Wavelength Range
Cary models 14 & 17
Cary models 15, 16, & 118
Aminco models DW-2x
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185 to 2600 nm (with a select few extending up to 3000 nm)
185 to 800 nm (with a select few extending up to 165 nm)
200 to 825 nm (extendible to 1100 nm) |
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Photometric Noise
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< ± 0.001 ABS units throughout UV/Vis
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Drift
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< ± 0.005 ABS units/hour
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Lifetime
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Minimum of 10 years, with potential for many decades of uninterrupted utility.
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Wavelength Drive Speed
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Arbitrary, from 40 nm/sec to very slow
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Data Sampling Interval
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Arbitrary, from 0.03 sec to many seconds, in scanning mode; in single wavelength, kinetic (assay) mode, sampling every second for arbitrarily long durations.
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Light Source Changeover
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User selectable, depending upon detector and lamp preferred; automatic changeover is available as option.
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Stray Light
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< 0.0001%
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Photometric System
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Side-on photomultiplier tubes (typically, the model R955) for the UV/Vis and PbS for NIR; linear current to voltage transducer; 16 bit A/D/A converter; and Olis software.
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Recording Range
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Arbitrary, throughout optical range.
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PM Value Presentation
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Digital number on screen along with realtime presentation of the spectrum being collected.
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Photometric Accuracy
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< ± 0.001 ABS units to 2.0 ABS and < ± 0.003 from 2.0 to 3.0 ABS.
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Photometric Repeatability
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Better than < + 0.001 ABS units.
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Auto-Zero Adjustmentfully
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Under computer control.
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Baseline Stability
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<0.001 ABS units/hour after initial warm-up.
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Baseline Correction
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Automatic with all incoming records once baseline is collected.
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Baseline Flatness
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± 0.001 ABS units from 220 to 820 nm, ± 0.002 through NIR range.
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Recording Mode
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Data are read into the computer's memory simultaneous with their collection; once the data are collected, they are in memory and can be handled or stored to a permanent storage location (hard or floppy disk).
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Repetitive Scanning
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Linear and non-linear time base of arbitrary duration, as limited by speed of monochromator only. Repetitive scanning as a function of temperature is also available.
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Monochromator
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True premium quality dual beam, double monochromator system.
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Light Source
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Air cooled 50 watt tungsten for Vis/NIR and air cooled 30 watt deuterium for UV. A high intensity lamp (650 watt) for use in the NIR is available as option. The CD versions use ozone producing 150 watt xenon arcs. Alternates are possible; please inquire about specific light sources for your application.
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Detector
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For Cary models, R955 PMT for UV/Vis and PbS for NIR; for Aminco models, original PMTs or new R562 end-on PMTs.
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Sample Compartment
(View Image)
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Large (10 x 10 x 10 cm) which houses standard 1cm2 cuvette holders (two) for true sample and reference acquisition. Large chamber can be customized by Olis or client to use our high precision linear 6 or 10 multiposition cell holders, Peltier cell holder(s), stopped-flow, variable angle thin film holder, long pathlength cuvette holder, and others.
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Power Requirements
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Standard AC lines; 10 volt, 60 Hz, approximately 400 watts.
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Dimensions
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4' x 2' x 3'
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Weight
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approximately 150 kg
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Ambient Requirements
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Normal laboratory conditions. N2 is useful for flushing chamber during UV scanning; H2O is not required for cooling lamps.
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Data Processing Functions
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Store Data on Diskette, in Memory, as Numeric Table
Write Data to Video, Printer, Device, File, (hard) Disk
Retrieve Data from Diskette, Memory, Family File
Manipulate Data:
Integration
Add Constants to a Record
Multiply Record by Constant
Take Logarithm of a Record (Ln and Log)
Smooth a Record ( 5 to 25 point Gorry method)
Invert a Record
Derivative of a Record (1st to 4th order)
Add a Record to Another
Subtract two Records
Scatter Plots
Multi-Component Analysis and Deconvolution
Polyexponential & selected Nonexponential routines for fitting large or small, complex or simple kinetic data. These algorithms are also used in the Olis program for creating synthetic (theoretical) data for comparison and pedagogical purposes. Approximately 50 equations are available for resolving zeroing and non-zeroing data.
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Collection to External PC
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Required and provided with system. Olis uses the most contemporary computer hardware available; Pentium 866 MHz computers will be distributed with 2001 systems. User supplied modern PC must meet Olis' minimal requirements. The connection to the PC is intimate and necessary; the spectrophotometer operates only with the computer control.
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Backup Functions
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Experimental protocols are stored with each record for immediacy of reinstating previously used settings. Data are stored automatically in RAM for subsequent storage by user to more permanent location (hard or floppy disk).
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Data Display
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Included on screen during start-up and written to every stored data file.
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Custom Features
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Any algorithm for data collection, presentation, or analysis which is not already a standard feature in the Olis Spectroscopy Operating System (software) can be added by Olis programmers to yours and subsequent versions of the software. Since 1980, the Olis software has expanded to include a wealth of options for working with kinetic (assay) and spectral (scan) data sets.
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