Heterodyne Feature - Inficon Whisper Manual De Operación

4. If you are using Whisper without headphones, it will beep when an ultrasonic
disturbance is detected. If you are using headphones, Whisper will make a
variety of different noises due to its heterodyne feature. (See
Feature" for more information.) To isolate the ultrasonic disturbance, gradually
decrease sensitivity by slowly dragging your finger down the touch pad until the
beeping stops. The sensitivity level will be indicated briefly by the number of
illuminated indicators next to the touch pad.
5. Move closer to the suspected leak, continuing the sweeping pattern and
narrowing the range of the sweep by making smaller patterns until beeping
resumes. This will lead to the location of the disturbance. To narrow the scan
area, attach the flexible rubber extension to the probe and repeat step 3.
6. Repair all leaks as located and repeat scan.

Heterodyne Feature

Whisper features heterodyne capability, which converts the ultrasonic frequencies
to sounds that can be heard by the human ear. This allows you to easily isolate
the ultrasonic source.
Plug the included headphones into the jack on the right side of Whisper to enable
heterodyne capability. Dragging your finger upward/downward on the sensitivity
touch pad will increase/decrease the volume of the headphones.
NOTE: Sensitivity defaults to a lower level when headphones are plugged in to
protect against hearing damage. Use the touch pad to increase sensitivity
if needed.
Laser Pointer Feature
Whisper (if equipped) features an integrated laser pointer. This feature is
designed to aid in pinpointing leak sites. To enable/disable the laser pointer
feature, briefly press the power button. The laser pointer will automatically disable
if Whisper is turned Off.
NOTE: Laser pointer not available in Japan.
W A R N I N G
Do not aim the laser pointer at any person or animal.
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"Heterodyne