Analyzing Samples
Agilent Cary 630 FTIR Spectrometer User’s Guide 31
Figure 6. ZnSe ATR accessory sample press in highest position
In the sample analysis mode, the sample press is lowered such that
the tip is in contact with a solid sample. In this position, contact is
made between the sample and the infrared energy emitting from the
ZnSe window.
NOTE
If the sample is a liquid or paste, the sample press does not need to be used at
all.
CAUTION
When using the swivel press mechanism, please ensure that the press and tip
are in the upmost position before turning the press out of or into position
When in the sample analysis mode, the ATR sample pathlength is fixed
based on the number of reflections in the ATR. The alignment of the
accessory is also pre-set at the factory, and so there is no optical or
mechanical adjustment required.
Cleaning
To clean the ZnSe ATR accessory in preparation for analysis:
1 Open the sample press by rotating the top knob counterclockwise
until the top of the press travel is reached (see Figure 5).
ZnSe sampling window
Sample press knob
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