Heath Consultants Sure-Lock All Pro User Manual

Page 20

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17

One of the pitfalls the operator must recognize is that when the transmitter is
functioning in the inductive mode, other conductors in the area may also be
energized. When the transmitter is functioning in this application, it is energizing
the conductor with an electromagnetic signal. This signal is not only going onto
the intended conductor but it is also being radiated onto the other conductors
surrounding the transmitter.

These other conductors might include overhead power or telephone lines, chain
link fences, guard rails, railroad tracks, or other utilities in the area of the trans-
mitter. If the operator suspects there will be interference from other conductors,
a direct mode of connection should be used to energize the conductor and to help
eliminate these interfering conductors.

If signals from another conductor are causing interference during the trace, they
will affect the accuracy of the locater. The operator should attempt to connect
the transmitter directly to the conductor by means of a direct connect assembly
(discussed later) or by means of the coupler clamp. If this is not possible, the
transmitter should be positioned as shown as in Figure 2-2. With the transmitter
positioned as shown, the target conductor can be energized with minimum signal
placed on the interfering conductor.

Figure 2-1

(Transmitter properly aligned with the conductor)

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