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Welcome to issue #23-
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
Validate low frequency performance
For ICP® sensors, the low frequency performance is dominated by the unit's discharge time constant.  A quick check of this specification via a flip or drop test gives a good indication of proper low frequency performance by the transducer, particularly important since many calibration response curves start at 10 Hz given cal cycle time and shaker stroke length.
Quick Links
Newsletter Archive
sensor & cal tips #19 - Linearity and the small world
sensor & cal tips #20 - Low frequency calibration; Cable considerations
ICP Triaxial Accelerometers Aid Vehicle Field Diagnostics; New Transverse Methods of Calibration
sensor & cal tips #22 - Proficieny Deficiency and TEDS
Archived sensor & cal tips - all the back issues

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... 
Click to read more about specification sheets(
Under Control?
Danger signAs a follow up to last month's article on Calibration Proficiency Deficiency , this month we continue to examine the most common deficiencies in ISO17025 compliance.  Cutting right to the chase, this month's deficiency is the 2nd most common -  Infractions in ISO17025 Section 5.5, Equipment.  The nature of calibration requires using the proper equipment with known performance, traceability and reliable operation.  While this is clearly core to the accurate operation of calibration, ironically, the compliance violations in this area are very common.
Read more about audit assessment challenges(
We appreciate your interest and are glad to be providing you information on a regular basis 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.
Mike Lally signature
Michael J. Lally
The Modal Shop
A PCB Group Company