BUCHI DuMaster D-480 - Manual (Page 67)

Operation Manual D-480 ©BÜCH Labortechnik AG
4 - Understanding the instrument and planning its use 67
If your series includes samples previously defined as calibration samples, you can use them to
calculate calibration coefficients. You can define and determine up to two calibration ranges
according to which polynomial degree you want to determine the calibration curve.
In this case, the calibration view displays the following information:
 For each defined calibration range a graph display of the calibration curve optimized for the
respective calibration samples.
 The calibration coefficients computed according to the selected polynomial degree.
 The correlation coefficient for the depicted calibration curve that allows you to assess the quality
of calibration.
In the graph display, the samples used for compute the calibration curves are displayed as small
circles. You can click one of these circles to display further information on the particular sample, see
Background knowledge required for calibration (on page 52). This information allows you to
assess whether the sample must be treated as an "outlier" and therefore excluded from the
calculation of the calibration coefficients. If you have assessed the calibration curves in this way and
browse on to the next view, the "calibration coefficient" dialog is displayed with the current computed
values. When you confirm this dialog by clicking OK, the calibration coefficients for the series are
applied and the content of the calibration view is deleted (message: "No calibration or calibration
finished").
Note on data output
The selected screen view of the combi view also corresponds to the display in a printed report.
Status view
Introduction
The following section describes what information about the analysis procedure and the condition of
the instrument is displayed in the status view.
View
The following screenshot shows the status view in offline status:
Meaning of the colored background
On the basis of the color of the status view background you can tell straight away whether the PC is
properly connected to the analyzer. The meaning of the colors is:
 green: The analyzer is connected to the PC and switched on. With the aid of the PC you can
 enter analysis or instrument parameters
 start or abort analyses
 perform maintenance or diagnostics tasks.
 gray: The analyzer is not connected to the PC or switched off. The operating software is running
in offline status.