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OSCAR G2
Manual
D01-44en201810
Software V.1.1.6
(C)TriOS Mess- und Datentechnik GmbH
Bürgermeister-Brötje-Str. 25
D- 26180 Rastede/Germany
48 / 62
4.2 Data calculation with MSDA_XE
The approximation method of the calculation of absorption in 1/m under consideration of the
reflectivity of the cavity is not integrated to the OSCAR firmware yet. The calculation of
absorption has to be done external with the software MSDA_XE .
OSCAR calculates the attenuation without the consideration of reflectivity. Attenuation A is
calculated as
0
log( ) log( )
I
A T
I
   
(9)
I
0
= calibrated intensity of the water base (zero line)
I = calibrated intensity of the sample
The absorption calculated with the software MSDA_XE from OSCAR calibrated spectra has
the unit 1/m on the log
10
scale. So it is easily possible to compare the absorption spectra
measured with OSCAR with other common absorption spectrometer
The actual version of the MSDA_XE software can be downloaded from the website
www.trios.de.
4.2.1 Calculation of the reflectivity
On the OSCAR Control page within the MSDA_XE software you can calculate the reflectivity
for a new pair of a waterbase (zero line) and a Nigrosin measurement.
The sensor will be delivered with a CD-ROM with device files and calibration files for the
sensor. Each sensor has a unique device file, which has to be imported into the software, to
run the sensor. The device file has the name: OSCAR
_BXXX.ini, whereas ‘BXXX’ stands for
the serial number of the OSCAR . Additionally the water base file and the reflectivity file are
required.
For data calculation proceed as follows

Install the MSDA_XE software

Open the MSDA_XE software