The linearity error corresponds to the maximum difference in gradient or the maximum deviation between the target characteristic curve (straight lines) and the actual characteristic curve for the measuring instrument. The size of the deviation can be determined in various ways (Figure L 22):
- Fixed point method: both end points are connected to each other (a);
- minimum quadratic deviation through the zero point (b);
- minimum quadratic deviation with two intersections (tolerance range method, c).
![989b94026b9772197c61845d677ed7acb35be472 0001_linearitaetsfehlerbeimessgeraeten.gif](/fileadmin/smc/files/989b94026b9772197c61845d677ed7acb35be472.gif)
Figure L 22: Process for determining a linearity error