The Tigre Resistivity imaging system is an ongoing Resistivity development from Allied Associates. The Tigre offers flexibility, with increased power now a standard feature, and 32, 64 or 128 electrodes options supplied within a single instrument case.
The Allied Tigre is a high quality earth resistance meter capable of accurate measurements covering a wide range of applications. Traditionally, high power was thought to be necessary for successful surveys. However, it is now accepted that the superior precision of the Allied Tigre enables accurate electrical measurements to be made in all but the most extreme environments, nominally down to depths of 700 meters. A choice of current settings from 0.5mA to 200mA, with automatic gain steps, enables measurements to be made between 400 Kohm and 0.001ohm. Three square wave frequencies are available with a choice of up to 16 cycles per measurement. Self potential can be monitored while various checks on instrument performance are incorporated into control software.

The Allied Tigre can be used for soundings and profiling in the traditional way using single-core cables; however, with the selection of suitable automation options, complex electrical images, such as shown below, can be collected by a single operator and viewed in the field, real time, by way of our ImagerPro 2006 acquisition software. ImagerPro 2006 is a Windows data collection program producing real-time pseudosections of apparent Resistivity values offering the operator a fast visual QC facility. ImagerPro 2006 allows the operator a quick method for setting survey parameters prior to data collection.

Software...
The Tigre is supplied with ImagerPro 2006, our Windows acquisition software package. A 32-bit product, ImagerPro is designed to run under Windows 95, 98, 2000 or later. Its user friendly interface requires little previous computer experience and the program can easily be used in conjunction with other processing software such as RES2DINV and RES3DINV, also available from Allied. We also offers a range of bespoke cable assemblies, to meet operational requirements with fixed or variable spacing, offset sounding cables, borehole and marine cables. Details available on request