PerkinElmer Frontier FT-NIR - Page 82

82 . Frontier IR Single-range Spectrometers User's Guide
6. Working clockwise around the filter wheel, identify the next available filter position.
The positions already filled in the filter wheel will depend on your instrument type
(Figure 50).
A Frontier FT-IR will have a polystyrene filter in Position 2 and a Frontier FT-NIR will
have a polystyrene filter in Position 6. A Frontier FT-NIR will have a NG11 Schott glass
sample in Position 3. The methane cell for AVI will be in Position 4.
Position 5 and Position 7 are always available for your custom filters.
NOTE: Do not change the positions of the standard filters, or place a filter in Position 1.
Figure 50 Filter wheel positions
7. Release the filter holder by turning it about 30 degrees counter-clockwise, and then
remove the filter holder and foam spacer.
8. Place the filter in the hole, place the foam spacer on top of it, and then fit the filter
holder.
Figure 51 illustrates the assembly sequence.
Figure 51 Filter, foam spacer and filter holder
Opto flag
Position 7:
for custom filter
Position 6:
NIR polystyrene
Position 5:
for custom filter
Position 4:
Methane cell
Position 3:
NG11 glass
Position 2:
MIR polystyrene
Position 1: None
Do not place filter here
Foam spacer
Filter holder
Filter