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Equipment sensivity

Equipment sensivity

Equipment sensivity

(OP)
Hi all:
I want to ask if i can use an accelerometer with a different sensivity than original, and if yes, do i have to make any correction, how?
Thanks and luck

RE: Equipment sensivity

To use any output but volts the calibration or sensitivity must be known, and entered into the instrument setup(assuming mv/g) . To change the setup or configuration the instrument must be known.  Some instruments have built in help of varying degrees of usefulness.

RE: Equipment sensivity

If you have a chare coupled device it's in pC/g typically, and you dial it in on the charge amp.

More generally, yes, you can use different sensitivities, but if you use a different model of accelerometer then it may have  a different noise floor, max output, frequency response, and of course mass.

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

RE: Equipment sensivity

In addition to Greg's comments, it's typical (and sensible) to have your accelerometers calibrated every once in a while.  Even a set of nomonally identical accelerometers will show a small spread of sensitivities.  And they do drift over time too.

RE: Equipment sensivity

Much depends on what you're using the accelerometer for;
if you're simnply trying to identify resonances, for example,  actual amplitudes aren't particularly important, are they?

In which case,  accelerometer calibration isn't particularly important either.

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