Simple Method for Determining Cable Length Resistance in Time Domain Reflectometry Systems

摘要: Time domain reflectometry (TDR) based electrical conductivity (EC) measurements underestimate solution (σ) as salinity increases unless a correction parameter, R cable , is incorporated into the EC calculation. The parameter accounts for series resistance of cable, connectors, and tester. main objective this study was to propose verify simple method directly measuring from load on waveguides that are shorted together. Also, dependence length vs. other resistances investigated. found be function constant probe resistance. Errors caused by ignoring in determinations increased with both Although there may cases where has negligible effect determinations, also situations it important. This shows measurement so little reason not routinely incorporate all TDR-based determinations.