For more background on the Wenner Method & ASTM G57, visit this article.
If you would like to perform this method using the MiniSting™, visit this article.
Note: If a-spacing is not updated on each reading, the ohm-m/ohm-ft will not be correct. Update the a-spacing on each new electrode placement as per the Wenner array shown below and your projects a-spacing requirements (each project will be specific).
Note: Sometimes output/source voltage is needed. The STG file must be downloaded to check the Hvolt column. The record # can be linked to the spacing/measurement needed on each Hvolt reading. It is common to take several readings at each spacing so the one saved on a log sheet may skip some values in the STG. If the record # is written in the log sheet, it can be linked later. The minimum data needed is V/I and a-spacing with some mention of the error threshold accepted like 2% standard deviation