User`s guide

Getting Started with Optical Heads What is an Optical Head?
18 Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition
3
Attach the upper part of the heat sink to the integrating sphere. Slide the
upper part over the connector adapter with the largest diameter facing
opposite to the sphere. Tighten the screws with the Allen key enclosed
in the Heat Sink Kit (see Figure 6 ).
Figure 6 Attaching the Upper Part of the Heat Sink