2
INSTRUMENT SET
1. Control Box
All listening and filtering controls for the XLT-30 are contained in this
sturdy housing. The function of each control is described in the section
entitled “Faceplate and Controls”.
2. Big Foot Probe
Also known as the Ground Microphone, this probe is to be used on hard
surfaces, concrete, asphalt, tile, etc. A flexible rubber shield helps prevent
outside sounds from interfering with the sounds from the buried pipe. De-
pressing the red button near the handle will Mute the audio from the probe
to suppress loud sounds when the probe is moved.
3. Hydrophonic Cylinder Probe
This probe is a direct contact probe designed to make direct connection to
the pipe, or any portion of the pipe that is accessible. Used in any combina-
tion of Sound Rods with the T-Handle, pipes can be accessed to distances
up to nearly 6 feet away.
Another feature of the Cylinder Probe is the ability to listen to pipe noise in
pipes that are buried in turf, or soft surfaces. Accurate pipe location is
essential for the placement of the Ground Rods as close to the pipe as pos-
sible.