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Line Tracing
Where risers are present, say a
vent line running up the side of a building, the
utility locator transmitter can be connected to
the object, and a current with a sharp frequency,
normally 82 kHz, is impressed on the conductor
pipe. The receiver unit is tuned to the same
frequency, and is traversed progressively to map
the run of the conductor in it's underground leg,
away from the riser.
Where live conduit is involved, an induction
ring can be placed around the exposed riser and
the signal with specific frequency is induced onto
the electrical leads. In a similar manner
the underground leg is traced out with the
receiver unit.
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