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Airborne Applications
Airborne Applications
The Airborne sensor is used to detect sound waves which
The Airborne sensor is used to detect sound waves which
the air.
the air.
The most common airborne application is compressed air or refrigerant leak
The most common airborne application is compressed air or refrigerant leak detec
Leaks
Leaks
When searching for leaks with the Tru Pointe
When searching for leaks with the Tru Pointe
turbulent
turbulent
fl
fl
ow of the gas as it
ow of the gas as it
fl
fl
ows from the leak ori
ows from the leak ori
15 for a more detailed
15 for a more detailed explanat
explanation).
ion).
fi
fi
fty feet away, but it is best to hold
fty feet away, but it is best to hold
1.
1.
Stand s
Stand
several feet
everal feet
Tru Pointe® 2100 until only 1 or 2 LED's are lit.
Tru Pointe® 2100 until only 1 or 2 LED's are lit.
2.
2.
Scan
Scan
around
around
fi
fi
ttings,
ttings,
NOTE:
NOTE:
If the LED Bar Graph
If the LED Bar Graph
reduce the sensitivity and continue scanning.
reduce the sensitivity and continue scanning.
3.
3.
The sound
The sound
in the
in the
gets closer to a leak.
gets closer to a leak.
In the case of large
In the case of large
refrigerant leaks remove the nose cone and
refrigerant leaks remove the nose cone and
sensitivity
sensitivity.
.
Then sweep the instrument over the entire area.
Then sweep the instrument over the entire area.
Reducing Background Noise Interference
Reducing Background Noise Interference
The Tru Pointe
The Tru Pointe
®
®
2100 detects a narrow band of
2100 detects a narrow band of
appear to be an
appear to be an
overwhelming background noise, the sound may not be within
overwhelming background noise, the sound may not be within
®
®
range of the Tru Pointe
range of the Tru Pointe
2100.
2100.
Leaks sound like a "hiss"
Leaks sound like a "hiss"
or rushing sound, while compressors "chatter" a rhythmical mechanical
or rushing sound, while compressors "chatter" a rhythmical mechanical
pattern.
pattern.
Fans should not produce any wind noise detectable by the Tru Pointe
Fans should not produce any wind noise detectable by the Tru Pointe
the fan motor may produce a
the fan motor may produce a
"buzz" or "hum".
"buzz" or "hum".
EXAMPLE:
EXAMPLE:
from leak sounds.
from leak sounds.
short quick breath
short quick breath throu
sounds through the Tru Pointe
sounds through the Tru Pointe
of how its direct translation process helps to
of how its direct translation process helps to
the difference between the two signals.
the difference between the two signals.
Practice listening to different components of the test area, this will help
Practice listening to different components of the test area, this will help
other normal operational sounds.
other normal operational sounds.
The following methods can help reduce
The following methods can help reduce
Pointe
Pointe
®
®
2100:
2100:
1.
1.
Placing
Placing
the
the
fl
fl
exible waveguide onto the airborne sensor will
exible waveguide onto the airborne sensor will
the Tru Pointe
the Tru Pointe
®
®
2100 more directional.
2100 more directional.
ing sounds entering from othe
ing sounds entering from
wave guide will also help to reduce the background noise.
wave guide will also help to reduce the background noise.
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travel to the Tru Pointe
travel to the Tru Pointe
®
®
2100, remember that you are listening for
2100, remember that you are listening for
fi
fi
ce (refer to "Principles of Operation" on
ce (refer to "Principles of Operation" on
The Tru Pointe
The Tru Pointe
®
®
2100
2100
is capable of
is capable of hear
the instrument as close to the test
the instrument as close to the test
from the
from the
suspected
suspected
leak area
leak area
and reduce
and reduce
fl
fl
anges and all other
anges and all other
suspected leak sources.
suspected leak sources.
Display is at maximum,
Display is at maximum,
headset and
headset and
the LED
the LED
Bar Graph
Bar Graph
the waveguide and increase the
the waveguide and increase the
ultrasonic sound, therefore although there may
ultrasonic sound, therefore although there may
Mechanical vibrations sound very different
Mechanical vibrations sound very different
Shake a set of keys, and th
Shake a set of keys, and
then take a
through the nose.
gh the nose.
Listening to both
Listening to both
®
®
2100 is a good example
2100 is a good example
distinguish
distinguish
the amount of background noise detected by the Tru
the amount of background noise detected by the Tru
This helps shield the sensor from c
This helps shield the sensor from
other directions.
r directions.
Cupping a hand around the end of the
Cupping a hand around the end of the
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®
®
2100 through
2100 through
detection.
tion.
the
the
page
page
hearing leaks from o
ing leaks from
over
ver
area as safely possible.
area as safely possible.
the sensit
the
sensitivity of
ivity of
the
the
Display will
Display will
increase
increase a
as the
s the
unit
unit
the detection
the detection
®
®
2100, although
2100, although
en take a
to identify problems from
to identify problems from
make the reception of
make the reception of
compet-
ompet-
9
9
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