Signal Generator:
Using an Inductive Sweep
If a large area needs to be searched for buried services then an ‘Inductive Sweep’ could be used. It is an ideal method
for detecting the position of buried services as they cross the boundary of a large site.
An Inductive Sweep requires two people; one to operate the locator and one to position the Signal Generator.
1. Stand about 10 metres apart.
2. The first person holds the Signal Generator, switched on, close to the
ground and ‘end on’ whilst you hold the locator.
3. Adjust the Sensitivity so that the locator is just showing a visual
response and emitting an audible response.
4. In unison, slowly walk across the site, staying the same distance
apart and being careful to keep in line with each other. When the Signal
Generator gets close to a buried metallic service the signal will be
induced onto it and you should see this in the increased visual response
on the locator.
5. Immediately tell your colleague to stop and place the Signal Generator
on the ground at that point. Now you can pinpoint the service and trace out
its route. Continue the sweep across the length and width of search area.
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