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6.1 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. 6.1)
6.2 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. 6.2). 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.
6. Additional features
15
Fig.6.1
Fig.6.2
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