Metrohm tiamo 1.1 Manual - Manual (Page 478)

450 Method
Minimum and maximum evaluation
For the minimum or maximum measured value the associated Volume, Time and
Temperature are interpolated. The evaluation begins as soon as the slope of the
curve exceeds a particular threshold value.
Break point evaluation
A break point is used to determine sharp change of direction in the titration curve.
This evaluation is primarily used for photometric and conductivity titrations. The
method is based on the search for extremes in the second derivative of the curve.