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Scanning Dynamic Absorbance Detection D A D - Wavelength Range 190-700nm
- Optical Bandwidth 4nm constant
- Digital Resolution 1nm
- Wavelength Accuracy 1nm
- Wavelength Reproducibility 0.1nm
- Absorbance Range 0.001 to 3A
- Scan Speeds Up to 1000nm/s UV scan in 200ms
- Baseline Flatness 0.002A over most of range
- Second Order Filter Fast automatic insertion at 370nm
- Noise < 0.7 x 105 A, 230nm, 2 s T/C, using air test cell
- Drift < 0.7 x 104 A/h, 230nm, at equilibrium using air test cell
- Overlayed Scans Up to 8 scans may be overlayed
- Scan Trigger At start of peak, set absorbance value, point of inflection or at peak
- Number of Peak Scans Up to 100 peaks for a single elution
- Scan Storage Up to 100 scans password protected
- Multiple Scans of a Peak Up to 8 scans of any peak
- Used with DataStream Software Data to PC, PC control, scan triggering, Lambda max. scans, peak purity and purity calculation, graphical presentation, overlay, normalisation, disk storage, library store and search, transfer to Excel etc and many other functions.
Variable Wavelength Detection V W D - Wavelength Range 190-700nm
- Wavelength Accuracy 1nm
- Wavelength Reproducibility 0.1nm
- Absorbance Range 0.001 to 3A
- Absorbance Linearity Better than 1% 0.001 2A
- Optical Bandwidth 4nm constant
- Dual Wavelength Operation Simultaneous measurement at 2 wavelengths and ratio
- Wavelength Programming Measurements at up to 6 different wavelengths with a time program and selectable sensitivity
- Noise 0.5 x 105 A at 230nm, 2s T/C, using air test cell
- Drift 0.3 x 104 A at 230nm at equilibrium, using test cell
- Noise Dual Wavelength 2 x 105 A at 250/280nm
- Drift Dual Wavelength 2 x 104 A at 250/280nm, constant temperature
General Specification - Optical System Double Beam
- Monochromator Littrow with 1200 l/mm holographic grating
- Straylight < 0.02% p.t.p. at 220nm and 340nm
- Detectors Two Silicon Diodes
- Lamp Deuterium lamp with elapsed time indicator
- Taper Beam Optics All energy collected to minimise RI effects
- Self Test Automatic at switch-on; continuous monitoring of key functions
- Autozero By control panel or external trigger
- Time Constant 0.1 sec 10 sec, selectable
- Wavelength Calibration Automatic at switch-on using deuterium emission line.
- Display Four-line display of parameters, menus, prompts, wavelength, absorbance etc.
- Fast Number Entry By use of special number keys
- Event Marking From keypad or by external trigger
- Method Storage For up to 30 methods, security protected
- Automatic Power-Up/Off Pre-programmed to save warm up time
- Outputs Two absorbance outputs, or absorbance and absorbance ratio. Data available to PC.
- Inputs Event, autozero
- Size and Weight 365 x 290 x 140mm, 17kg
- Power Requirements 115V or 230V, 50/60Hz, 50VA
PowerStream System Requirements - Computer with Pentium class processor
- Pentium 200 MHz or better
- Microsoft Windows XP
- Microsoft NT 4.0, service pack 3 or later
- 64 MB of RAM or more
- Hard-disk space required: 15 MB
- CD-ROM drive
- XGA or higher resolution monitor
- Monitor resolution 1024 x 768 or better
- Microsoft Mouse or compatible pointer
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