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1. If you don't have a metal tube/flexible conduit, you can use
a non-conductive tube with a metal wire of at least 1.5mm in
diameter in the tube to carry the signal from the transmitter.
2. When using the receiver, the stronger the signal received,
the closer the transmitter is to the conductive tube/wire.
3. During detection, when the signal suddenly attenuates, this
position is where the blockage is at.
4. Adjust the transmitter power to get an adequate signal
depending on the detection environment. You can also
put the receiver into manual mode and adjust its sensitivity
to pick up the signal from the transmitter adequately.
3.1.7 Tracking in laid metal pipelines
Preconditions:
The pipeline needs to be metallic (such as galvanized
steel)
The pipeline should not be grounded and there should
be a relatively high resistance
between the pipeline and the soil/wall, otherwise the
detection distance will be fairly short.
Make sure to properly ground the negative end of the
transmitter.
Connect the positive end of the transmitter to the
pipeline using a connecting line.
Turn off all power
to connected equipment
to avoid injury or
damage to the meter.
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The detection of laid tap water pipe and heating pipe
is shown in Fig.3-1-7a and Fig.3-1-7b respectively:
1. The ground of the transmitter needs to be far enough away
from the pipeline in order for the signal to be clearly
received by the receiver.
2. Adjust the transmitter power to get an adequate signal
depending on the detection environment.
3. When using the receiver, the stronger the signal received,
the closer the transmitter is to the conductive tube/wire.
4. You can put the receiver into manual mode and adjust its
sensitivity to pick up the signal from the transmitter
adequately.
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