6
1 Precise point operation procedure
When you are close to the point of failure, please follow the sequence of procedures
below
：
Steps
Action
1
Place the HZ-B's ground-penetrating microphone in the starting
position.
2
If HZ-B cannot pick up any sound signal at this measuring point.
Please follow the path of the cable under test. When you find that HZ-B
receives the first useful impact discharge sound signal, the left side of
the LCD of HZ-B host will automatically display the sound level of the
measurement point.
If you are unable to pick up the shock discharge sound signal
through a ground-penetrating microphone or headphones in a long area,
you should try to make a precise point from the starting point in the
opposite direction.
3
Please continue to follow the path of the cable under test and move
one step at a time. If necessary, adjust the position of the central axis of
the cable under test at any time. At each measurement point, please
stay a few impulse discharge pulse signals.
When you are near the cable fault point, you will hear a stronger
knocking sound, and the sound level of the current measurement point
displayed by HZ-B will suddenly increase.
4
Please rotate the HZ-B ground-penetrating microphone 180 ° and
use a smaller step to approach the fault point again.
5
Please continue to reduce the step distance, look for the place
where the fault is the loudest, and determine the location of the fault
point as accurately as possible. Then make an accurate mark on the
ground.
