Agilent Technologies Cary 8454 Installation Manual page 62

4 Installing Accessories
Optical Filter Wheel
100
80
60
40
20
0
Figure 21
Table 3
Position
0
1
2
3
The choice of when to use a filter and which filter to use should be made
only after considering all the factors that affect your measurements. If you
decide that a filter is needed, you should choose a filter that transmits the
wavelengths needed for analytical information and that blocks the
wavelengths that contribute to sample degradation. Often, your final
choice will be a compromise since sometimes even the light at the
wavelengths of analytical interest can affect your sample.
If you do not need a filter for a group of measurements, you can move the
filter wheel to position zero. This permits full light transmission. When
you will not be using the filter wheel for an extended period of time you
should remove the filter wheel assembly from the cell holder and store it
in a clean plastic bag.
62
0
1
2
3
190 200 300 400
Transmission characteristics of filter wheel filters
Filter wheel positions
Filter
None
UV roll-off
265 nm UV cut-off (at 50%T)
295 nm UV cut-off (at 50%T)
Agilent Cary 8454 UV-Visible Spectroscopy System Installation Guide
500 600 700 800 820