triOS OSCAR G2, Manual, Page: 52 / 62

OSCAR G2
Manual
D01-44en201810
Software V.1.1.6
(C)TriOS Mess- und Datentechnik GmbH
Bürgermeister-Brötje-Str. 25
D- 26180 Rastede/Germany
52 / 62

On the page
“Zero Settings” you can choose the calibrated spectrum for “Blank
Reference
” (calibrated spectrum of purified water, waterbase) and the “Nigrosin
Sample
” (calibrated spectrum of Nigrosin) measured with
OSCAR.

The data for the Nigrosin Reference measured with a reference absorption
spectrometer can be copied form a textfile or an Excel sheet. For this mark the
wavelength and the corresponding absorption value (Important: The absorption value
has to be calculated on the log
10
scale) in the wavelength range 360
– 750 nm. Then
copy it and press the button “Import from clipboard° in the
OSCAR Control Field page
“Zero Settings”. The reference data will now be transformed into a dat.file which is
compatible with the MSDA_XE software.

If necessary update the temperature values.

Press “Calculate reflectivity”.
For more detailed information on the plotting options, database operations and all general
MSDA_XE features please refer to the MSDA_XE manual.
4.2.2 Calculation of absorption spectra with reflectivity
For the calculation of absorption spectra with reflectivity proceed as follows:

Download the measured data from the OSCAR.

Note: It is not possible to set the temperature and the salinity values of the measured
spectra in MSDA_XE after the measurement. So you first have to open the dat.file of
the calibrated spectra and change the value for temperature to your measured
temperature value of the medium. If you have measured in seawater, update the
value for salinity. After that, import the calibrated spectra into the database.

To calculate collected data, open main menu
– processing – spectrum – absorption
(Fig. 31).

Choose calibrated input. (Note: You can choose only the calibrated input, because
the calibrated spectra of the OSCAR are temperature corrected. It is not possible to