XLT-30
Acoustical Leak Detector
Operating Manual
FISHER RESEARCH LABORATORY
CONTENTS
Introduction ........................................................................... pg. 1
Instrument Set....................................................................... pg. 2
Faceplate & Control Panel ................................................. pg. 4
Operating Instructions........................................................ pg. 6
Specifications......................................................................... pg. 8
INTRODUCTION
Fisher Research Laboratory has always been a leader in the field
of acoustical leak detection. From the early LT-10 through the
XLT-20, high quality sound amplification has been synonymous with
the name Fisher.
Fishers XLT-30 takes leak detection to a new level. Ultra sensitive
sound microphones, combined with a non-distortion amplification
system and crystal clear audio headphones make the XLT-30 the
leak detector destined to set new standards for the leak
professional.
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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. Depressing 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 combination 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 possible.
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