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Bruker Optik GmbH HYPERION User Manual
Operation 4
4.12.5 Setting contact pressure levels
The measurement technique ATR requires an intimate contact between ATR crystal and
sample to obtain meaningful sample spectra. In case of the ATR objective, the optimal
contact pressure is obtained by pressing the ATR crystal against the sample with a pres-
sure that is adequate to the degree of hardness of the sample. Five different pressure
levels can be set: pressure level 1 (contact pressure: 0.5 N) for very soft samples up to
pressure level 5 (contact pressure: 8 N) for very hard samples.
4.12.6 Focussing
In viewing mode
Proceed as follows:
1. Bring the ATR crystal in the viewing mode position (i.e. upper position). See
section 4.12.4.
2. Focus on the sample by moving the stage slowly upwards.
➣ Attention: When moving the stage upwards, take care the ATR crystal tip does not
hit the stage. Potential risk of damaging the ATR crystal!
Setting a contact pressure level:
Actuate the rocker switch
① and pull
the outer casing
② of the ATR objec-
tive down until it snaps into place at the
desired pressure level.
Note: The currently set contact pres-
sure level is indicated by the red point
of the pressure level display
④.
Then, release the rocker switch again.
Attention: When setting a contact
pressure level, take care that the ATR
crystal tip
③ does not hit the stage.
Potential risk of damaging the ATR
crystal!
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