27
Illustration of Placing Transmitter
Place the transmitter on the "positive" side of the target line,and in the same
pipeline directionto get better sensing signals.
Illustration of Placing Transmitter
1
）
Transmitter Frequency Selection
High-frequency signals are most susceptible to other pipelines. Please use
high-frequency in the inductive connection. The high frequency signal will sense all
the pipelines, so the inductive connection is the best way to find underground
pipelines instead of tracking the pipeline. To track the pipeline it is ideal to use the
direct connection.
General principles of frequency selection:
For high resistance pipelines (e.g. communication cables, pipes with coating and cast
iron pipes), use the frequency of 83KHz. It must also be noted that the higher the
frequency, the more easily it is sensible to other pipelines and the shorter
transmittingdistance;
For the general pipeline and cable detection, use 65KHz frequency which has longer
transmitting distance and it is not easy to apply signals to other pipelines. It is
suitable for long-distance pipeline tracking.
2
）
Transmitter power Selection
The transmitter power selection should be kept at the minimum level that meets the
operational requirements, and increase the output power to the extent that a clear
anomaly signalon the pipelinecould be detected. If the output power is too high, it
will apply the signals to nearby pipelines and this makes it more difficult to identify
Summary of Contents for HZ-5000
Page 1: ...HZ 5000 Underground Cable Detector User Manual Huazheng Electric Manufacturing Baoding Co Ltd...
Page 35: ...33 Figure a Illustration of Deeper Pipes Figure b Illustration of T Branch Pipe...
Page 37: ...35 Figure e Illustration of Detection under Steel Mesh Net Illustration of Depth Measurement...
