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5.1 Task: Indirect electromagnetic mode of depth
measuring
Equipment used: receiver AP-027, electromagnetic
sensor EMD
Tip: When determining the depth, one should take into
account the terrain. In order to obtain precise results, select
flat surface areas.
Method: 1. Find the precise pipeline route location
(preferably using the minimum method). Mark the spot.
2. Fix the sensor antenna at a 45 angle to the ground surface,
minimum of the signal is observed at a distance from the point
«above the route», equal to the depth of the utilities, when the
antenna axis intersects the axis of the route. This is the indirect
method of measuring the depth of utility (fig. 5.1)
5.2 Task: Detecting the pipeline and utility lines intersection point.
Equipment used: receiver AP-027, electromagnetic
sensor EMD, headphones.
Method: 1. Perform preliminary pipeline route location.
2. Turn on the receiver and set it up for broadband.
3. Рosition the electromagnetic antenna over the
pipeline, parallel to the pipeline route (signal level
displayed on the receiver screen will be close to zero)
(fig. 5.2). Perform route location in accordance with
the maximum method. When following the route, the
intersection points with utility lines can be identified by
the maximum signal.
5. Additional features
8
Fig.5.1
Fig.5.2
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