Agilent Technologies 4500 Series Operation Manual page 20

Analyzing Samples
Figure 3. TumblIR with accessory window facing up
In the sample analysis mode, the TumblIR is rotated such that the
accessory optical window is facing down towards the 4500t FTIR
sample mounting area. In this position, infrared (IR) energy passes
through the sample making measurement possible. Be sure to rotate
the TumblIR arm completely around until it reaches the detent and
snaps into position. This detent keeps the accessory stationary
during sample measurement (see Figure 4).
Figure 4. TumblIR with accessory window facing down
20
Top window
Bottom window (2 mm diameter yellow
surface)
Agilent 4500 Series FTIR Operation Manual