Hach-Lange DR 3900 User Manual - Manual (Page 102)

102
Expanded programs
Concentration Resolution:
1. Press Concentration Resolution in the "Options" menu.
2. Select the resolution.
3. Press OK to confirm.
4. Press Return to return to the results screen.
6.5.2 Complete a reading in the Multi Wavelength mode
1. Insert the zero solution cell into the cell compartment.
2. Press Zero.
Note: The Read key does not become active until the zero reading
has been completed.
3. Insert the analysis cell into the cell compartment.
4. Press Read.
5. For data storage, refer to section 5.3.1, page 43 .
6.6 Wavelength Scan mode – recording of absorbance and transmission
spectrums
In the Wavelength Scan mode, the absorbance of the light in a
solution over a defined wavelength spectrum is measured. While
the scan is taking place, the cell compartment cover must be
closed. Therefore, a scan of the round cell compartment is not
possible.
The reading results can be displayed as a curve, as percentage
transmittance (%T) or as Absorbance (Abs). The collected data
can be printed as a table or a curve.
The data is available for formatting changes. These include
automatic scaling and zoom functions. Maximum and minimum
values are determined and shown as a table.
The cursor can be moved to any point on the curve for the
purpose of reading off the absorbance or transmittance value and
the wavelength. The data associated with each data point can
also be shown as a table.