INFICON Whisper Ultrasonic Leak Detector - Manual (Page 6)

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source (maybe a compressor, v belt, discharging steam line, etc.) and slowly decrease
sensitivity until the alarm stops. Turn the probe back toward the direction of the
suspected leak and continue to scan. This step may have to be repeated as you move
around to other locations in search of leaks. If the probe is close to internal moving parts
of equipment, and the alarm sounds, push the rubber probe against the equipment
housing. If the alarm still sounds, internal friction of moving parts and not a leak source,
may be causing the alarm.
Using the Contact Probe (if equipped)
If one is included with your Whisper, the metal contact probe offers additional capabilities
when used with your ultrasonic detector. The contact probe can be a useful accessory
in diagnosing machinery. For best results, always use the headphones when using the
contact probe so as to enable the heterodyne feature.
To use, twist the contact probe's threaded end into the Whisper detector's plastic nose
piece. Power the Whisper on. Then, touch the end of the contact probe to bearing
housings, solenoids, pistons and other mechanical equipment to allow the frequencies
to travel into the Whisper's ultrasonic transducer. Adjust sensitivity as needed.
Properly functioning machinery sounds smooth and clear, while poorly functioning
machinery may make irregular or grinding types of noises. Over time you will learn to
recognize when machinery sounds to be in good working order or when it sounds worn
and in need of maintenance.
WARNING
Do not place the contact probe in running machinery, fan cages, drive
belts, or other moving parts. Always use extreme caution when using
the contact probe around machinery.
Ultrasonic Transmitter Accessory (if equipped)
The Whisper Ultrasonic Transmitter is an accessory which can be used with the Whisper
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 this area, any signal escaping from the sealed area will
be indicated by the Whisper. 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 is operating.
You will not be able to hear the tone generated by the transmitter.
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 4 .