Product Manual

2
Introduction
In general, pipe and cable locators can operate in a variety of modes and frequencies.
The following is a brief description of the basic operating modes supported by the Rex
Pipe and Cable locator. In addition, Rex offers advanced features to suit almost any type
of locating challenge, while emphasizing portability, size, and convenience. The receiver
collapses for portability and expands for full functionality, and the transmitter packs up
to 5 watts output power, multiple frequencies, and an inductive antenna in a flat and
lightweight package.
Schonstedt has incorporated more than sixty years of experience in producing products
for aerospace, military and infrastructure applications in the design of our locators. All
Schonstedt products are manufactured following high standards of reliability, durability and
performance.
For additional information on pipe and cable locating theory and techniques, check the
training section of our website at
www.schonstedt.com/training
.
Passive 50/60 Hz
In passive mode, the transmitter is not used at all. Instead, the receiver
searches for an appropriate harmonic of 60 or 50 Hz signals (factory preset).
These signals are typically present in energized power cables, making it
possible to locate them without using a transmitter to impose a tracing signal
onto them.
Conductive
In conductive mode, the transmitter imposes a signal of the selected
frequency onto the pipe or cable to be traced. It does so by making direct
contact with the pipe or cable at a point where the pipe/cable comes up to the
surface of the ground (a transformer box, a water hydrant, a telephone switch
box, a gas meter, etc.). The circuit is closed by providing a return path with a
stake that is buried in the ground near the transmitter.
Inductive Clamp
In inductive clamp mode, the transmitter imposes a signal of the selected
frequency onto the pipe or cable to be traced. It does so by energizing a
clamp that is placed so that it is completely encircling the pipe or cable at a
point where the pipe/cable comes up to the surface of the ground (a
transformer box, telephone switch box, gas meter, etc.). The clamp then induces
a current onto the pipe or cable. In this mode, it is not necessary to provide a
return path for the induced current to the transmitter. The induced current will
travel on the pipe or cable for a certain distance, making it possible to trace it.