TMS Square sensor & calibration tips
 
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Welcome to issue #19-
 
If you are new to our newsletter, please enjoy this short communication, share it with a colleague and have a look at the archive links below where you'll find all the back issues with their wealth of information.  We're glad to have you on board!  
Accelerometer Temp Extremes
Tip of the Month
Cable tips for small sensors
 
On extremely small ICP accelerometers consider using ultra fine 36 AWG wire for the signal cable to eliminate measurement error from cable forces.  If available, consider the solder terminal connector option for the sensor to allow easy field repair when there is a failure of such fine gauge cable.
Quick Links
 
Newsletter Archive
  
Interpreting calibration results; Discharge time constant
 
New developments in accel cal; Introduction to industrial accels
 
sensor & cal tips #17 -
Improving your accel calibration reference measurement at low frequencies; ICP® options
 
sensor & cal tips #18 - Why calibrate; Accelerometer selection considerations
 
Archived sensor & cal tips - all the back issues
Why is my 1G or 10G calibration good at 100+ G?
(article written by Bob Sill and Mike Lally)
 
Linearity plotAnother common question I hear, "Is my accelerometer calibration valid for an acceleration level other than what I calibrated at?"  The common reason for the question is that automated accelerometer calibration systems traditionally calibrate the various frequency choices at constant acceleration levels like 1G or 10G, yet users can be using the sensors in ranges of hundreds, thousands or tens of thousands of G's. The answer for most accelerometers is a definite yes, although it is useful to examine the definition of its full scale range...
 
Click to read more about calibration linearity
(http://www.modalshop.com/test_calibration.asp?ID=245)
Measurement considerations on small structures
 
CD Drive
Most dynamics people think of structural testing as the system vibration study of large structures like automobiles, aircraft or civil structures.  However, the ever increasing push for smaller, lighter, and more powerful in the mobile electronics world (phones, disk drives, subnotebooks, etc) creates a unique set of challenges for structural test engineers. First and foremost is often simply finding space to locate a response accelerometer!  This article discusses a number of other specialized measurement considerations for ultra-small or ultra-light test structures...
 
(http://www.modalshop.com/test_calibration.asp?ID=246)
We appreciate your interest and are glad to be providing you regular information to help with your dynamic testing and calibration needs.  If you have any questions you would like answered or have a topic you would like to see covered, please contact us and we'll be glad to help out.
 
Sincerely,
Mike Lally signature
Michael J. Lally
The Modal Shop
A PCB Group Company