Description

Measuring the linear resistance of large-section conductors relies on mastery of the related uncertainties. Factors like exactness of the length, proper temperature of the Cable Under Test (CUT), or adequacy of the micro-ohmmeter unit may be common to most testing situations, but contacting the CUT in a way that current density is radially uniformly distributed in the section requires specific means of instrumental importance. This presentation discusses both the on-the-line and sample test measurement methods as well as the corresponding challenges in obtaining well-controlled global accuracy.