ALTANA LCS III - Manual (Page 67)

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Standard Operations
The navigation functions of the wavelength scan graph or a wavelength scan analysis are described in
Table 10 .
5.7.3.3 Work with reference scans
There are two options to work with Reference Scan:
First option:
1. Press Reference: Off in the Options menu to select another
scan to display on the same screen with the current scan.
Highlight the required scan number and press
Highlight Reference.
Note: After selecting a reference scan the Reference: Off key in the
Options menu turns into Reference: On.
Note: Only scans that have the same wavelength range and step can
be displayed using the overlay option. This process can be repeated
until all matching scans are displayed.
2. The reference curve is shown in orange. The absorbance or
transmittance value and the associated wavelength are
highlighted in grey.
Note: A black and an orange box are shown in the left corner of the
display. The orange box relates to the reference scan and the black
one relates to the current wavelength scan.
3. To complete the wavelength scan reading, see section 5.7.3.2
on page 64 .
• The newly plotted wavelength scan curves and the
absorbance or transmittance value are highlighted in black.
• In addition, the display shows the difference between the
wavelength scan curve and the reference curve against the
wavelength.
4. Press the black or orange small box in the left upper corner on
the screen to switch between the actual wavelength scan and
reference scan.
Table 10 Navigating the wavelength scan
Cursor Function/
Zoom Function
Description
Curve Icon
(Choice of Cursor Mode) Choice of Cursor Mode Peak/Valley (cursor moves between minimum/maximum absorbance
values) or Cursor Mode Tracking (cursor moves over each data point of the scan).
Arrow keys
The arrow keys are used (right/left) to move the cursor (depending on the selected mode) to the
next data point. The data of the data point (wavelength/absorbance or transmittance value) are
highlighted on the x and y axes.
Note: Press any point on the curve to display the associated data.
Zoom Icon
This function is used to magnify the section of the curve in the vicinity of the cursor. The original
curve size can be restored by pressing the zoom icon again.