6
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. Begin by attaching the
rubber extension probe over the nose piece. When the extension is attached, the
sensing angle of the system is reduced, increasing the directional capability and
reducing the effects of the adjacent noise sources. This allows the Whisper's detection
capabilities to become more directional. If you suspect your reading to originate from a
source other than what you are scanning, point the probe toward the suspected other
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.
