[time-nuts] Question for the cesium nuts.

[Daun Yeagley]

That reminds me of a tester I got to see while I was working on a project for
Motorola at one of their ALT (accelerated life test) labs.  This was for testing
durability of cell phones.
The tester basically was a pendulum that was about three feet high. At the base,
you placed the PUT (phone under test), and you pulled the pendulum up to a
specified angle and let it go.  It would swing down and whack the phone across
the room into a target.  Amazing what they'll handle!
Another similar test was dropping a steel ball (maybe 3/4" diameter) onto the
display of the phone. The idea was to see how high you could go before it
shattered.
One of my more "amusing" projects.

Daun 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf
Of Thomas A. Frank
Sent: Saturday, March 17, 2007 9:41 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Question for the cesium nuts.

>> The test is called the "hammer blow" test.
>
> Why do I picture a large steel hammer on a swing setup with a DUT as 
> targeted
> endpoint?


Because that's pretty much how it's done :-)

OK, the DUT is sitting on a big steel table and the hammer hits the 
table not the piece, but still...you would be amazed at how far the 
pieces fly sometimes.

Tom Frank, KA2CDK


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