O P E R A T I N G

Whisper ®
Ultrasonic Leak Detector

M A N U A L

Declaration Of Conformity
This is to certify that this equipment, designed and manufactured byINFICON® Inc., Two Technology Place, East Syracuse, NY 13057 USA, meetsthe essential safety requirements of the European Union and is placed on themarket accordingly. It has been constructed in accordance with goodengineering practice in safety matters in force in the Community and does notendanger the safety of persons, domestic animals or property when properly
installed and maintained and used in applications for which it was made.
Equipment Description. . . . . . . . Whisper® Ultrasonic Leak Detector
Applicable Directives . . . . . . . . . 73/23/EEC as amended by 93/68/EEC
89/336/EEC as amended by 93/68/EEC
Applicable Standards . . . . . . . . . EN61010-1: 1993 EN55011, Group 1,
Class A: 1991 EN50082-1: 1992
CE Implementation Date . . . . . . January 15, 2001
Authorized Representative. . . . . Duane WrightManager, Quality Assurance
INFICON, Inc.
Any questions relative to this declaration or to the safety of INFICON’sproducts should be directed, in writing, to the quality assurance department at
the above address.

WARNING
This symbol is used to alert the user to the presence ofimportant operating and maintenance (servicing) instructionsin the literature accompanying this instrument.
INFICON® and Whisper® are trademarks of INFICON Inc.

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Introduction
The Whisper® will detect and locate sources of ultrasonic disturbance throughthe use of sophisticated circuitry.
An ultrasonic disturbance is created when objects collide. Vacuum leaks
create collisions between molecules flowing through an orifice. Pressure leaks
create collisions between molecules exiting an orifice. All gases and liquids
create disturbances if forced into, or out of, an orifice. All solid materials create
disturbances when any friction exists.
The Whisper is therefore capable of detecting and locating sources ofultrasonic disturbances created by gases, liquids or solids.

General Information
The Whisper is a very sensitive instrument used to detect and locate thesource of vacuum and/or pressure leaks of liquids and/or gases. The Whisper
is sensitive only to ultrasound (40.5 kHz) and is unaffected by audible noise.
INTERNAL NOISE CONTROL (I.N.C.) allows the use of this instrument in
extremely noisy environments such as mechanical rooms, around operational
chillers, etc. Rotate the “Sensitivity” knob clockwise to increase sensitivity
when experiencing little or no environmental noise. Rotate the “Sensitivity”
knob counterclockwise to reduce sensitivity in response to an increase inenvironmental noise. The I.N.C. works much like a two way radio squelch
allowing only the strongest and closest signals to penetrate the electronic wall
built by the I.N.C. circuitry.
Many variables can affect the amount of ultrasound generated by the leakageof gas through an orifice. Such factors include the pressure/vacuum and thesurrounding environment, how smooth the edges of the orifice are, thediameter of the orifice, the leak detector’s distance from the orifice and thepresence of airflow, which may dissipate the ultrasound.
As you use the Whisper, keep in mind that these factors may affect your ability
to detect ultrasonic leaks.

3ApplicationsA/C Refrigerant Leaks (Any and all types of refrigerant)
Locating Worn Bearings
Leaks in Pneumatic Control Systems
Leaks in Natural Gas, LPG Leaks
Leaks in Compressed Air Systems
Leaks in Vacuum Systems
Line Set Leaks In Foundation/Walls
Diagnosing Solenoid Operations
Steam Traps
Electrical Arcing

Specifications
Sensitivity . . . . . . . . . . . . . . . Detects a leak through a 0.004" diameter orifice
at 5.0 psig from a 12" distance.
Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indoor or Outdoor
Operating temperature range. . . . . . . . . . . +32 °F to +122 °F (0 °C to +50 °C)(may be operated for a limited timein lower temperature environments)
Storage temperature range . . . . . . . . . . +14 °F to +140 °F (-10 °C to +60 °C)
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85% RH NC Max.
Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6500’ (2000 m)
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . One 9 Volt alkaline battery
Battery Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Approximately 50 hours
Pollution Degree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Overvoltage category. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Weight (with battery) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 oz. (0.25 kg)

4Locating Leaks
NOTE:

Bumping the probe into objects while seeking leaks will cause false
alarms. Leaks will be indicated by an increase in the tick rate.
Disregard occasional short alarms.

