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ADIS16209 systematic drift on long timescales?

Question asked by iceman on Aug 22, 2013
Latest reply on Sep 12, 2013 by NevadaMark

We were probably among some of the first users of the ADIS16209 inclinometer chip.  We have about fifty of them installed inside environmental chambers which are embedded in a glacier, and have been monitoring them for two years now.  We see a systematic drift in the X and Y tilts.  I can't eliminate the possibility that this drift is real (since I no longer have direct access to the devices) but it seems unlikely.  We see 1) a tendency for both X and Y to always decrease in real value over time (positive values become less positive and negative values become more negative; timescale is several months) and 2) This decrease is considerably more pronounced in the Y channel.

 

Has anyone else seen this behavior?

 

Thanks in advance for your help.

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