2mV resolution ( input sensitivity ) ?

nurber3 · Post by **nurber3** » Wed Feb 24, 2016 3:55 pm

Hi Forum. I would like to measure vibration (<300Hz with amplitude of 2mV-120mV) using an accelerometer which outputs 1000mV/g. Specs say input sensitivity is 10mV with 10mV/division which I think is too coarse, but perhaps it is not ?

Sven

Nils Roos · Post by **Nils Roos** » Fri Feb 26, 2016 6:50 pm

Where did you find the 10mV figure ? Nominally, on LV setting the input resolution is 2V / 2^14 = 122µV .

nurber3 · Post by **nurber3** » Mon Feb 29, 2016 4:10 pm

Thanks Nils. Couldn't find the figure in my browser history, but I'm glad it's much finer. What can one hope to achieve for accuracy in the LV setting ? Found the following page on calibration, is it smart to run this on a new board ?

http://wiki.redpitaya.com/index.php?tit ... alibration

Sven

Nils Roos · Post by **Nils Roos** » Fri Mar 04, 2016 4:20 pm

What can one hope to achieve for accuracy in the LV setting ?

I suggest you measure that yourself. I have not evaluated that myself, and I suspect it varies with the operating environment (PSU, shielding, ...).

Found the following page on calibration, is it smart to run this on a new board ?

This calibration procedure is still valid.

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2mV resolution ( input sensitivity ) ?

2mV resolution ( input sensitivity ) ?

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