Waters 2489, Обзор и руководство по обслуживанию

Страница: 139 / 150

June 11, 2015, 715004752 Rev. A
Page 139
B.4 Performance specifications
The following table lists the performance specifications for the 2489 UV/Vis detector.
B.5 Optical component specifications
The following table lists the optical component specifications for the 2489 UV/Vis
detector.
Table B–4: Performance specifications
Attribute Specification
Wavelength range 190 to 700 nm
Bandwidth ≤ 5 nm
Wavelength accuracy
±1.0 nm (via patented erbium
a
filter)
a. US Patent Numbers: 6,423,249 and 6,783,705
Wavelength repeatability ±0.1 nm
Baseline noise
b
, single
wavelength (dry)
b. ASTM E685-93
≤ 5 x 10-6 AU, 230 nm, 10 points/s, 30-s segments, dry
analytical flow cell)
Baseline noise
b
, single
wavelength (wet)
≤ 8 x 10-6 AU, 230 nm, 10 points/s, 30-s segments, 1
mL/min acetonitrile, analytical flow cell
Baseline noise
b
, dual
wavelength (dry)
≤ 35 x 10-6 AU, 230 nm, 280 nm, 1 point/s, 30-s
segments, dry analytical flow cell
Baseline noise
b
, dual
wavelength (wet)
≤ 45 x 10-6 AU, 230 nm, 280 nm, 1 point/s, 1 mL/min
acetonitrile, analytical flow cell)
Linearity
b
≤ 5% at 2.5 AU, propylparaben at 257 nm
Drift
b
≤ 1.0
×
10-4 uAU/hr
Measurement range 0.0001 to 4.0000 AU
Filter time constant range Single wavelength: 0.0125 to 5.0 seconds
Dual wavelength: 1 to 5 seconds
Sampling rate up to 80 points/s
Analog sampling rate 10, 20, 40, 80 Hz (channel A)
10 Hz only (channel B)
Table B–5: Optical component specifications
Attribute Specification
Light source Deuterium arc lamp,
Warranty: 2000 hours or 1 year (whichever comes first)
Photodiodes 2 silicon photodiodes (matched pair)