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</center><p>It begins with an introduction to DCVG surveys, explaining that they involve soil-to-soil potential difference measurements to locate coating defects on cathodically protected pipelines. The physical principles associated with DCVG surveys are discussed in Section II and the setup procedures of MCM’s data loggers for the performance of DCVG surveys are  The physical principles associated with DCVG surveys are discussed in Section II and the set-up procedures of MCM’s data loggers for the performance of DCVG surveys are  Direct Current Voltage Gradient Survey. Finally, Section VI describes how to copy DCVG survey files to a PC Principle of the DC Voltage Gradient Technique. Section II describes the physical principles, including how coating defects create localized areas of high potential and The larger the fault the greater the current flow and hence voltage gradient and this is utilised in the technique to The physical principles associated with DCVG surveys are discussed in Section II and the setup procedures of MCM’s data loggers for the performance of DCVG surveys are described in Section III. Section IV details the equipment hookup requirements for DCVG surveys and how to actually conduct a DCVG survey is presented in Section V The physical principles associated with DCVG surveys are discussed in Section II and the set-up procedures of MCM’s data loggers for the performance of DCVG surveys are described in Section III. Section IV details the equipment hookup requirements for DCVG surveys and information on how to actually conduct a DCVG survey is presented in The document is a training manual for using the Gx data logger to perform DCVG surveys. Close Interval Potential Survey and DC Voltage Gradient) in one integrated Section II and the procedures to setup the data-logger for a DCVG survey are detailed in Section III. Sections IV and V outlines the equipment hook-up requirements for DCVG surveys and how to actually conduct a DCVG survey, respectively. In Cathodic Protection when current flows through the resistive soil to the bare steel exposed at faults in the protective coating, a voltage gradient is generated in the soil. Corrosion normally occurs where the bare metal surface of a pipeline comes in contact with its surrounding electrolyte (water and soil) The NACE International Standard Practice SP Standard Practice Performing Close-Interval Potential Surveys and DC Surface Potential Gradient Surveys on Buried  The paper describes the theoretical and practical aspects of merging two indirect inspection tools (i.e.</p></translate>
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