DESCRIPTION
The TW-7700 Digital Line Tracer consists of a transmitter, receiver, ground-plate/ground-rod assembly, carrying case (hard or soft), and an operators manual. The TW-7700 is a single frequency line tracer.
The TW-7700 is an active locating line tracer. There are three methods of active locating that an operator can use to trace a utility. The conductive method is the most preferred method, since a strong transmitter signal is transmitted through the intended target. The inductive method is the easiest method to use, but may not yield the best results. When a direct connec- tion is not available, but the operator has good knowl- edge of where one point of the utility may be, the op- erator can place the Transmitter over the utility mak- ing sure that the arrow on top of the transmitter is parallel to the path of the utility. The third method of active locating involves using the coupling clamp ac- cessory. The coupling clamp is used when the utility is exposed, but a direct connection is not available. The clamp jaws are opened and placed around the utility. The clamp never makes a direct connection with the utility, that is, the utility can move freely with the clamp around it.
The features of the TW-7700 make it a very easy and practical instrument in today’s world of underground locating.