I am developing a product to sense slowly rotating spray arms on a Water Treatment site so that we can detect if they stop rotating.
I have a number of the Evaluation boards for the ADSRX612 which I am currently testing.
This seems like the best part for the job within reasonable price constraints !!
I am open to suggestions......
The initial offset error between SUMJ and RATEOUT seems quite high at about 160mV but that can be trimmed out.
I also measured a temperature drift of 65mV ( RATEOUT ) from 20 deg C to -20 deg C.
Does this seem reasonable ?
I hope to use the TEMP output to compensate for this.
As we are operating at speeds of only around 8 deg/s these offsets are a major limiting factor.
At the moment it looks to me like I will have to individually calibrate each sensor by measuring TEMP , SUMJ and RATEOUT over a range of points over the system operating temperature range of -20 to +40 deg C.
This will obviously be quite costly and time consuming and I was wondering if you have come across a simpler solution ?
Many thanks for any help or advice.
Regards , John Barr.