108 ACF5000 FTIR ANALYZER SYSTEM | OI/ACF5000-EN REV. A
Configuring filter
Menu path
MENU → Configure → Component-specific → Filter →
Select Component → ...
Procedure
Parameter Explanation Action
Non-linear filter:
T90-1
Low-pass time constant for constant measured
value. Range for
FTIR sample components: 0 to 300 s
FID and O
2
sample components: 0 to 60 s
Set
T90-2
Low-pass time constant for measured value
changes. Range: 0 to 60 s.
Set
Switching
threshold
Switching threshold. When exceeding, T90-2 be-
comes effective.
Set
Non-linear filter
For the non-linear filter, it is practical to set T90-2 ≤ T90-1.
The switching threshold (in %) usually refers to the highest measuring range
set (reference measuring range).
Recommendations for FID:
T90-1 = 20 s, T90-2 = 1 s, switching threshold = 0.001%
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