Goldak 777-A Quick Manual

Model 777-A Leak Detector
Pin-Point Underground
Leaks with Industry's
Most Accurate and
Proven Leak Detector.
Plumbers, contractors, water works personnel, and
plant maintenance people have continually sought
specialized equipment and improved techniques for
detecting and pinpointing underground water leaks.
The Model 777-A leak detector meets this require-
ment in a simple and efficient manner, utilizing the
proven theory that leaks in water systems under
pressure create mechanical vibrations that travel
along the pipe and at right angles to it (to the sur-
face). The operator simply touches the microphone
probe to the pipe being tested and to all exposed fit-
tings, such as hydrants, shut-offs, valve stems, water
meters, faucets, etc. The microphone converts
these mechanical vibrations to electrical impulses
that are then amplified and displayed on the meter
as the "sounds" of the leak can be heard in the
headphones. The water leak is then localized by
comparing readings and sounds from a series of
detection points on the water system. Pinpointing is
accomplished by reading through the
pavement or floor using the ultra sensitive micro-
phone.
RATED #1 FOR
RESIDENTIAL AND COMMERCIAL
SLAB LEAKS
I N N O V A T I N G U N D E R G R O U N D

OUTSTANDING FEATURES

Aluminum instrument housing contains circuitry,
controls and meter. Weight: 2.5 lbs
Dimensions: 3" x 6" x 10", Batteries: 6 "AA"
Ultra sensitive microphone to detect a wide
range of water leak sounds and convert them
into electrical impulses which are then amplified
and displayed
Large sensitive meter to display leak "sounds"
and indicate battery condition
Padded stereo headphones to reproduce leak
sounds and effectively shut out external noises.
Wide-range controls to adjust amplifier gain,
meter sensitivity and filter frequency (filter range:
20 Hz - 500 Hz on "Lo", 20 Hz - 3.5 KHz on "Hi")
Hi-impact foam lined plastic carrying case
(20" x 16" x 8")

PIN-POINT LEAK DETECTION

L O C A T I N G
PIN-POINT LOCATING