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The model D.A.D.
Directional Acoustic Detector features a new concept in fault
locating that utilizes the speed of sound to show direction to the
fault (thump) from where the operator is standing.
This dual channel system is
designed to work with any brand thumper. The sound of the thump is
detected at different times by two microphones placed over the cable
route. The D.A.D. uses an ultra-high speed clock to determine which
microphone is closer to the fault and indicates the direction the
operator must go. When the operator passes the fault, the meter will
indicate a reversal in direction.
The D.A.D. includes soft
soil microphones (earth probes) as well as tri-pod bases for hard
surface location. The earth probe allows the thump to be heard in
soft dirt, sand, bark dust, or under water. It even works well in
high background noise areas.
Since the earth probe
penetrates the soil, background noise is left above ground and all
that remains below ground is the 'thump'. The tri-pod bases are used
over asphalt and concrete and can even be pushed into some types of
soft soil.
The D.A.D. also includes a
ballistic impulse detector to visually confirm the presence of the
'thump'. This detector receives the large magnetic wave that travels
the cable with the thumper pulse. This magnetic is so effective, the
operator can pre-locate most faults using only the magnetic portion
of the D.A.D., even from inside a moving vehicle. |
