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weight card

i have the load cell of 100kg
i have a ADC NAU7802.
i have to calculate weight through this ADC.
can anyone have idea how to convert ADC value to weight.

Parents
  • gain =128
    excitation=4.5 v
    24 bit adc so 2^24 -1=16777215;

    //convert adc value into volt
    volt=(((float)present_adcdata*excitation)/((float)16777215*gain));
    volt=present_adcdata*.000002095; // i get in mili volt 128 gain

    load cell capacity is 100kg
    load cell sensitivity=2mv/v
    excitation=4.5 v

    100kg -> 9mv

    1:100,00 = x *9 mv

    x= 9/100,000

    x=0.00009
    1 gram want 0.00009 mv

    not convert adc volt into gram

    gram=volt/0.00009;

    is my calculation is right or wrong

Reply
  • gain =128
    excitation=4.5 v
    24 bit adc so 2^24 -1=16777215;

    //convert adc value into volt
    volt=(((float)present_adcdata*excitation)/((float)16777215*gain));
    volt=present_adcdata*.000002095; // i get in mili volt 128 gain

    load cell capacity is 100kg
    load cell sensitivity=2mv/v
    excitation=4.5 v

    100kg -> 9mv

    1:100,00 = x *9 mv

    x= 9/100,000

    x=0.00009
    1 gram want 0.00009 mv

    not convert adc volt into gram

    gram=volt/0.00009;

    is my calculation is right or wrong

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