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The linearity of a transducer is usually expressed as

  • A.the number of points on the calibration curve that lie on a straight line
  • B.the largest departure from the best straight line, as a percentage of full scale
  • C.the ratio of the output at full scale to that at half scale
  • D.the slope of the calibration curve at the midpoint of the range

Answer: B

A straight line is fitted to the calibration data and the greatest deviation from it is quoted. Which line is fitted matters, since a line through the end points and a least squares line give different figures for the same data.

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