Two (or more) day’s work can be combined quickly and safely using a text editor. 856 readings, at one reading per minute, is over Fourteen hours work (nonstop). The TAR-3 Resistance Meter Line Mode can process 999 readings per line which is enough for lines of Ninety-Nine probes and Nine deep (856 readings in total). Users should use the appropriate scaling factor to calculate the resistivity (or apparent resistivity) if required. NB The TAR-3 Meter measures the apparent (actual) resistance. This can be repeated for probe 2 (3, 4, 5, …) after each 'round' of readings: this moves the LINE accross the ground until the end of the LINE is reached (up to a maximum of 99). After the first 'round' of readings probe number one (the first probe) can be moved to position 31 at the end of the line. For speed crocodile clips are supplied enabling cables to be speedily ‘walked’ along the probes in the LINE. RES2DINV圆4 is a computer program that will automatically determine a two-dimensional (2-D) resistivity model for the subsurface for the data obtained from electrical imaging surveys (Dahlin 1996 Loke et al. The probes/pins have a 4mm diameter hole in the end and can accept a 4mm banana plug. The Res2dinvx32圆4.pdf file has detailed instructions for using the software and should be used as the manual. RM Frobisher (1986) Ltd do not recommend using the TAR‑3 with other probe configurations. The TAR‑3's software incorporates sophisticated software algorithms to calculate the 'apparent' resitance of the earth between the probes set out in a Wenner array configuration. The TAR-3 Resistance Meter has been designed to measure the 'resistance', in Ohms (Ω), of the earth with probes in a 'Wenner Array'. (No dummy lines or odd shaped grids are needed.) Results can be merged using Microsoft Excel® or other spread-sheet software. The TAR-3 Resistance Meter Section kit and software is a great advance from using a meter with pen and paper. Lines can be up to 99 probes long (49m at two probes per metre). The position of each probe is displayed on the TAR-3 Resistance Meter during use giving real time, ‘On Screen’ information of the correct cable connections. The TAR-3 is designed to use a 'Walking and Expanding Wenner Array'.

Res2dinv manual file