Waters 2998, Обзор и руководство по обслуживанию

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December 5, 2017, 715004753 Rev. B
Page 21
The following table lists the digital filter settings for the allowable data rates:
Lower filter-time constant settings produce these effects:
• Narrow peaks, with minimal peak distortion and time delay
• Very small peaks may become more difficult to discriminate from baseline noise
• Less baseline noise is removed
Higher filter-time constant settings produce these effects:
• Greatly decrease baseline noise
• Shorten and broaden peaks
For the highest resolution, select an appropriate sampling rate, and choose a fast filter-time
constant. For the highest sensitivity, select an appropriate sampling rate, and choose a normal
filter-time constant.
The following figure shows the relationship between increased filter-time constant and
absorbance.
Table 1–2: Digital filter settings for data rates
Sampling
rate
Slow Normal Fast
1 4.000 2.000 1.000
2 2.000 1.000 0.500
5 0.800 0.400 0.200
10 0.400 0.200 0.100
20 0.200 0.100 0.050
40 0.100 0.050 0.025
80 0.050 0.025 0.0125