The Dynatel 500DL Precision Cable/Fault Locator is a portable instrument which locates the path of buried cables. Four frequencies are available to accomodate varying factors such as distance, cable type, or soil conditions. A separate tone function in the transmitter provides a powerful 577.5 Hz signal for identification using a separate toning amplifier. The instrument is also able to detect 50 Hz AC power signals. In the depth measurement mode, the Dynatel 500DL provides a direct digital readout of the estimated depth of buried cables, and a bar graph indication of the relative current in the cable.