Expanded programs – Hach-Lange DR 3900 User Manual User Manual
Page 107
107
Expanded programs
3. To complete the wavelength scan reading, refer to
.
•
The newly plotted wavelength scan curves are shown in
black.
•
The absorbance or transmittance value and the
associated wavelength 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.
Second option:
1. Insert the zero solution cell into the cell compartment. Press
Zero.
2. Insert the analysis cell into the cell compartment. Tap on
Read.
•
The newly plotted wavelength scan curves are shown in
black.
•
The absorbance or transmittance value and the
associated wavelength are highlighted in black.
3. Press Options and then 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.
4. The reference curve is shown in orange. The absorbance or
transmittance value and the associated wavelength are
highlighted in orange.
•
In addition, the difference of the absorbance and/or
transmission value between the two scans (measured
scan and reference scan) is indicated/highlighted at each
position of the cursor.
Note: A blue 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.
5. 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.