Waters ACQUITY UPLC Operator's, Overview And Maintenance Manual page 26

interval depends on the exposure time. For example, if exposure time is
25 msec, and sample rate is 20 Hz, then readings per data point are
1 sec
--------------------------
20 samples
The readings are averaged and reported as a single data point.
Combining spectral resolution and sample rate
A high value of the spectral resolution parameter and sample rate affect
noise and spectral detail in opposite ways. In normal use, high spectral
resolution indicates a numerically small spectral resolution parameter.
The data storage rate is based on wavelength range, spectral
Tip:
resolution, and sample rate. Specify these parameter values in the
General tab of the PDA Instrument Method Editor. For details, refer to
the Empower or MassLynx online Help.
Filtering data
In the General tab of the PDA Instrument Method Editor (for details, refer to
the Empower or MassLynx online Help or the ACQUITY UPLC Console
online Help) you can apply an optional noise filter (via the Digital Filtering
parameter) to the data acquired. The following table lists the digital filter
settings for the allowable data rates.
Digital filter settings for data rates
Data
Slow
Rate
1 10.000
2 5.000
5 2.000
10 1.000
20 0.500
40 0.250
80 0.125
14
1 exposure 1000 msec
× ×
------------------------- - ------------------------- -
25 msec 1 sec
Normal Fast
4.000 1.000
2.000 0.500
0.800 0.200
0.400 0.100
0.200 0.050
0.100 0.025
0.050 0.0125
exposures
= 2 ----------------------- -
sample