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the icon in the upper right corner of the LCD starts to move, the transmitter will work
normally.
The transmitter is placed above the known point of the cable and the sensing test line
is aligned with the cable at this point.
3. Signal search and tracking (receiver)
It's consistent with the direct connection.
4.1.4 Extension of inductive method detection - blind measurement
1. Blind test principle
Blind measurement is a test method for the detection of unknown metal pipeline and
various cables using the sensing mode of the instrument. It is to use the transmitter
built-in antenna in a certain direction to underground launch (also) into the air high
frequency or radio frequency electromagnetic signal, when electromagnetic signals
encountered underground metal pipelines, the signal will be metal pipeline
transmission, in the form of current transmission line on the secondary magnetic field
and radiation out at the same time, the receiver can be in the top of the line to receive
the secondary magnetic field signal, not only locate the pipeline position of a point,
connect the test to the pipeline location point is the pipeline location to both, this is
the principle of blind test.
Using inductive ignorance of the instrument is a kind of effective method to the
detection of pipeline, but also by the scene environment, the laying of pipeline
material, the influence of the factor such as the embedding depth and restriction,
therefore, must be combined with the scene of surveying and mapping to an area