INFICON Explorer Portable Gas Chromatograph - Manual (Page 229)

Explorer Operator Manual
227
Figure 12 Line Segment Calibration Curve
If a third, higher concentration is stored, then the concentrations above the second
value are measured using a sensitivity value calculated from the slope of the line
connecting the second and third concentration response points. You can store up to
five concentration points.
Linear Calibration Curve
If you select linear calibration, Explorer will draw the best line through all the
points. It will use a linear least squares fit to determine the slope of the line. The
line will always start at (0, 0). If you have stored only one point you will have a line
segment curve. If you have stored 2 or more points,
Explorer will use the least
squares fit.