accordingly.
In actual location, since people are far from capacitor discharge equipment, they
can hardly hear sound receiving from air when ball-gap discharges. You may feel
irritable, or even suspect that the discharge instrument does not work before you hear
seismic waves emanating from discharging by the fault point. Sometimes you need to
know whether the sound they heard is synchronous with discharge cycle of discharge
instrument when there’s interference background of pulse sound source; otherwise
you can not make a final judgment. In such a case you need to do synchronized
location.
When using impulse discharge method, except for the sound of a discharge at the
point of fault, it will also generate a high-frequency electromagnetic radiation to the
ground. This is an electromagnetic wave which can be received by magnetic antenna
on the ground. It can be converted into a voltage signal to be amplified, and then
shown as a display element. This creates the conditions for synchronous reception
method of location instrument.
When locate by synchronous receive method, if you hear the seismic waves, at
the mean time they also showed an discharged electromagnetic wave by point of fault,
and that means the discharge instrument is working. As long as seismic signals and
electromagnetic signals can be synchronized together, then the seismic waves you
heard are credible and point of fault is in the vicinity.
HZ-B cable fault location instrument uses synchronous receive method to locate.
Display unit uses a 3.8 inches 320
╳
240 dot matrix high-resolution LCD screen
design, which has abundant information display and intuitive operation. Comparing
with the old location instrument pointer, it has been greatly improved. It shows path
signal waveform and fixed voice waveform simultaneously on the LCD screen, and
displays the time difference between the two of them. The closer from the point of
fault, the smaller the difference is, thus providing the user with a more intuitive
