Technical data

Measuring Samples
36 Agilent MicroLab Software Operation Manual
5 The software will display a graph showing the intensity
(absorbance) of the sample measurement. This screen is used to
ensure that the sample has been correctly placed at the sampling
interface. For oil applications using the Agilent 4500t FTIR, the
value should be maximized. For Agilent 4100 ExoScan FTIR
applications using reflectance, the value should be between 0.1
and 2 AU; ATR measurements should be between 0.05 and 1 AU.
6 Enter a file name in the Sample ID field; this will be the file name
under which the sample data is saved. Enter further information
about the sample in the Comment field.
7 Click the Next button to begin sample measurement. The
software will co-add sample scans as specified in the method.
8 During sample measurement, the sample needs to remain at the
focus of the sampling technology. For the Agilent 4500t FTIR, the
sample cell should not be adjusted during the measurement. For
the Agilent 4100 ExoScan FTIR, the instrument should not be
moved from the sample surface during the measurement. The
software monitors the sample signal during measurement. If the
signal falls below a preset threshold, the collection will stop.
Once the sample focus is regained, the software will immediately
start collecting data.
NOTE
The progress bar shows the advancement of the data collection. When the
progress bar is complete, the prompt will change to Transferring Data. Once this
occurs, the measurement is complete and the instrument can be removed from
the sample.
9 When the sample measurement is complete, the software will
display the method results in the Results screen. The sample
spectrum and the calculated method results will automatically be
saved. The data can be returned to at any time from the Previous
Results screen.