ABB NTCL01 Communication terminal unit

ABB NTCL01 Communication terminal unit

If necessary, the method described previously for correcting gain and offset error may be extended to include linearity by taking more points along the transfer function and processing subsequently acquired data according to a polynomial fit of the calibration points. Alternatively, and preferably for data acquisition boards with no more than 12 bits of resolution, you can determine the nonlinearity of the system on a code-by-code basis, and you can subtract the error of each code from any measurement that returns that value. This method has the advantage of correcting differential as well as integral linearity errors. However, this method may be timeconsuming.

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