MPX15 Application Example

A survey at the Roman town of Wroxeter highlights the value of resistivity surveying with different probe configurations and separations. An RM15 resistance meter, MPX15 multiplexer and PA5 probe array with medium wings was configured with six probes, to make simultaneous 0.25m, 0.5m, 0.75m, 1.0m, 1.25m and 1.5m Twin measurements, along with 0.5m Wenner and Double-Dipole measurements at each reading station - the newer PA20 can be configured in the same way with a 1.5m beam. These  data sets, shown below, reveal different structures at the different probe separations. The narrower spacings emphasise the cellular nature of the buildings and internal partitions whilst the wider spacings reveal more substantial, underlying internal structures, along with lines of external colonnades. All data sets have been despiked, edge-matched, high-pass filtered, normalised and interpolated using Geoplot.

MPX15 Multiplexer