Bruker HYPERION, User Manual

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144 HYPERION User Manual Bruker Optik GmbH
Repair and Maintenance 6
➣ Note: The focus position is indicated acoustically by a beep and optically by the In-
focus LED (fig. 6.9a). When the ATR crystal has reached the focus position, the In-
focus LED turns from red to green for a short moment. Then it goes off.
When the ATR crystal is in the focus position, maximum signal (amplitude value) has to
be displayed in OPUS. (See fig. 6.9b.) If this is not the case, the height setting of the
ATR crystal needs to be corrected (i.e. adjustment of the ATR crystal in vertical direc-
tion).
6.4.7 Correcting the height setting of the ATR crystal
General information
The screw for adjusting the height setting of the ATR crystal is situated at the ATR objec-
tive top side next to the In-focus LED cable outlet. (See fig. 6.10a.)
Correct the height setting of the crystal (i.e. adjustment of the ATR crystal position in z-
direction) with the ATR objective being attached at the revolving nosepiece and being
placed in the beam path.
Required tools
hex wrench (Note: This hex wrench is included in the delivery scope of the ATR crystal.)
Procedure
1. Move the microscope stage downwards and swing it out of the beam path in the
front position.
2. Actuate the rocker switch and pull the outer casing of the ATR objective downwards
as far as it will go (i.e. until it snaps into place at pressure level 5). (See
section 4.12.5.)
Figure 6.9: a) Visual focus indicator
Amplitude value
(Signal intensity)
In-Focus LED
b) OPUS dialog Measurement