84
Expanded programs
6.1.1.3 Calibration settings for single and Multi Wavelength mode
A method is calibrated by determining the absorbance values of
several standard solutions of known concentration.
Create and save a calibration curve by entering values or
measuring standards or entering formulas (Table 9).
Calibration by "Enter values"
1. Select Enter values.
2. Press Continue.
3. Press +.
4. Enter the standard concentration.
5. Press OK to confirm.
6. Enter the corresponding absorbance value.
7. Press OK to confirm.
8. If necessary, repeat until all values have been entered.
Note: To change a value in the table, mark the corresponding row. Press
the key of the unit (e. g. mg/L) or Abs. Enter the changed value.
Table 9 Calibration settings
Option Description
Enter values
Create a calibration table by entering the concentration values and the corresponding
absorbance values of the standard solutions be measured. The absorbance values are applied
in a diagram against the concentrations of the standard solutions. The calibration curve is
graphically presented (page 84).
Measure standards
Create a calibration table by entering the concentration values of the standard solutions to be
measured and then determining the corresponding absorbance values by measuring the
standard solutions. The absorbance values are applied in a diagram against the concentrations
of the standard solutions. The calibration curve is graphically presented (page 85).
Enter formula
If it is possible to determine the calibration curve from the mathematical relationship between
concentration and absorbance through linear regression or another curve adaptation, the
respective formula (linear, polynomial 2nd or 3rd order can be selected from a list and the
corresponding factors can be entered (page 86).
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