Multiple Control Accelerometer Data – what it is REALLY showing you.

November 15, 2011 | Leave a Comment

Sometimes no matter how well your vibration fixture is designed, you absolutely MUST use two or more control accelerometers to get all the way through your test spectrum. Now I’m NOT talking about using multiple control accelerometers to make a bad fixture work, there’s no excuse for that, I’m talking about a large, complex fixture [...]

Jun

2

Throw Away Your Torque Wrench

June 2, 2011 | Leave a Comment

That’s right, the one you use to verify the torque on your fixture bolts. The one you send out periodically to get calibrated. Think of how much money you will save on calibration! You see the thing is that that torque wrench is probably not doing you any good. When we are securing a fixture [...]

Sep

28

Half Sine Shock Pulse Testing – WHY?

September 28, 2010 | 3 Comments

There’s an old saying “If the only tool you have is a hammer, then all of your problems start to look like nails.” In the old days of shock testing (writer spits into spittoon) all we had was drop table test machines. 1/2 sine shock pulses were easy to perform (just use rubber under the [...]

May

20

Difference Between G and Grms

May 20, 2009 | 1 Comment

Hi, I was referring to some of papers available on internet for HALT test guidelines. For Vibration tests, the paper says that chamber requirements should be -> Vibration output without load from 1 Grms to a minimum of 35 Grms. But for test equipment, accelerometer range is +/- 500g. I am confused what is the [...]

Feb

10

Welcome to the Vibration & Shock Testing Blog

February 10, 2009 | 5 Comments

Hi – we look forward to questions about vibration and shock testing – everything is fair game: Test equipment Test specs Test parameters (selection OR measurement) Fixture design Data analysis Or just let us know that you have an interest. Steve Brenner, Consultant and V&S Blogmeister