Waters 2998, Обзор и руководство по обслуживанию

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December 5, 2017, 715004753 Rev. B
Page 81
B.5 Optical component specifications
The following table lists the optical component specifications for the 2998 PDA detector.
Baseline noise, UV (dry)
b
≤ 10 x 10-6AU, peak to peak
Filter = 1 second, 30-second segments
Wavelength = 254 nm
Bandwidth = 3.6 nm (3-pixel bunch)
Flow cell = dry analytical, 10 mm
Sampling rate = 2 points/s
Baseline noise, UV (wet
c
)
b
≤ 10 x 10-6AU, peak to peak
Filter = 1 second, 30-second segments
Wavelength = 254 nm
Bandwidth = 3.6 nm (3-pixel bunch)
Flow cell = analytical, 10 mm
Sampling rate = 2 points/s
Flow rate = 0.5 mL/min
Solvent = water/acetonitrile, 90:10
Drift, UV (dry)
b
≤ 1.0 x 10-3 AU/hr
Filter = 1 second, 30-second segments
Wavelength = 254 nm
Bandwidth = 3.6 nm (3-pixel bunch)
Warm-up time = 60 minutes
Environmental stability = ±2

C/h
Flow cell = dry analytical, 10 mm
Sampling rate = 2 points/s
Linearity
b
<5% at 2.0 AU, propylparaben series, at 257 nm, analytical flow
cell
Sampling rate 1, 2, 5, 10, 20, 40, and 80 Hz
a. US patent numbers 6,423,249 and 6,783,705
b. Other than documented deviations, follow ASTM 1657-98
c. Wet testing should be done with 90:10 water/acetonitrile, to minimize the effects of oxygen at 230 nm. 90:10
water/methanol can be substituted with appropriate solvent conditioning.
Table B–5: Optical component specifications
Attribute Specification
Light source Deuterium arc lamp, 2000 hour warranty or 1 year (whichever
event occurs first), front accessible
Flow cell design
TaperSlit™
a
Nitrogen purge Purge fitting present on rear of chassis
Table B–4: Performance specifications (continued)
Attribute Specification