Metrohm 746 VA Trace Analyzer - Manual (Page 113)

4 Introduction to the operation
746 VA Trace Analyzer / 747 VA Stand
4-28
On the dialog page "CURVES" various experimental curves can be displayed for both
individual substances and segments. Moreover, parameters for the scaling, the sub-
stance recognition and the baseline calculation can be changed interactively and
measured spike values removed manually.
You will find further information regarding this dialog page in section 5.5.3.
• The curves which are shown can be seen from the title line. The curve
displayed in black is the smoothed curve of the substance lead with VR
number 00 ( Pb-00-smoothed ). In addition, the curves 10 and 20 are
shown in gray ( grouped VR: *0 ). The calculated baseline for the curve
00 , the peak voltage and the two base points of the lead curve are also
drawn in.
• Below the curves is a list of the results of the peak evaluation for the
curve 00 : peak voltage U.peak , peak current I.peak , peak area P.peak ,
peak width U.width and the two voltage differences to the front base
point dU.front and the rear base point dU.rear .
• This dialog page offers you extensive possibilities with the aid of the
softkeys:
Display
segment
Display of segment associated with the substance with
the possibility to eliminate measured spike values.
Select
segment
Selection of substance and VR number for the display.
Select
curve
Selection of curve type for the display. Possible are:
Original Curve of the original measured values
Processed Curve of the measured values after
automatic spike elimination
Smoothed Smoothed curve
Derived Derived curve
Subtracted Subtracted curve (baseline subtracted
from the smoothed curve)
Calibr. Calibration curve
Next
VR
Display next curve
Prev.
VR
Display previous curve
Scale
New axis scaling for the substance curves
The temporary changes made here to the "Display/Plot"
parameters can also be incorporated permanently in the
method with the softkey .
Modify
recogn.
Modify parameters for substance recognition
The temporary changes made here to the "Recognition"
parameters can also be incorporated permanently in the
method with the softkey .
Modify
baseline
Modify baseline parameters
The temporary changes made here to the "Baseline"
parameters can also be incorporated permanently in the
method with the softkey .