☞
The signal strength indicators do not indicate the size, depth or type
of a utility.
☞
To ascertain an estimated depth of the utility, use a signal transmitter
or a sonde. Refer to "6 Estimating Depth and Current of a Utility".
5.2
How to Trace a Utility
1.
Pinpoint a utility by finding the peak reading.
The peak reading is found when the locator
is positioned directly over a utility and at 90°
to it.
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2.
Rotate the Locator around its axis until the
signal strength indicators are at a minimum.
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3.
When the signal strength indicators are at a
minimum, the blade of the locator is in line
with the utility and indicates its direction.
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4.
Trace the route of the utility by repeating the
following process:
•
Pinpoint the utility.
•
Determine the direction of the utility.
•
Follow the direction of the utility.
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4
4
5.3
How to Conduct a Sweep Search
Before the sweep search, define the work area to be excavated and inspect
this area for signs of buried utilities, such as:
•
Recent trenching
•
Buried utility marker posts
•
Overhead lines that run down poles and underground
•
Access chamber covers
Tracing process
Sweep Search Process
Applications
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