Product Manual

3
Inductive
In the inductive mode, the transmitter imposes a signal of the selected
frequency onto the pipe or cable to be traced. It does so by energizing an
inductive antenna built into the case. The transmitter is placed on the ground
in a direction perpendicular to the pipe or cable being traced. The inductive
antenna 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.
Sonde
In sonde mode, the transmitter is not used at all. This mode is used to trace non-
metallic pipes, or metallic pipes where other modes are inapplicable or
inefficient. A small beacon transmitter, or sonde, is pushed through the pipe, and
the receiver searches for the signal emitted by the sonde.
Since the signal being traced by the receiver is produced by the sonde and not
travelling along the pipes, there are some differences in the way the receiver is
used. Due to the nature and strength of the sonde signal, it is necessary to
have some idea of where the sonde is (in order to narrow the search area to a
radius of several feet centered on the sonde).
For additional information on sonde locating and techniques, check the training
section of our website at
www.schonstedt.com/training
.
Mini Sonde-512 Hz Large Sonde-512 Hz