TMS Square sensor & calibration tips                                          Your one-stop sound & vibration shop

Welcome to issue #42 - January/February
Wow! What a busy start to the New Year! Are you feeling the economy continue to ramp up too?  Your customer requests keep pouring in to PCB Group and The Modal Shop, and I have to confess, January was so busy we had to take a break from the newsletter... I hope your business is growing too and that you are also "suffering from the good problems of growth!"  You'll note in this issue we are beginning to use more video content and are making it easier for you to get the information you need to solve your dynamic measurement challenges.  Check out the video homepage on our website to quickly access the latest in product and application descriptions, as well as candid presentations from The Modal Shop team on the how's and why's of new products and technology.  Let us know what you think and we'll be glad to add more content that meets your needs...
Join Our Mailing List

Find us on Facebook


 Follow us on Twitter

View our profile on LinkedIn
Tip of the Month

Surface Preparation


To ensure accurate transduction in high frequency measurements, it is important to take care when preparing the accelerometer mounting surface.  Specifications for the best high frequency mounts include: Surface flatness of 0.0003 inch TIR, Surface Roughness of 32 micro inch, Perpendicularity of mounting hole of 1 degree +/- 0.5 degree and a Tap Class of 2.  A very thin coating of silicone lubricant also fills voids enhancing mounting interface stiffness and transmissibility for the best high frequency response.

Quick Links
ISO TC 108 - Mechanical vibration, shock and condition monitoring
ISO TC 108/SC 3 - Use and calibration of vibration and shock measuring instruments

Previous Newsletter

sensor & cal tips #41 -
Sensing Calibration News; Can I create my own DVM?
Select Newsletter Articles by Topic
PCB Group Companies

Q&A on Calibration and Resonance Search

Resonant Frequency PlotQuestion: I see that the frequency response of the reference standard accelerometer is calibrated up to a 20kHz upper limit frequency.  So how does the resonance search function (up to 50 kHz) for the calibration system "calibrate" the sensitivity at frequencies higher than 20kHz?...

Click here to read more

State-of-the-Union of Sensor TEDS

TEDS Overview InterviewMr. Marco Peres, Structural Test Product Manager, answers some of the common questions about TEDS, templates and versions, as well as giving a glimpse of where things are headed.  This article provides the Question and Answer transcription of a recent interview with him and can also be viewed as a video if you prefer.

Blast from the Past...

For those who may be new to our newsletter, we wanted to highlight an article from a previous sensor & calibration tips - Decoding the specification sheet...

Triax Accel specsRemember the famous line from Romeo & Juliet, "What's in a name? That which we call a rose by any other name would smell as sweet..."  How about when it comes to accelerometers... is it the same?  Is a rose still a rose still a rose?  Well... as you might imagine... there is a great deal of variance.  A survey on specification sheets for a similar accelerometer from 5 different sensor manufacturers indicates a disparity of what vendors consider as "standard" specifications.  5 out of 5 Manufacturers listed...
"The only constant in the world is change..." - Heraclitus (of Ephesus) (c. 535-BC - 475 CB)

So we better embrace it! Here at The Modal Shop we are working hard to meet your needs and delivering those products, services and interactions with our signature smile of "Total Customer Satisfaction."  We've been working hard on some exciting new technologies.  Look for a number of new Modal Shop sensing, excitation and calibration products over the next few months...and while we are filling your needs that we can see, please remember, we always invite you to contact us with those we don't.  We've created a dynamic hub of the top talent in business, research and academia to help with your toughest measurement challenges.  We are here to serve you!

Mike Lally signature
20 Year StickerMichael J. Lally
The Modal Shop
A PCB Group Company