Absolute Accuracy of a Load Cell measurement.

[KPRDaytonOH]

I see how to calculate absolute accuracy for the SCXI-1520 and SCXI-1600 combination.  To call out the accuracy of a load cell measurement, do I have to add the load cell specification numbers for non-linearity, non-repeatability, and hysteresis to the absolute accuracy calculations?

[David L.]

Hi KPR,

If you want the entire system accuracy, including the load cell, we definitely need to include the load cell accuracy in our calculations. I am not sure which document you were looking at to get the accuracy thus far, but KB 2X4HGEBG gives a great explanation about accuracies. In order to include the load cell accuracy, first get the absolute accuracy of the load cell, and then put this in the equation ‘System Accuracy = ( (Absolute Accuracy 1)^2 + (Absolute Accuracy 2)^2 + (Absolute Accuracy 3)^2 + ...) )^(1/2)’ as ‘Absolute Accuracy 4’.