Specifications

46
Linearity
Linearity calculates a linear regres-
sion using the least square error for
the model y = a + bx. Linearity can
be carried out by multiple injections
and multiple determinations. Figure
30 shows the planning dialog of
checkpoint “linearity”.
Planning data
• Determination method:
• Regression weighting:
unweighted, weighted 1/x,
weighted 1/x
2
or
• Proportionality ( test for
validity of one point
calibrations)
• Other data:
• Number of levels
• Y-units
• Multiple injection possible
• Multiple determination
possible
Output settings for calculations
• Residual standard deviation
• Method standard deviation
Calibration function
The calibration function is the cor-
relation between the expected value
of the test characteristic, e.g. the
extinction (see DIN 55350 part 13),
and the content, e.g. a mass concen-
tration. You can choose the maxi-
mum degree of curve fit for the cali-
bration curve. 1st order is standard
and 3rd order is the maximum
(cubic curve). Figure 31 shows the
planning dialog of checkpoint “cali-
bration function”
Planning data
• Number of levels
• Unit of values
• Curve fit display 1-3
• Multiple injection possible
• Multiple determinations
possible
Figure 30
Planning dialog of checkpoint “Linearity”
Figure 31
Planning dialog of checkpoint “Calibration Function”