PerkinElmer Spotlight 400 Series, User Manual

Page: 86 / 120

86 . Spotlight 400 Series User’s Guide
Fitting a Crystal Assembly to the ATR Objective
1. Remove the ATR crystal holder, as described on page 85.
2. Place the crystal holder on a bench, with the crystal upwards.
3. While holding the crystal assembly in place, unscrew the knurled height adjusting nut.
The crystal assembly is under spring pressure. If you do not hold the assembly in place,
the spring may be lost.
4. Remove the crystal assembly.
Leave the spring in the ATR crystal holder.
5. Place the new crystal assembly into the ATR crystal holder and refit the height-adjusting
nut.
Take care not to damage the crystal.
6. Refit the ATR crystal holder to the imager as described on page 80.
7. Align and adjust the ATR crystal holder.
Figure 34 The ATR crystal assembly