WARNING
Always keep clear of hot and/or moving engine and machineryparts. Damage or injury could result.
1. Slide the power switch to the on position and rotate the “Sensitivity” control
knob to the maximum clockwise position.
2. Point the Whisper in the direction of the suspected leak and scan the area
by making a slow “X” (a vertical and horizontal type sweeping motion) while
keeping the probe pointed in the general direction of the suspected leak.
3. If the tick rate increases, there is an ultrasonic disturbance. Begin turning
the “Sensitivity” knob very slowly in a counter-clockwise direction until theticking returns to normal.
4. Move closer to the suspected leak, continuing the sweeping pattern andnarrowing the range of the sweep by making smaller patterns until theticking once again increases. This will lead to the location of thedisturbance. If an exact location is desired, attach the flexible rubber
extension to the probe and repeat step 3.
5. Repair all leaks as located and repeat scan.

High Noise Environments
In noisy environments, it may be necessary to “tune out” unwanted signals
from other areas in close proximity to where you are scanning for leaks. Beginby attaching the rubber extension over the probe. When the extension isattached, the sensing angle of the system is reduced, thereby increasing thedirectional capability and reducing the effects of the adjacent noise sources.
This allows the probe to become more directional. If you suspect your reading
to be originating from a source other than what you are scanning, point probe
toward suspected other source (may be a compressor, v belt, discharging
steam line, etc.) and slowly turn “sensitivity” knob counterclockwise until thealarm stops. Turn probe back toward direction of suspected leak and continue
to scan. This step may have to be repeated as you move around to otherlocations in search of leaks. If probe is close to internal moving parts ofequipment, and the alarm sounds, push rubber probe against housing ofequipment. If the alarm still sounds, internal friction of moving parts and not aleak source, may be causing the alarm.

5Transmitter Accessory
The Whisper Transmitter is an optional accessory which can be used with theWhisper Ultrasonic Leak Detector to locate leaks in walk-in coolers/freezers,wall and ceiling joints, around doors, windows, body seals, rubber moldings,ducts, etc. The Transmitter produces the frequency detected by the Whisper.
By placing the Transmitter in a sealed area and scanning the exterior of thisarea, any signal escaping from the sealed area will be indicated by theWhisper. A flaw in the seal can quickly and accurately be pinpointed.
1. Turn the transmitter power switch on. The LED will illuminate to indicate it isoperating.
2. Place the Transmitter into the area to be tested. Seal area to be tested
completely.
3. Set the “Sensitivity” control of the Whisper to maximum.
4. Scan the exterior area for the suspect leaks.
5. To pinpoint leaks, see Locating Leaks, on page 5.

Care and MaintenanceTo clean exterior surfaces, wipe with a soft damp cloth.
To change the battery, depress the release tab using a coin or a screwdriverand slide the cover back. Replace the battery with a 9 volt alkaline battery.
Replace the cover by holding it in place along the side rails while sliding it
forward to engage both the rear hooks and the front release tab.

6Warranty
INFICON warrants your Whisper Ultrasonic Leak Detector to be free fromdefects of materials or workmanship for two years from the date of purchase.
INFICON does not warrant items that deteriorate under normal use, such as
power cells. In addition, INFICON does not warrant any instrument that has
been subjected to misuse, negligence, or accident, or has been repaired oraltered by anyone other than INFICON.
INFICON’s liability is limited to instruments returned to INFICON,
transportation prepaid, not later than thirty (30) days after the warranty period
expires, and which INFICON judges to have malfunctioned because of
defective materials or workmanship. INFICON’s liability is limited to, at its
option, repairing or replacing the defective instrument or part.
This warranty is in lieu of all other warranties, express or implied, whether ofmerchantability or of fitness for a particular purpose or otherwise. All suchother warranties are expressly disclaimed. INFICON shall have no liability inexcess of the price paid to INFICON for the instrument plus returntransportation charges prepaid. INFICON shall have no liability for any
incidental or consequential damages. All such liabilities are excluded.

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TWO TECHNOLOGY PLACE
EAST SYRACUSE, NY 13057-9714 USA
Phone: +1.800.344.3304
Fax: +1.315.437-3803
Email: reachus@inficon.com
www.inficon.com
074-345-P1C