Bacharach Tru Pointe 2100, Руководство по эксплуатации и обслуживанию

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Tru Pointe® 2100 Instruction 0028-9003
10
2. Reducing the sensitivity will suppress the effect background noise has on the
display, and also in the headset. This will help make the leak sound more identi
fi -
able.
Sometimes the most interfering background sounds come from areas of high turbulence within
a pipe. This can be where high velocity
fl ow changes direction, or is restricted such as within a
partially closed valve. These situations will produce a high frequency hiss which is very similar to
the sound of the leak. Use the methods above for reducing the background noise.
Frequency Selection (Airborne)
Another method of reducing background noise is by adjusting the frequency band. The dominant
background sounds which interfere with the leak detection may be avoided by switching to
another frequency. The proper setting will depend on the environment. In general, we have
found “AirH” to be most effective for leak detection.
Recording Overall System Noise
Use the Tru Pointe
®
2100 to record sound levels of compressor noise, fan vibration, fan belts,
motors, and even noisy ducts. The overall ultrasonic sound level of a system can be recorded
and compared to previous and current readings. The Tru Pointe
®
2100 will only record the ultra-
sonic range of a noisy system. This part of the sound will increase in proportion to the sonic part
and is an indication of the problem.
Taking a Baseline Reading
When taking a reading of overall noise level, begin by reducing the sensitivity until the bar graph
reads less than 1/2. This will give you room on the display for future readings.
IMPORTANT: The digital circuitry of the Tru Pointe
®
2100 allows for great accuracy and consistency, but
the operator must note the settings to ensure success.
Record the sensitivity, volume, sensor type and the
numeric level reading on the display, as well as the
position from which the reading was taken. This will be
your baseline for future tests.
Touch Probe Applications
Ultrasound not only travels through air but solid materials as well. The touch probe sensor is
used to detect abnormal system sounds which are
internally generated. Such sounds include
abnormal fl ow in piping, valves, and steam traps. Other applications include the detection of
friction or increased wear in bearings, motors and gears.
Frequency Selection (Touch Probe)
Changing the frequency bands of the touch probe sensor allows the user to hear different sounds
within a system. For example in a steam trap, the Probe High setting makes it easy to isolate the
sound of a steam traps purge cycle, while the Probe Low setting allows you to hear the trickle