The basic components of any acquisition system are: transmitter or current source; receiver which measures the resulting electrode potentials; multiplexer for connecting quickly and automatically the electrodes to the transmitter and receiver; and a computer for system control and data archival.
The instrument used for this method is a fast multi-channel resistivity meter 10-channel system Syscal-Pro produced by IRIS Instruments. It allows the acquisition of several thousand data points in few hours. Under typical conditions, for the Syscal-Pro operating at 4 Hz and stacking 4-5 times, it is possible to acquire data within about 1% error in the magnitude (as determined by comparing reciprocal measurements), at a rate of about 6-7000 measurements per hour.