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Dionex VWD Operator's Manual
A.4 Detector
Optical System
Light Sources
Wavelength Range
Wavelength
Accuracy
Wavelength
Repeatability
Noise (single
wavelength)
Noise (dual
wavelength)
76
Double-beam forward optics design (monochromator)
Dual-wavelength UV-Vis detector
Deuterium lamp (for ultraviolet wavelength detection)
Tungsten lamp (for visible wavelength detection)
190 to 900 nm
±1 nm (over detector lifetime)
±0.1 nm
<± 3.5 µAU (typical <± 2.5 µAU) under the following conditions:
Dry (dummy) flow cell, 254 nm, 1 second time constant,
deuterium lamp on only, 60 minutes or less of warm-up time
< 5.0 µAU (typical) under the following conditions:
Dry (dummy) flow cell, 520 nm, 1 second time constant, tungsten
lamp on only, 60 minutes or less of warm-up time
< 7.5 µAU (typical) under the following conditions:
Wet standard cell, 520 nm, flowing methanol at 1.0 mL/min,
1 second time constant, tungsten lamp on only, 60 minutes or less
of warm-up time
<± 25 µAU (typical <± 10 µAU) under the following conditions:
Dry (dummy) flow cell, 254 and 280 nm, 2 second time constant,
2 Hz data collection rate, deuterium lamp on only, 60 minutes or
less of warm-up time
< 30 µAU (typical <± 10 µAU) under the following conditions:
Dry (dummy) flow cell, 450 and 520 nm, 2 second time constant,
2 Hz data collection rate, tungsten lamp on only, 60 minutes or less
of warm-up time
< 50 µAU (typical <± 10 µAU) under the following conditions:
Wet standard flow cell, 450 and 520 nm, flowing methanol at
1.0 mL/min, 2 second time constant, 2 Hz data collection rate,
tungsten lamp on only, 60 minutes or less of warm-up time
Doc. 065377-01 1/12
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