Waters 2487 UV/Vis Detector
|
Wavelength range
|
190 to 700 nm
|
Bandwidth
|
<5 nm
|
Wavelength accuracy
|
+1.0 nm
|
Wavelength repeatability
|
+0.1 nm
|
Single λ dry noise
|
<5 µAU (at 230 nm, 1 –second digital filter,
30-second segments, 10-Hz data rate, analytical cell)
|
Wet noise
|
<8 µAU (at 230 nm, 1-second digital filter 30-second segments,
10-Hz data rate, analytical cell)
|
Dual channel noise (dry)
|
<35 µAU (measured at 230 nm, running at 230 to 280 nm with
2-second filter at 1-Hz data rate; dry, analytical cell)
|
Dual channel noise (wet)
|
<45 µAU (measured at 230 nm, running at 230 to 280 nm with
2-second filter at 1-Hz data rate; 1 ml/min, flow of
acetonitrile, analytical cell)
|
Linearity
|
<5% at 2.5 AU, propylparaben at 257 nm
|
Drift
|
1.0 x 10-4 AU/hr. max (∆T = +2°C/hr.)
|
Thermal drift
|
1.0 x 10-4 AU/°C max (∆T = +2°C/hr.)
|
Sensitivity setting range
|
0.0001 to 4.0000 AUFS
|
Filter setting range
|
Single-wavelength: 0.1 to 5.0 seconds
Dual-wavelength: 1 to 50 seconds
|
Time-constant
|
To 5.0-second Hamming filter
|
Digital data rates
|
1,2,5,10,20,40,80 Hz (single channel)
1,2 Hz (dual channel)
|
Analog output data rates (single λ mode)
|
10,20,40,80 Hz (channel A)
10 Hz only (channel B)
|
Lamp source
|
30-W High Brightness Deuterium lamp, 0.5 nm aperture, pre-aligned 2000 silicon photodiodes (matched pair)
|
Second-order filter
|
Automatic for wavelengths >370 nm
|
Wavelength calibration filter
|
Erbium filter, used at startup or on demand
|