Metrohm viva 1.0 (process analysis) - Manual (Page 734)

6.8 Colorimetric sensors subwindow
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viva 1.0 (for Process analysis)
Monitoring coefficient of determination
on | off (Default value: off)
If this check box is activated, then the coefficient of determination (R 2 ) cal-
culated from the calibration data will be monitored after a new calibra-
tion. If this number lies outside the defined range, then a corresponding
message will appear and you can decide whether the calibration should
nevertheless be applied or if the previous calibration data should be
retained.
Lower limit
Lower limit value for the coefficient of determination.
Only editable for Monitoring coefficient of determination = on, oth-
erwise inactive.
Input range 0.00000 - 1.00000
Default value 0.95000
6.8.3.5 Properties - History
Tab: Configuration ▶ Colorimetric sensors ▶ Edit ▶ Properties... ▶ History
History table
The table contains the last 10 calibrations for the selected colorimetric
sensor and can be neither edited nor sorted. The individual calibrations are
sorted according to date in such a way that the most recent determina-
tion is listed last. The table contains the following columns:
Coefficient of determination
The values are shown in the following colors:
￭ Blue, if the values have been assigned automatically by a method.
￭ Black, if the values have been entered manually.
￭ Orange, if the values are outside the warning limits.
￭ Red, if the values are outside the intervention limits.
If the warning or intervention limits are breached, then the line number
will also be shown with an orange and red background, respectively.
Confidence interval
Shows the confidence interval within which the measured values for the
determination of the calibration curve must lie. Values outside this range
are called outliers, they are not integrated in the calculation of the calibra-
tion coefficient.
Outlier
Total number of outliers (values outside the confidence interval).