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What is the computation formula for |XYZ| Modulus in Freescale Vibration Monitoring?

Question asked by Roberto Sammler on Apr 15, 2015
Latest reply on Apr 17, 2015 by Roberto Sammler

I'm trying to use a FRDM-KL26Z as data reference for my own sensor (based on a FXOS8700 as well). I do need the vector magnitude of the acceleration. To get the data I use the Freescale Vibration Monitoring software. In that software there is a |XYZ| Modulus which according to the help file is giving the "magnitude of the combined channels". Why does the software still show negative values? Does anyone know based on which formula the values are computed?