Patent ID: 7106067
Filing Date: 2006-09-12
Classification: G01N,G01R

Abstract:
1. A calibration plug for providing resistance simulation for calibration of a toroidal conductivity sensor comprising: a resistive element having a predetermined non-adjustable electrical resistance; a loop cable having a proximal end and a distal end; said proximal end being electrically coupled to one side of said resistive element; said distal end being removably coupled to another side of said resistive element; wherein said resistive element is electrically couplable in series between said proximal end and said distal end of said cable; the toroidal sensor including one or more toroidal coils defining a central bore extending therethrough, a cell factor, and a full scale conductivity value; said loop cable being configured for forming one or more loops extending through the bore with the proximal and distal ends electrically coupled to said resistive element to provide a predetermined calibration resistance; the predetermined electrical resistance value of the resistive element being determined in accordance with the following equation: wherein N is the number of said loops; wherein said full scale conductivity value is the conductivity value of one loop; the calibration plug further including indicia identifying one or more toroidal conductivity sensors for which the plug is configured; and wherein the calibration plug is a discrete unitary device.