Beckman DU-640 Spectrophotometer

The Beckman Coulter DU 600 Series Spectrophotometers are a microprocessor controlled spectrophotometer intended for use in quantitative and qualitative biological research and industrial procedures that required spectrophotometric measurements in the UV-visible region of the electromagnetic spectrum.

The DU 600 Series operates in the wavelength range of 190 to 1100 nm. Models of the instruments are available with either a monochrome or a color video display. Data storage on a 3.5" diskette is optional. Accessories to configure the instrument for specific application needs are available in the marketplace.

The instrument features a graphic video display, which provides operational information using windowing techniques, and a mouse for operator control.

The instrument has two rapid reading modes: RediRead for taking readings at a fixed wavelength and RediScan for making a wavelength scan.

The instrument has three standard Routine Measurement modes, which are: Fixed Wavelength, Wavelength Scan, and Kinetics/Time. Other various Application modes are available, such as Protein Analysis, Nucleic Acid, Single Component Quantitative Analysis, and Performance Validation.

Manufacture Specifcations

Scan Speeds:120, 240, 600, 1200, 2400 nm/min

Data Collection Rate: 20 samplings/second

Response Time: 0.05 second

Wavelength Range: 190 to to 1100 nm

Wavelength Accuracy at 656.1 nm: 0.1 nm

Full Range: 0.2nm

Wavelength Repeatability at 656.1 nm: 0.1 nm

Full Range: 0.2 nm

Spectral Bandwidth (from 200 to 680 nm): 1.8 nm

Photometric Readout: -0.300 to 3.000 A or 0.0 to 200.0 %T

Photometric Accuracy (at 1 A NIST 930D solid filter at 546 nm): 0.005A

RMS Noise: 0.0002 A rms/0.0005 A rms

Stray Light: <0.005%

Stability: <0.003A

Baseline Flatness (from 200 to 900 nm, at 0 A): 0.001 A rms/0.003 A rms

Ambient Temperature Operating Range: +15 to 40C (59 to 104F)

Humidity: <85% maximum relative humidity, not to exceed 325C WBT