Hach-Lange DR 3900 User Manual - Manual (Page 103)

103
Expanded programs
6.6.1 Set up the wavelength scan
Press Wavelength Scan in the Main Menu. Press Options for
Parameter Setup.
λ Setting of the wavelength
1. Press the
λ key in the "Options" menu to select the
wavelength range and the wavelength step.
2. Press the upper left key to select the lower wavelength.
3. Enter the lower wavelength.
4. Press OK to confirm.
5. Press the upper right key to select the upper wavelength.
Table 14 Options during wavelength scan
Option Description
More Further options are displayed
Folder icon To store the scan data
Reference Off/On
From the displayed list of stored scans, a record is selected for use as a reference
scan/superimposed scan. This can be highlighted or shown in the background in comparison
with the actual measured scan.
Note: This option is only available when there are stored scans with the same wavelength range
and step.
λ Enter the wavelength spectrum and scan interval
Select View
Enables the user to switch the display back and forth between the scan data tables
(wavelength/absorbance) and the graph of the curve.
Note: "Select View" will be activated after the first reading.
Cursor Mode
To select Track or Peak/Valley. The selection for this menu item determines to which points on
the graph the cursor moves.
Send Data To send data to a printer, computer or USB memory stick (Type A)
Integral: On/Off The integral gives the area and the derivative of the integral gives the original function
Scale & Units
Scale: In the automatic Scaling mode, the y-axis is automatically adjusted so that the total scan
is displayed.
The manual Scaling mode allows sections of the scan to be displayed.
Units: Choice of absorbance or transmittance.
Recall measurement
data
Recall saved measurement data, wave-length scans or time courses, see section 5.3, page 43 .
Instrument Setup mode Basic data of the instrument, refer to section 5.2, page 27 .