Heath Consultants Aqua-Scop - Manual (Page 22)

IV. AQUA-SCOPE USER’S GUIDE:
A. Application
The pinpointing of unknown water leakage can be accomplished
by the use of a combination of components, which make up the
kit. By using different microphones and by amplification with
a solid-state receiver, the sounds of water leaking from the line
can be localized and pinpointed. The type or pitch of the sound
varies from the deep roaring of a main up to a very high whining
of leaking valve packing. It is necessary to differentiate these
sounds from the other normal background noises.
Auxiliary Means - Plunger Bar: Useful when searching for leaks
on soil or sod covered pipes. Surfaces of this nature are poor
sound transmitters and require the use of a bar as an auxiliary
sounding.
Resonant Plate: The Resonant Plate is a specially machined
plate, which improves the sounding qualities. The Plate is
designed to accept the Ground Microphone.
B. Leakage Detection with the Direct Contact Microphone
Preliminary Detection with the Direct Contact Microphone:
The Direct Contact Microphone is used for preliminary detection
in direct contact with an accessible part of the main, hydrant,
curb valves, or directly on the service in the house, etc. The
intensity of this direct contact is always in direct relationship
to the distance of the leak from the point of measurement and
indicates where the leak might be. By acoustic comparison of
the noise heard in the Headset and by visual observation of
the noise strength with the aid of the optional meter readout
module at one or more points of measurement, the leak can be
approximately located.
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CHAPTER THREE