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  • Cheap device, but a little unprecise in the low end

    posted by walker12 on 01/13/2013
    0 0

    Involvement:Expert (understands the inner workings) - Ownership:1 day to 1 week

    Pros:

    Cheap and easy to use meter. Connect and read!
    Nearly constant current consumption over voltage, only depending on the number of LED display elements active.

    Cons:

    Precision a bit poor in low and mid-range. Shows 0.1 to 0.2 V too low up to about 15V. Relative error below 1.5% in the 12V battery range, however. (11-15V)

    OtherThoughts:

    The received device seems better suited for a 24V system that my 12V.
    Plots of absolute error and current consumption have been uploaded.

    Bottomline:

    OK device, if you can live with the low and mid-range measurement error.

    • Absolute measurement error
    • Current consumption

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