DESCRIPTION
1
3
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 transmit-
ter 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
connection is not available, but the operator has good
knowledge of where one point of the utility may be,
the operator can place the Transmitter over the utility
making 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
accessory. 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.
