Ultrasonic Leak and Corona Detector
Ultrasonic Leak and Corona Detector
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Features compact long-distance
directional pickup
Locates gas leaks and corona within
inches of the source
Lightweight for easy use, even in remote
field locations
Insensitive to high ambient audible noise
levels
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DESCRIPTION
The Ultrasonic Leak and Corona Detector is a low-cost,
portable system that receives air-borne ultrasonic signals,
converts them to the audible range, amplifies them and
displays the output visibly on a meter and audibly through
a speaker or headset. The system is designed for locating
gas leaks and electrical corona sources, all of which emit
strong ultrasonic signals that are inaudible to the unaided
human ear. Variously shaped collectors facilitate quick
location of ultrasonic sources; in particular, the new
directional pickup horn allows pinpointing of
discharges in high-voltage equipment while the operator
remains at a safe distance.
The ultrasonic detection system shown above consists of
the instrument with indicator and speaker, plug-in
ultrasonic transducer probe, directional pickup horn
attachment, sound concentrator attachment and a headset.
A carrying case is included.
Using the Detector
With the transducer probe plugged into the instrument, the
operator can immediately locate many ultrasonic sources
by scanning with the transducer probe held as a flashlight
and using the speaker or meter to detect maximum
emissions. For greater sensitivity, or to further pinpoint a
distant source, the operator simply slips the directional
horn over the transducer. The focus is now greatly
concentrated, permitting source location to within a
1-ft (0.3-m) circle at 30 ft (9 m). If the source can be
approached, the rubber sound concentrator is slipped over
the transducer probe, pinpointing a source to within its tip
diameter of about 0.5 in. (13 mm).
Pickup Horn Operation
The pickup horn
amplifies signals
originating within
the response beam
RESPONSE
and rejects others.
BEAM
TRANSDUCER
PICKUP HORN
The ultrasonic transducer in the probe responds primarily
to a 35- to 45-kHz bandwidth—a range found most useful
for the tests described here. The transducer is very
insensitive to audible sounds, allowing use of the
detection system in areas with high audible background
noise levels.
The output meter, for indicating ultrasonic sound intensity,
is calibrated with a 0-to-10 linear scale, showing relative
level. Power is from a 9-volt transistor battery, and a single
on-off volume-control switch is provided.
APPLICATIONS
The Ultrasonic Leak and Corona Detector is useful
wherever electrical or pressurized equipment is used.
Applications include preventive maintenance in plants and
utilities to locate poor or arcing connections, switches,
faulty insulators, lightning arresters, power supplies,
motors and radio frequency interference sources. In the
test laboratory, the set is useful in performing high-pot
tests on components of all sizes and for high-voltage
equipment tests. Early detection of leaks by preventive
maintenance checks in compressed air systems, boilers and
air-conditioning equipment will provide savings in reduced
equipment replacement and downtime.
Ultrasonic Leak and Corona Detector
Features and Benefits
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Locates leaks and corona within inches of the source
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Simple and foolproof to operate
Lightweight for easy use, even in remote field locations
Unique directional horn extends distance ranges to
detect ultrasonics in various locations; operator uses
pistol grip and peep sight to aim at the source.
Insensitive to high ambient audible noise levels
Solid-state circuitry designed for high reliability, long life
and low maintenance
Battery-powered; uses one 9-volt transistor battery
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Locating a leak in an air pressure
tank
The detector is excellent for
patrolling pole lines.
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For Leak Detection
Where gas or air leaks produce a turbulence that creates
sonic energy, the ultrasonic detector can detect a 0.002-in.
(0.05-mm) diameter leak at 5 ft (1.5 m) with only 10-psi
pressure. The instrument can also be used to detect leaks
in vacuum systems, and to detect leakage of poisonous,
noxious, explosive or expensive gases in gas pressure
systems.
For Corona Detection
The ultrasonic detector is most useful for locating corona
sources that are exposed directly to the surrounding air,
such as on terminations, high-voltage bus systems,
bushings and transformers. The detector is excellent for
patrolling pole lines and checking all kinds of electrical
equipment for leaky insulators and faulty connections. It is
invaluable in research and development work for locating
points of excessive stress on small electrical components
and assemblies, as well as on very large equipment. The
detector is ideal for finding and cleaning up corona
discharge points on the high-voltage test floor. When used
for locating corona discharge, all suitable safety
precautions must be taken to avoid electric shock.
Specifications
Construction:
Rugged anodized aluminum chassis protected by
a leather case
Circuitry:
Solid-state heterodyne receiver with single on-off
switch and volume control
Frequency Response:
Frequencies between 35 and 45 kHz are
amplified and converted into audible sounds, while sounds within
the frequency range of the human ear are not detected.
Meter:
Ultrasonic intensity is indicated on a 0-to-10 linear scale
showing relative level.
Battery
9-volt Eveready No. 216 (NEDA 1604) in quick-access
compartment
Battery life is approximately 75 hours.
Dimensions (including case)
12 H x 17 W x 5 D in.
(305 H x 432 W x 127 D mm)
Weight
5.5 lb (2.5 kg)
Weight figure includes detector, transducer probe, directional
horn, sound concentrator, headset, battery and case.
Ultrasonic Leak and Corona Detector
Pressure (psi)
OPTIONAL ACCESSORIES
Ultrasonic Tone Generator
For testing nonpressurized items such as tanks and pipes
for faulty welds, seams, seals and gaskets, the tone
generator is placed inside the item to be tested, filling the
area with ultrasound (35 to 45 kHz). Sound will leak
through any openings. The detector is then used to scan
the outside of the test object, pinpointing the leak location.
The tone generator is powered by a standard 9-volt
transistor battery.
Contact Probe
This probe is used to detect ultrasonic signals in
environments other than air. The contact probe is
extremely useful for detecting faulty steam traps, worn
bearings, worn gears, etc.
100
80
60
40
30
40 F
T
20
20 F
10 F
T
T
5 FT
10
8.0
6.0
4.0
3.0
Leak Sensitivity
2.0
(Approach to orifice
at least 20 times
orifice diameter)
(Assumes use under
ideal circumstances)
1.0
0.001
0.002
0.003 0.004
0.006 0.008 0.010
Leak Diameter (in.)
Ultrasonic Leak and Corona Detector
ORDERING INFORMATION
Item (Qty)
Ultrasonic Leak and Corona Detector
Included Accessories
Transducer probe, hand-held, insulated,
moderately directional, with a 5.5-ft [1.7-m]
retractable cable
Directional horn that slips over probe,
highly directional, with peep sight and
pistol-grip handle
Sound concentrator
Headset, 8-ohm, lightweight, cushioned
Case, foam-protected
Optional Accessories
Ultrasonic tone generator
Contact probe
569001-7
569001-8
Cat. No.
569001
569001-2
569001-6
569001-4
569001-3
569001-5
UK
Archcliffe Road Dover
CT17 9EN England
T +44 (0) 1304 502101
F +44 (0) 1304 207342
UNITED STATES
4271 Bronze Way
Dallas TX75237-1088 USA
T 800 723 2861 (USA only)
T +1 214 330 3203
F +1 214 337 3038
OTHER TECHNICAL SALES OFFICES
Valley Forge USA, Toronto CANADA,
Mumbai INDIA, Trappes FRANCE,
Sydney AUSTRALIA, Madrid SPAIN
and the Kingdom of BAHRAIN.
Registered to ISO 9001:2000 Reg no. Q 09290
Registered to ISO 14001 Reg no. EMS 61597
ULTRA_LEAKDECT_DS_en_V10
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