Hi Anshu,

Your set up is OK, both sensors should be mounted on the same shaker and
over the same vertical movement line.
You just have checked that the comparative commercial accelerometer have
his resonance frequency near the 1000 Hz. After this value his oscillation
amplitude is extremely small due to the parameters of the mounted elastic
system.
Please check also the overall mounting system, perhaps there is a wrong fixing
element.

Regards,
               Rarmas
------------------------------------------------------------------------
Date sent:              Wed, 3 Jul 2002 11:02 CDT
From:                   mems-talk-admin@memsnet.org
From:                   anshu mehta 
To:                     mems-talk@memsnet.org
Subject:                [mems-talk], accelerometer, calibration
Send reply to:          mems-talk@memsnet.org
        
        
Date sent:              Wed, 3 Jul 2002 07:26:22 -0700 (PDT)

> HI
>
> I am trying to calibrate a MEMS accelrometer
> fabricated in the lab using a reference accelerometer.
> Both are mounted on a pieozoelectric shaker and driven
> using a power amplifier and the output is taken at a
> HP dynamic signal analyzer.
>
> The problem I am facing is that the response for the
> commercial accelerometer falls beyond 1000 Hz or so,
> thus giving faulty results. I have tried with two
> different commercial accelerometers.
> Please help me figure out if the set-up I am using is
> wrong.
>
> Thanks,
> Anshu.
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