Heath Consultants Sure-Lock All Pro - Manual (Page 21)

18
Figure 2-2
(Transmitter positioned on its end directly over the interfering conductor. This position will energize
the target conductor and apply minimum signal to the interfering structure)
Another common mistake that must be understood and avoided in the indirect
mode of operation is AIR COUPLING. As was previously mentioned, the signal
is being radiated around the transmitter. When the transmitter and receiver are
receiver. This phenomenon can be avoided by maintaining an interval of at least
75 feet (23 m) between the receiver and transmitter at all times. If a trace is
required closer than 75 feet and the conductor cannot be energized by direct con-
nect means, the following step should be taken. Set the transmitter on its end, 1
to 2 feet to the side of the conductor (Figure 2-3). By using the transmitter in this
the transmitter in this position, the operator should maintain a minimum distance
of 35 feet (11 m). More discussion concerning elimination and determination of
air coupling will occur in the receiver portion of this manual.
Once the conductor has been energized by the proper placement of the transmit-
ter, the operator should walk the recommended distance away from the transmit-
ter with the receiver. The receiver should then be used to sweep the area while
watching the display and listening to the distinct tone changes as receiver senses
the conductor.