40
Figure g:
Tee and elbow at the current measurement diagram
Principle of Current measurement: the transmitter applies a current signal to
the target pipeline. As the distance from the transmitter increases, the current
intensity will gradually reduce and the degree of attenuation depends on the
pipeline type and soil. However, for one type of the pipeline, the current attenuation
will be steady without a sudden drop or change. Sudden changes in current indicate
that the pipeline or its condition has changed. (See figure h)
Figure h: Illustration of Principle of Current Measurement
Current measurement method: current measurement method is exactly sameas the
depth measurement and the current value will be displayed together with the depth
measurement.
If the signal of the adjacent pipeline is received, this will reduce the measurement
Содержание HZ-5000
Страница 1: ...HZ 5000 Underground Cable Detector User Manual Huazheng Electric Manufacturing Baoding Co Ltd...
Страница 35: ...33 Figure a Illustration of Deeper Pipes Figure b Illustration of T Branch Pipe...
Страница 36: ...34 Figure c Illustration of the Pipe that Changes Directions Figure D Illustration of Detection of Pipe Ends...
Страница 37: ...35 Figure e Illustration of Detection under Steel Mesh Net Illustration of Depth Measurement...
