toroidal conductivity sensors. This calibration plug includes a resistive element of predetermined electrical resistance coupled in series between electrical leads which may be engaged with a circuit element to form an electrical circuit. The toroidal sensor includes one or more toroidal coils defining a central bore extending therethrough, a cell factor, and a full scale conductivity value. The predetermined resistance of the resistive element is determined in accordance with the following equation: and the calibration plug further includes indicia identifying one or more toroidal conductivity sensors for which the plug is configured.