36
2
、
Depth Measurement
This multi frequency locator can measure the depth of the target pipeline. Most commonly
used methods are direct reading, 80% and 45 degrees methods.
(1)
Direct reading method
: to measure the depth of the range: 4.5cm-6m. When the
range is exceeded or the signal is not normal, the receiver display shows an error
message.Before depth detecting, the target pipeline should be accurately located by the
receiver peak mode and the valley mode. If the two positions are inconsistent, there is
interference exists. Depth should be measured when the peak mode and the valley mode
are Consistent.
Place the receiver just above the pipeline and make the receiver body at the right angle
with the pipeline and perpendicular to the ground. At this time it is better not to select the
vertical antenna mode. Press the
key and the receiver will automatically adjust the
gain. After the gain adjustment is completed, the display shows: Testing. After 5 seconds,
the depth of the target line and the current in the tube will be displayed and then press the
key to automatically restore the previous working status.
In depth measurement, a good quality signal is needed to be applied to the target line,
when the key
is pressed, the receiver will automatically adjust the sensitivity to the
best. If the receiver receives the too weak signals, the display shows the signal is too
weak. Press the button
to restore the previous working status.
Although the method of direct reading is simple, it needs some conditions to read the
correct results, otherwise the measurement is not so accurate and even the wrong result
is obtained. One of the conditions for correct direct reading is that the positioning of the
pipeline should be accurate, that is, the target pipeline position to be measured by the
peak method and the valley method should be basically the same. Generally, it should be
less than 20 cm, otherwise there is big deviation.
Depth measurement refers to the distance from the receiver bottom to the center of the
target pipeline rather than the distance to the top of the pipeline, which cannot be ignored
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...
