This system consists of sonic sonde, magnetic locator sub, gamma ray tool, depth system, surface preprocessing unit, data acquisition interface, PC486 and thermal plotter.
The functions of the measurement system include scanning of microelectrode, acquiring and smoothing of experimental data and displaying of three kinds of potential distribution maps on the plotter.
扫描测量和数据采集速度快，信号测量精度高，各种电位分布图形清晰直观；
3
The data transfer of USB used in this paper conquers some disadvantages, such as low speed, complex of connecting and so on, providing a new pattern interface for the data transfer of plotter .