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Inside this Issue: |
June
2007 |
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Interpreting captured sound wave files
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Equipment Tip - Shielding
- Archived
i-presentations for FREE download
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- Level 1
Training - Minneapolis, MN
- One-Day
Leak Surveyor - Denver, CO
- 2007
Level 1 Training Schedule
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Interpreting your recorded sound wave files so we can all
HEAR MORE! |
Allan Rienstra, Editor
The Ultrawave Technology Report
Send us an email explaining how you capture ultrasound wave
files |
Each week we
receive requests from ultrasound inspectors just like you to
interpret sound wave files recorded from their SDT170. It
always proves an interesting challenge to first listen, and
then look at wave forms and spectra to help a customer
decide what was really detected/recorded.
One of the
considerations we have to make here is the conditions under
which signals were captured. For example, we recently
received a 15 second sound clip of what sounded like arcing
on a transformer. Through some email exchanges we were
eventually able to make some sense of the file. Some
additional information from the inspector helped us look at
the file. We needed to determine the distance he was from
the transformer for clip 1 and clip 2. In comparing the
intensity of the clips we needed to know if there was
distance attenuation to account for any differences. We also
needed to know if the clip was taken during a side to side
sweeping scan, or if the sensor was held stationary during
the capture. Ultrasound signals are very directional at
40kHz so the latter is always better. A swept signal could
lead to misinterpretation since the intensity would change
as the sensor's focal point moved away and then back to the
source.
There are
lots of other tips to consider when capturing and recording
sound wave files from your SDT170 (or other ultrasound
instrument). I'd love to HEAR MORE ideas you have discovered
during your own inspections. If you have a good tip or idea
to share about recording and capturing sound wave files
please
write me an email. I will select some of them to share
in the next issue of The Ultrawave Technology Report. |
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Equipment
Tip - Shielding |
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Shielding your inspection area from competing
ultrasound noise is a crucial skill to master when
searching for very low pressure leaks or vacuum
leaks. These leaks produce very little ultrasonic
turbulence (hissing sound quality) making it
necessary to use high amplification levels (A=80dB).
We're not talking about a gross leak inspection in
this instance. Probably the kind of leak you are
searching for is one crucial to a process. For
instance, one customer last week complained of
vacuum loss on a reactor in his titanium mill. If
his reactor cannot hold enough vacuum he cannot
maintain temperatures necessary to ensure product
quality. Using his SDT170 and a shielding towel he
was able to locate enough vacuum leaks while the
shielding towel protected his inspection area from
other ultrasound noises. He was able to get the
reactor up and running after only 45 minutes of leak
inspection. On the next schedule outage he will
conduct further testing to find the remaining leaks. |
Protect
your inspection area from competing ultrasounds
using a rag or other cloth as a shield |
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Level 1
Training - Minneapolis, MN - July 24-26th |
|
Join our fast
growing list of Level 1 Certified Ultrasound Inspectors and
receive 1.8 Continuing Education Units from ASNT. Those who
complete our training write back to tell us about the many
wins made with their new borne ultrasound program
Our next
class is filling fast. Don't miss the only class to be
offered in Minnesota in 2007.
 |
Holiday
Inn - Minneapolis Metrodome
1500 Washington Ave South
Minneapolis, MN 55454
Phone: 612-334-1310
Fax: 612-333-7910
SDT
Corporate Room Rates: 109.00 Single
Offers
Complimentary Airport Shuttle Service
|
Do you have what it takes to
become a Bionic Tradesman? |
|
1 Day Leak
Surveyor Training - Denver, CO July 17, 2007 |
|
Implementing
an ultrasound compressed air leak survey program
that is both effective and enduring is a challenge
faced by nearly every company that has tried.
Standing between success and failure are several
roadblocks including time constraint, manpower
shortages, conflicting priorities, and the need to
prove the impact the program will have first;
often before funds are approved to start the
project...
learn more
Our training aids are
the best in the world. Endless research went into
developing equipment that most closely simulates
your plant floor environment. Any more realistic and
you'd have to be in the factory. Several
companies have purchased our training aids for their
own "train the trainer" programs.
Register for Denver today - Class closes soon |
 |
|
2007 Level
1 Training Schedule |
Leak
Detection Techniques |
-
Minneapolis, MN - July 24-26
-
Portland, OR - August 7-9
-
Nashville, TN - August 28-30
-
Queretaro, MX - September 10-12
- Singapore - September
18-20
-
Pittsburgh, PA - September 25-27
- San
Jose, CA - October 23-25
- Kansas
City, MO - November 6-7
- Atlanta,
GA - December 4-5
Click here for full details
|
The key to
learning is hands-on practical experience. Here students get
real world training detecting leaks on a pneumatic bed at
SMC Pneumatics Chilean headquarters. These are life
experiences that make the difference for your compressed air
surveyor program |
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We take
your privacy seriously |
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The Ultrawave
Technology Report is published regularly by SDT North
America and is intended to provide information to anyone
with an interest in this technology about current and future
events. If you have questions about this email or the
format in which its received please contact Allan Rienstra.
If you do not wish to receive these updates you can request
removal from the list at anytime by sending an email to
allan@sdtnorthamerica.com.
You can also
reach us by telephone at (905) 377-1313 (International) or
1-800-667-5325 (USA & Canada)
SDT North America, PO Box 682, Cobourg, ON - K9A 4R5 |
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