General Information - INFICON Whisper Handbuch

General Information

Whisper is sensitive only to ultrasound (40 to 43 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. Drag your finger upward on the sensitivity touch pad to increase
sensitivity when experiencing little or no environmental noise. Drag your finger
downward on the sensitivity touch pad to reduce sensitivity in response to an
increase in environmental noise.
Many variables can affect the amount of ultrasound generated by the leakage of
gas through an orifice. Such factors include the pressure/vacuum relative to the
surrounding environment, how smooth the edges of the orifice are, the diameter of
the orifice, Whisper's distance from the orifice, and the presence of airflow, which
may dissipate the ultrasound.
As you use Whisper, keep in mind that these factors may affect your ability to
detect ultrasonic leaks.
Locating Leaks
NOTE: Bumping the accessory probe or nose piece into objects while seeking
leaks will cause false alarms. Leaks will be indicated by a beeping alarm
and flashing indicators. Disregard occasional short alarms.
W A R N I N G
Always keep clear of hot and/or moving engine and machinery
parts. Damage or injury could result.
1. Long press the power button to turn Whisper On/Off. The Battery indicator will
illuminate while Whisper is On.
NOTE: If the Battery indicator flashes, the batteries are low and should be
replaced.
2. Press the power button briefly to enable/disable the laser pointer feature (if
equipped). This feature allows for easier and more accurate location of a leak
site. See "Laser Pointer Feature"
3. Point 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 nose piece (or rubber extension probe) pointed in the general
direction of the suspected leak.
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