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    SMI230 Zero-g offset temperature drift Upper limit standard

    SMI230 Zero-g offset temperature drift Upper limit standard

    ZhangLeo
    New Poster

    Our company is conducting the Zero-g offset temperature verification for the SMI230. I noticed in the documentation that the Zero-g offset temperature drift for the accelerometer is ±0.2 mg/K (Figure 1), and for the gyroscope, it is ±0.015 °/s/K (Figure 2).

    My question is: I am testing the Zero-g offset temperature drift in a temperature chamber from -20°C to 85°C (with a zero calibration performed at 25°C beforehand)Figure 3. What are the upper and lower limits for determining a Fail in terms of the offset? How is it calculated? What is the reference standard?

    Should I calculate the limits as (20 + 85 = 105), 105 * 0.0002g = 0.021g as the standard for the upper and lower limits?
    Or should I use Zero-g offset (including temperature and lifetime effects) = 20 mg as the standard for the limits?
    Thank you!

    ZhangLeo_0-1729105022823.png

    ZhangLeo_1-1729105037771.png

    ZhangLeo_2-1729106130517.png

     

     

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