48
The cable is usually buried directly under the road outside the metal fence on
the road, and the signal will be coupled to the metal fence. Because the metal
fence is close to the antenna at the bottom of the receiver, tracking becomes
difficult. Lift the receiver so that the antenna in the lower middle of the body is in
the same level with the metal fence. This problem can be solved.
The fact that the transmitter signal is connected to the metal pillar of the
street light is almost as effective as the metal shield of the lighting cable itself,
because the metal shield of the lighting cable can generally be connected to the
metal pillar.
For cables coming from wooden poles, concrete poles or lighting columns,
the transmitter can be placed in an inductive mode and the signal is applied by
lining the pole at right angles to the ground.
6.Some Problems in the Detection of Cast Iron Pipes
This underground pipeline detector can be used to search for steel pipes and
cast iron pipes with isolated interfaces.
Some cast iron gas pipelines and tap water pipelines have insulated
joints. Transmitter signals can be applied to the gas meter or water meter. By using
jumpers, the insulating gaskets are bypassed (a connecting magnet can be used on
both sides of the insulating gasket to ensure the connection of magnets. Make
sure the pipes are well connected and the two connecting magnets are connected
by wires) so as to guarantee a reliable circuit for the cast iron pipes entering the
house
.
Illustration of Power Cable of Street Lights Detection
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...
