Controller / User Interface | 4-25
Filter Sequence The order in which the filters pass in front
of the light path of the source lamps:
000 = 1-3-5, 4-6-2 (typical factory default
for Model 932S Analyzers)
001 = 3-5, 4-6-1-2 (custom applications)
010 = 1-3-4-5, 6-2 (custom applications)
011 = motorless (1-3-2) (typical factory
default for Model 931S Analyzers)
100 = 1-3-5, 4-6-1(2) (custom applications)
Processing Filtration
MaxT90 (sec) The time (default is 60 seconds) required
for the output signal to reach 90 percent
of the final value after a step change in the
concentration. Larger values reduce the
noise level on the output signal but, at the
same time, increase the sample response
time. Do not change this.
Sigma of Adaptive Filtering
The expected noise level for the lamps
(default is 0.00025). Do not change this.
Samples per Peak**
Model 931S Analyzers: The number of times the PMT signal is mea-
sured for each filter.
Model 932S Analyzers: The number of times the PMT signal is mea-
sured while a filter is completely within the light path.
Delay (x1.6 µs)**
Model 931S Analyzers: The time from the beginning of the lamp pulse
to the first PMT signal measurement.
Model 932S Analyzers: The time interval between when the filter
becomes completely within the light path and the first PMT signal
measurement (shown as multiples of 1.6 microseconds (µs)).
Wheel Revolutions for Avg**
The number of Chopper (Filter) Wheel rotations per minute (RPM)
used to calculate its RPM during one measuring cycle. Model 932S
Analyzers only.
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