I bought 175 g pack of salami which had 162 g of salami as well.

  • afraid_of_zombies@lemmy.world
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    9 months ago

    That is only single point calibration. You want more than that in case the transfer function is non-linear. Ideally at least two for the extremes of range.

    Basically imagine if y does not equal x, say y = x -0.01*x + b. Your tare is going to adjust b such that at x = 0 you get y equals 0. That doesn’t fix x is equal to 900. At 900 you would get 891.

    Generally speaking for weight you have differential or integral non-linearity. You fix both by multiple calibration points. Which leads to the range transition problem but whatever. No excuse anymore with FPGAs.